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Testing Your RV AC Capacitor. Switch off the AC circuit breaker to the RV. If you’re having trouble finding it, check in the electrical load center on your RV. If you’re connected to shore power, remove the connection. Head up to the roof of your RV and unscrew the protective housing around the air conditioner unit.Jul 20, 2023 · 1. AC Unit Not Powering On. A common and clear sign of a blown AC fuse is if the AC unit is not powering on. If your unit doesn’t respond when you adjust the thermostat, this could be an indication of a blown fuse. 2. AC Unit Stops Blowing Cold Air.1. AC Blowing No Air at All. If your Chevy Tahoe has no air moving through the climate system at all, that's a lot easier to diagnose than the air that is blowing not being cool enough. When there's no air flowing through the vehicle's cabin, a bad blower motor usually causes this scenario.Inside will be a small piece of metal that the electrical current will flow through. If the amperage exceeds the acceptable limit, which will be the fuse rating, it will melt the piece of metal on the inside and stop the flow of electrical current, which means that your air conditioner fuse keeps blowing. If you have ever experienced a tripped ...So, I keep having the problem of the 10 amp fuse blowing in the under hood fuse block. I have done a good bit to rule out possible causes along with preventive maintenance. Here is a list of what I have done: 1) Replaced/checked/rechecked all fuses having to do with the ECM,BCM and AC.The most common reason for an AC fuse to keep blowing in a car is because the air conditioner system has a fault. This could be due to a short circuit, an overload of current, or an electrical component that has failed and is drawing too much power. Other reasons include faulty wiring, contamination from dirt or moisture getting into the system ...A portable AC unit is a great choice if you want mobile air conditioning that you can move from room to room. Here are the best portable air conditioner to choose from. If you buy ...Gree AC Not Blowing Air. If your Gree air conditioner turns on but doesn’t blow out any air, it’s likely to be a clogged air filter or defective thermostat. Possible Solution(s): Remove the filers with care and gently clean them, removing any dust on the filters. If the AC fan blades are not able to rotate, the AC won’t be able to blow ...The most common causes for AC blowing hot air in Ford Focus are low or overcharged refrigerant, compressor malfunction, dirty condenser or evaporator coils, faulty blend door actuator, defective evaporator temperature sensor, bad AC pressure sensor, and bad fuse or relay. Less common causes are clogged expansion valve or orifice tube ...Signs Your AC Fuse is Blown. The AC fuse is a safety mechanism there to turn the machine off if there is an electrical overload. Without the fuse, your air conditioner could be damaged by the current and you could end up needing to replace the whole unit. Because the fuse has blown, the air conditioner is protected. If your AC fuse is blown, it ...Jan 27, 2022 · A clogged air filter may be the culprit for your HVAC unit blowing fuses. If you’re having problems with the unit not operating properly, it could be the result of a clogged filter. To check if your air filter is clogged, first deactivate the unit and remove the filter. The air filter is usually dark brown or black and is found at the front ...Clean the air conditioner. 7. Leaky AC. Blocked condensate line or tube disconnection. Unblock the condensate line and reconnect disconnected tubes. 8. Fujitsu AC Won't Turn Off. Dirty condenser or evaporator or a faulty sensor. Clean a dirty condenser or evaporator and call an expert to fix a faulty sensor.AC power comes into the RV from your generator, or from the campground or other outlet you plug it into: a 20-amp, 30-amp, or 50-amp supply. The AC power control panel distributes this power to the appliances and outlets that use AC power, for example the air conditioner.2004 safari keeps blowing fuses when i turn on the ac. what i did i went alll the way to the ac compressor and cut the clutch wires thinking is a short.. ... i had to put in a 5amp diode i found at radio shack.. now the ac compressor woks fine but no cold air very low pressure on low side and high 250 on high,How can your car's air conditioner reduce germs? Find out how your car's air conditioner can reduce germs in this article from HowStuffWorks. Advertisement If you think you have en...Sep 15, 2023 · Car AC Keeps Blowing Fuse Due to Faulty Field Coil. A field coil is designed to generate a rotating field as part of the AC’s electric motor. When it’s working optimally, the field coil will have 3-4 amps of current. However, if the field coil becomes damaged, it can start to carry upwards of 10 amps of current.3. Post Likes. The 24v fuse keeps blowing intermittently in the AC mode only. Sometimes immediately, sometimes after hours or days. Can't be the fan or heater circuits because the problem doesn't occur in the heat or fan only mode. The system was installed 4 years ago and the installer has replaced the circuit board under warranty & …Cut down on your energy bill and have a cooler home. It's a win-win. As temperatures across the country continue to rise—along with the humidity and our electricity bills—our air c...The most common causes for AC fan blower motor not working are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.I have a 2006 caravan when I turn on the air it blows the fuse. Its the fuse for the air conditioning and I have changed - Answered by a verified Dodge Mechanic ... My parents have a 2000 dodge caravan that when you turn the air conditioner on. It blows hot air. I mean real hot air, not like just being low on refrig. I opened the glove box and ...A common problem behind an air conditioner blower not starting includes overheating, which keeps the motor from running. Let your air conditioner rest and cool down for a while before trying to turn it on again; if the motor works at that point, overheating is probably the problem. Hitting the overload reset switch is a quick and easy ...207 Answers. SOURCE: my 2003 jeep liberty's air conditioner blows hot. Probably, to be sure make sure the compressor is coming on. With the engine running turn on the ac and watch the rpms, they should drop for a second if the compressor is coming on. If so you just need to recharge, the refrigerant is R-134a, which you can get from your local ...Here's the wiring diagram: Ferrari 550 HVAC Wiring Diagram. It's a complicated diagram (overall), but find fuse 22, then track the red wiring to relay "M", then follow the wiring to relay panel plug "E". There is a small graphic above the fuse panel which shows where this plug is physically located on your car.Air conditioner, fuel gauge, and temp gauge all stopped working at the same time. Three possibilities; All related to blown fuses, 1- Fuse blown in the engine compartment LH. 2- Fuse blown in the cabin forward LH below the dashboard (below your legs left hand). 3- Fuse blown in the harness (wire bundles) below the dashboard very easy to reach ...Every time I turn on my air conditioner it will blow for a while then it will shut off. I chek the fuse and it blows the fuse. I have changed the fuse and the same thing happens. Please help. Posted by twinstar9520 on Oct 14, 2010. Want Answer 0. Clicking this will make more experts see the question and we will remind you when it gets answered. ...When your AC is not turning on, check the air filter and replace it if it is dirty or clogged. Doing so will not only improve air quality but also ensure efficient operation of your air conditioner and prevent it from shutting down. 4. Refrigerant Leaks. Low refrigerant levels can prevent your AC from cooling properly and may even cause it to ...I read a possible climate control prob.. If you need to simply stop the hot air from blowing. Go under the glove compartment, remove the black cover (3 screws). It is located to the right of the hump. If you loosen the 8mm screws that hold it in place, pull it off, then manually move the rod that turns the actuator.Make sure "A/C" is selected, then choose a temperature that's lower than the ambient temperature outside. If "A/C" is definitely selected and the temperature is set to low, but your fans still blow warm air, your thermostat might be broken. Have a mechanic check your thermostat and repair it. 3.Air-conditioning, when we turn the AC on the 3M fuse on the circuitboard blows, however the heat works fine and the fan - Answered by a verified HVAC Technician ... When I turn the AC on, the outside unit comes on and definitely circulates, but the blower does not come on and blow air. When I turn the heat on, ...1. Lack of Cooling or Heating. If your HVAC system fails to produce sufficient cool or warm air, this is often a telltale sign that its fuse has blown. Many times this is due to a faulty compressor, and you should contact a professional for assistance as soon as possible.A “fuse for AC compressor” is a small yet mighty component that often flies under the radar. With this guide, we aim to bring this essential element into the light, unraveling its function, types, and how you can handle its replacement. Image by ILO Asia-Pacific on Flickr. Brief Overview of Fuse for AC Compressor.Jun 3, 2020 · 1. I have Rheem HVAC system that is about 12-4 years old (its an R22 unit). Today it started blowing the fuse on the board when cooling kicks on. The tstat shows a message that says power failure, then 1-2 seconds later, the fuse blows, and the whole thing turns off. Some additional background: I have an ecobee4 smart thermostat.So, I keep having the problem of the 10 amp fuse blowing in the under hood fuse block. I have done a good bit to rule out possible causes along with preventive maintenance. Here is a list of what I have done: 1) Replaced/checked/rechecked all fuses having to do with the ECM,BCM and AC.Everytime I turn on my AC it blows my AC fuse under the dash behind the little compartment. This is in my 2000 Outback. ... Hook the hose on the low side fitting [it will only fit on the low side] ,start the car, turn the air on full blast, slowly add the r134a to the system and keep checking to see if it starts blowing cold air. Once it starts ...According to About.com, if your air conditioner keeps blowing fuses or tripping circuit breakers, it is because the appliance is trying to draw more current than the fuse or breake...Apr 26, 2021 · If there is the voltage on the “line” side, test for voltage on the “load” side of the fuses by placing the meter’s leads on the load wire lugs. If you read voltage on this side (220-240V), this means the current is flowing through the fuse. If you get a zero-voltage reading on the load, this means your fuse is blown.See if the fuse blows when in fan mode (No heat or AC). This would mean a problem with "G". ... loosen all wirings and connected R to Y & G at the same time, turned on unit, fuse blew. Carrier unit Model #: 58STA090---1114 Serial #: 4404A40864 ... Series G furnace with central air that is blowing the 3-amp fuse on the control board. The furnace ...Unplug everything that's reasonable. Using a jumper, jump the furnace on at the control board without the thermostat connected. If the fuse doesn't blow, turn the power off, then add one component back in at a time and repeat the procedure until you figure out which one is blowing the fuse. For me it turned out to be the pressure switch. 1.Aug 19, 2023 · Solution: Clean The Filter. Step 1: First, remove the HVAC filter from the AC unit. Step 2: Then, gently suck up any debris accumulated on the filter using a vacuum cleaner. Step 3: If the filter is filthy, you may need a mild detergent and a soft brush to scrub it.With the scorching heat of summer, many homeowners are turning to mini split air conditioners for their cooling needs. These compact units are known for their efficiency and versat...Confirm that the furnace is turned on from the circuit breaker. Check the fuse on the furnace control board (3 or 5 amp) and replace if blown. If the fuse isn’t blown, check for a short in the C wire and consider using the PEK or repurposing a wire as C. If your ecobee was working before:few weeks ago I noticed a "funny" smell in my 2010 Forester and then realized that no matter what setting there is no air coming out of the vents. I checked /replaced the Blower Resistor , still having the same issue. I removed the blower motor put a 9 volt on it and it started spinning. I measured the voltage at the blower and there was none..Check the fan motor: Manually spin the fan blades. If they don't move smoothly or there's noticeable resistance, the motor might be defective. Also, burnt odors or visible damage on the motor are other signs of failure. Inspect the thermostat: Ensure the thermostat's settings match your desired temperature and mode.Isolate power to the pump. Best to turn off main consumer unit switch as pump could be supplied by boiler or elsewhere. 2b. Disconnect pump wires either at the pump, or in the wiring centre. Prefer in pump as less likely to disturb something else. Insulate wires. 2c. Power back on and try thermostats again. 3.Recharging the refrigerant to the appropriate level is necessary to restore the cooling performance of your car's A/C system. Additionally, other potential causes for a running but non-cooling A/C system include a malfunctioning compressor, a faulty expansion valve, or a problem with the condenser.2. AC compressor is not turning on. One of the most obvious signs that the AC relay may have a problem is that the compressor is not coming on at all. In most cases, when the AC is turned on you will be able to hear the compressor switch on. It will usually produce a familiar clicking noise from the clutch being activated.2. Blown fuses. One of the first symptoms of a bad or failing AC blower motor relay is a blown AC blower motor relay circuit fuse. If the blower motor relay develops any sort of problem that hinders its ability to properly limit and distribute power, it may cause the blower motor fuse to blow. Any sort of electrical spikes or excessive current ...Here are a couple of issues that may cause your AC to turn on but not blow air: 1. Incorrect Settings. Double-check your thermostat settings to ensure they are properly configured. Make sure the temperature is set to a cool setting and the fan is set to “auto” or “on.”.Find the switch next to the furnace and turn it on to power the blower fan. Otherwise, moisture in the warm air will condense inside the unit, freeze on the coils, and shut the system down, keeping the unit from turning on. You may want to mark the switch as that for the blower and furnace for future purposes. 5.1. I have an outside A/C compressor and indoor furnace fan combo in the attic. The unit was off and the 3 amp fuse was blown. I replaced the fuse and used the thermostat to turn the fan on followed by the heater then the A/C. I let the unit run the A/C. After a while the A/C turned off. I checked and the furnace was off, fuse blown and ...A faulty valve. If you have a gas-fueled furnace with a fuse that keeps blowing, inspect the safety valve on the equipment. It should be able to open and close when needed. If the valve is clogged, it may be forcing too much out or keeping too much heat inside the unit. In many cases, this can cause the furnace to overheat, potentially igniting ...Replace the fuse, start the car and turn the ac button on. If there is a short between the button or relay and the compressor, it should still blow the fuse. If that doesn't happen, I would guess that it has something to do with the electromagnet in the clutch either being shorted out or somehow drawing way too much current.If you've been feeling the heat a bit too much this summer, friends at the Wirecutter have put together a guide for finding the perfect air conditioner, so you can keep cool and co... If your Daikin air conditioner is blowing hot Air conditioner fuse block pull-out. If your home air conditIt's possible your filter or coils just need a quick

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Remove the air filter and wash it in warm water and dishwashing soap if it is not older than three months. Allow it to dry before replacing it. If the filter is older than three months, replace it with the correct type of air filter. That is when you can replace the damaged fuse. 2.If there is the voltage on the “line” side, test for voltage on the “load” side of the fuses by placing the meter’s leads on the load wire lugs. If you read voltage on this side (220-240V), this means the current is flowing through the fuse. If you get a zero-voltage reading on the load, this means your fuse is blown.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...Advertisement Connectors are critical to today's cars. Without them, it would be nearly impossible to build or service a car. Whenever a bundle of wires passes through or attaches ...The fuse in a window air conditioner is responsible for protecting the unit's electronic control. It can blow if the power supply is not good or if the unit overheats. The blown fuse will cause the power supply to be cut off, resulting in the AC unit not working. The fuse is usually located in a grey disconnect box near the outdoor unit.1. AC Blowing No Air at All. Usually the culprit. If your Mazda 3 has no air moving through the climate system at all, that's a lot easier to diagnose than the air that is blowing not being cool enough. When there's no air flowing through the car's cabin, a bad blower motor usually causes this scenario.The most common causes for AC fan blower motor not working in Chevy Silverado 1500 are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.Higher heat results in higher current draw resulting in your breaker tripping. Perform regular cleaning of these components. 6. Problem With Coil Fan Motor. Air conditioners use a coil fan (or AC blower) to move hot air over the condenser coil and disperse heat, leaving you with cold air.Often this window air conditioner problem can be fixed by just plugging back in an unplugged cord from the outlet. If that's not the case, check your electrical circuit box for a tripped breaker or blown fuse. Reset the breaker, if necessary, or replace the fuse. Note: A fuse must have the proper amperage rating for the circuit.Air conditioner won't turn off. 7 possible causes and potential solutions . Learn More. Featured Video. Video. 02:16. Air conditioner is loud or noisy. ... Thermal Fuse & Breaker Parts Kenmore Gas Burner & Control Valve Parts Kenmore Gasket & Seal Parts Kenmore Grille & Kickplate Parts Kenmore Handle Parts Kenmore Heating Element Parts.Step 1: Switch off your AC. After power outages happen, you’ll have to turn the thermostat to the off position. When the thermostat is off, an air conditioner won’t accept power from the electricity points. Also, reset the air conditioner battery pack to see if it resolves the thermostat issue.2008 6.4 Air Conditioning Problems. The AC in the truck is not working. It has been cold here for a while, so maybe this occurred earlier, and I just didn’t notice, but a few months ago, it was in the 80’s and I turned my AC on. It was blowing warm air, and has not worked since. I have also noticed that the fan speed seems to adjust on its own.Re: M33 AC blowing 15 amp fuse. danemayer said: The A/C units run off 120V AC (shore power or generator). But there's some 12V interaction. The thermostat uses either 5V or 12V DC to signal the A/C unit to start/stop. On many trailers, there's a relay box above the air return where a 12V DC relay turns on the 120V AC power to the A/C unit.When an outside fan fails, the most likely cause is a capacitor issue. Capacitors store up the energy that powers the air conditioner's fans. A capacitor may be used to start the fan and keep it running—as in a start/run capacitor. Some units also have dual capacitors that power you air conditioner's fans, as well as your compressor.Your Mercedes vehicle will flash a host of service lights to inform you when something might be damaged inside the car. If the air conditioner unit is not running normally or is on...The most common causes for AC fan blower motor not working in Chevy Tahoe are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.We know it's related to whatever the AC / heater system is controlling. The logical first guess would be a shorted AC compressor clutch coil. Unplug that, then see if the fuse blows when you switch the AC on. If it does, a simple trick to finding a short is to replace the blown fuse with a pair of spade terminals, then use small jumper wires to ...1. AC Blowing No Air at All. Usually the culprit. If your Hyundai Elantra has no air moving through the climate system at all, that’s a lot easier to diagnose than the air that is blowing not being cool enough. When there’s no air flowing through the car’s cabin, a bad blower motor usually causes this scenario.AC/Heat pump unit wont turn on at thermostat so went up on roof and pulled panel to find 5A fuse blown. Replaced and it blew again. Any ideas or help would be greatly appreciated.The fans should turn on when the A/C system is turned on. The easiest way to start diagnosing the problem is to turn the A/C system on and watch or listen for the radiator or condenser fans to also turn on. You can do this without driving the car, but just have it running in your driveway. If the fans don’t turn on, the fans are either faulty ...A "fuse for AC compressor" is a small yet mighty component that often flies under the radar. With this guide, we aim to bring this essential element into the light, unraveling its function, types, and how you can handle its replacement. Image by ILO Asia-Pacific on Flickr. Brief Overview of Fuse for AC Compressor.You may have to replace the old smaller fuse with a new bigger fuse. Following are a few consequences of blown fuses: Disruptions in cooling. When the AC starts behaving strangely, it is a sign that the fuses have blown. There are multiple disruptions in cooling. Even if the AC starts cooling, it stops after a while. Dust in air filters3.9L. 6 CYL. 2WD. AUTOMATIC. 140,000 MILES. I just put a new a/c unit in my Uplander and changed the serpntine belt and now the a/c keeps blowing the fuse after about ten or fifteen minutes. I have checked the diode and it is still good and took the plug off compressor and had car running for twenty minutes and fuse dosent blow so I am at a ...Both times so far the problem has been that the fuse on the inside of the air handler has been blown. It seems to run fine while it is running. The fuse doesn't blow while its running and shut it off prematurely. It just blows after the air conditioning is shut off by the thermostat.Avoid this issue by regularly scheduling AC tune ups in San Diego. Capacitor failure. Your air conditioner has a capacitor, a component that regulates the flow of electricity into the condenser and compressor. If your AC capacitor has broken down, it may cause the air conditioner to blow fuses. You should have your capacitor tested or replaced ...Oct 3, 2022 · 1. AC Blowing No Air at All. If your Chevy Tahoe has no air moving through the climate system at all, that’s a lot easier to diagnose than the air that is blowing not being cool enough. When there’s no air flowing through the vehicle’s cabin, a bad blower motor usually causes this scenario.07 F150 Screw, 5.4 auto. I have had this happen twice now while driving on the freeway. The AC ducts will start blowing hot air, then I hear a grinding noise from the AC compressor. I shut off the AC and the noise stops. Each time I replace the fuse and it works great. Got underneath and check the wiring and connections.Goodman controller board fuse blows [ 8 Answers ] I have a Goodman GMPN120-5, service guy replaced PCB in Aug due to A/C failure, root cause unkknown or not documented. Last week I turned on heat for first time this season, now nothing runs. Service guy returned, located blown 3A PCB fuse, replaced, still blows. Replaced fuse with 5A for testing...Failing Valves. If you have a gas furnace with a fuse tFind the switch next to the furnace and turn it on

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The most common causes for AC fan blower motor not working in Nissan Rogue are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.It can be a frustrating moment when you turn on your air conditioning, heater, or defroster and no air blows out. If you drive a car made in the 1980's or early 1990s, there may be something you can do. ... If the fuse blows right away, your car may have a bad blower motor or some other problem in the system. If the blower works when you ...Feb 28, 2021 · They will return your unit to its fully-functioning and safe condition. Stud Air Conditioning is a full-service installation, maintenance, and repair HVAC company serving Broward, Miami-Dade, West Palm Beach, and Port St. Lucie counties. Call us when you need help with your heating or cooling needs at (954)324-2905. We can help!In some cases a blown fuse or faulty fuse can cause your air conditioner to keep tripping the breaker. These air conditioner problems are easy to fix fast. Help! My Air Conditioner Keeps Blowing a Fuse! Since blown fuses are usually a simple air conditioner repair job many do-it-yourselfers choose to try to replace blown fuses on their own.Ensure it’s in the “on” position, and if not, flip it back on and see if that resolves the issue. 2. Thermostat Malfunction. A faulty thermostat can cause an air conditioner to stop working. Make sure that your thermostat is set to “cool” mode and the temperature is set lower than the current room temperature.the fuse that connects my air conditioner and my blinker blows. Before I turn the air on or use the blinker. It - Mercury 2000 Grand Marquis question. ... The fuse that connects my air conditioner and my blinker blows. Before I turn the air on or use the blinker. It just blows out as soon as a I put one in. Posted by marcus956 on Jun 14, 2011.6 CYL. FWD. AUTOMATIC. 140,000 MILES. When key is turned on HVAC fuse blows. The fuse powers the AC control unit. I have no temperature control, vent selection, rear defogger, outside/inside vent or A/C. blower motor control works. I have replaced control unit in dash fuse still blows with controller and A/C unit unplugged.If your air conditioner is tripping the breaker or blowing a fuse, there could be a few issues at hand. Learn more from Air Experts! Request an estimate . Make A Payment . Give Us A Call: 919-480-2727 BOOK NOW. ... Reasons Why Your Air Conditioner Is Blowing a Fuse or Tripping the Breaker.2008 6.4 Air Conditioning Problems. The AC in the truck is not working. It has been cold here for a while, so maybe this occurred earlier, and I just didn't notice, but a few months ago, it was in the 80's and I turned my AC on. It was blowing warm air, and has not worked since. I have also noticed that the fan speed seems to adjust on its own.If the compressor does not engage when you turn on the A/C, see if it will run by jumping the compressor clutch wire directly to the battery (use a fused jumper wire). If the compressor works when you jump it, and the A/C blows cold air, the system contains refrigerant and the fault is likely a bad A/C compressor clutch relay or a bad clutch ...1. AC Blowing No Air at All. Usually the culprit. If your Hyundai Sonata has no air moving through the climate system at all, that’s a lot easier to diagnose than the air that is blowing not being cool enough. When there’s no air flowing through the car’s cabin, a bad blower motor usually causes this scenario.Both times so far the problem has been that the fuse on the inside of the air handler has been blown. It seems to run fine while it is running. The fuse doesn't blow while its running and shut it off prematurely. It just blows after the air conditioning is shut off by the thermostat.Locate the RV’s fuse panel, which is usually found in the interior living area of the RV. Open the fuse panel cover to access the fuses. Refer to the RV owner’s manual to identify the specific fuse that controls the air conditioner. When troubleshooting AC fuse issues in an RV, you will need the following tools:The most common causes for AC fan blower motor not working are blown fuse, bad relay, resistor or control module malfunction and faulty blower motor. However, a bad electrical connector or broken wire, or a defect in the climate control unit can also cause the blower motor to stop working. 1.A problem with your fuse box, your circuit, and/or your central power supply .The most logical cause of your air conditioner tripping a breaker or blowing a fuse is when there is a bad electrical connection in the power supply, or the circuit that powers the system. Breakers and fuses are designed to trip or blow when too much voltage is sent ...48,601 POSTS. If it keeps blowing you will have to put a circuit breaker and unplug things to rule out what is doing it. Then once you find the problem you'll have to see if it is drawing to many amps etc. Of course it could be a wiring grounding out against the engine block/body so check harnesses as well. Was this.2009 Mercury Grand Marquis. Asked by fmcrac47 in Conroe, TX on October 13, 2016. The AC has been working without any problems until late a last week. It started to blow hot air instead of cold. I checked the compressor, and it's cycling just like it's suppose to. The lines are getting cold but no cold air. Was told that it's a switch under the ...The most common causes of why a radiator fan is not working are a blown fuse, a bad relay, or a broken wire. It can also be caused by a faulty coolant temp sensor, low coolant level or the fan itself can be damaged. While these are some of the reasons, the list is not exhaustive. Here is a more detailed list of the most common causes of a ... Here's how to fix it. Quick answer: To