Probably a low or high pressure switch. Pull the plug off of each one. Take a piece of wire and strip each end of it. Push the wire ends into the plug. Start the car and turn on the a/c. If it works you found the bad switch. Get a new one and your back in business.
Check the switch in the line, Check the clutch on the front of compressor is turning by hand it could be seized.
SOURCE: ford crown victoria ac not working. need help to
If the compressor doesn't engage..it could be the pressure switch and or it could also be low in a134 to the system.
Best would be to jump the clutch wire from the compressor (i.e. direct tht wire on the positive terminal or any nearest available 'live' point).
Let the car's engine run and also the AC control switch to "ON' postion having the blower fan inside the car running.
Once done all this check if the compressor is now running and if theres cooling inside the car and also best would be to check the sight glass for any bubbles , this is normally situated around the filter/drier at around the condensor infront of the radiator or within the area.
If the compressor runs and theres cooling thn theres a problem with your pressure switch, if theres low cooling thn you may need to recharge the a134 and run a leakage test.
Hope this helps!
SOURCE: 2008 dodge nitro 3.7 engine. The engine missfires
Have it checked for trouble codes sounds like it could be an injector problem or something as serious as a loose rocker,maybe try a crank&cam shaft position sensors
SOURCE: 2008 dodge nitro change oil light how to turn off ...
Directions are in the book, but you would put the key in and turn it all the way, just don't start engine. Pump gas pedal all the way to the floor 3 times slowly, but it has to be with 10 seconds. Turn key off and when you start again, oil changed chime and warning should not be on. If it is, try again.
SOURCE: 2010 Dodge Nitro AC Fuse for fan location
First, it would be nice to know WHICH fan you are talking about. The engine cooling fan? The heater-A/C blower fan?
Second, this might be the time to educate you about fuses. Fuses do not cause electrical failures, Electrical failures cause blown fuses.
With that being said, it is highly unlikely that if you find the fuse you are looking for, that it will solve your problem.
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