Skip the auto shop - Our mechanics make house calls

Q: A/C compressor clutch does not engage, cooling fan does not turn on, condenser fan does not turn on, and ceiling light does not turn on.

asked by on

A/C Compressor Clutch do not engage, Cooling Fan do not turn on, Condenser Fan do not turn on, Ceiling light do not turn on when I open a door, emergency brake dashboard indicator always on

After reading a lot there are some possibilities: 1- Open ground at the chassis 2- Under Dash fuse box multiplexer bad 3- 4- Please help
My car has an automatic transmission.

Hi there. The air conditioning clutch could be not working for the refrigerant could be low or the clutch could be burned up. Check the air conditioning compressor clutch wiring for a voltage with the a/c switch on high and fan on high. If there is a voltage present then the clutch is burned up and needs replaced. If there is no voltage present, then the system could be low on refrigerant or the low or high side pressure sensor has failed. If there is voltage to the sensors and nothing past the sensors, then the system is low on refrigerant. If there is no voltage to the sensors, then the a/c switch would need to be replaced.

The cooling fans and condenser fans either are not coming on from a loss of power or the motors are burned up. First check the cooling fan circuit. If there is no power to the cooling fan, then check the fuses and see if they are burned. If the fuse is good, then check the cooling temperature sensor / switch. If the sensor has power to it an after, then the switch is working. If there is no power after the switch, then the coolant temperature sensor / switch would need replaced. If there is power to the motors on the cooling fan, then the fan motor is burned up and needs replaced. For the condenser fan, if there is no power to the fan, then check the fuses for any of them burned. If the fuses are good, then the a/c switch would need to be replaced. If there is power to the motor, then the condenser fan motor is burned up and will need to be replaced.

For the ceiling light (courtesy light) is not working when the door is open, then there could be an issue with the bulb being burned or the switches are damaged. First check to see if the light is just turned off. If the light is on the door settings, then check the doors one at a time and see if the door courtesy light switch is broken, stuck, or has a loose or corroded ground. If the ground is good and there is no problems with the switch wiring, then I recommend replacing the door courtesy light switch.

For the parking brake light always on, check to see if the parking brake lever is all the way down in the unlock position. If the lever is all the way down, then check the parking brake sensor on the parking brake lever and see if it’s working.

If you need further assistance with the issues your are facing, then seek out a professional, such as one from Your Mechanic, to help you with the following:

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • A/C compressor clutch does not engage, cooling fan does not turn on, condenser fan does not turn on, and ceiling light does not turn on.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Random and seemingly instantaneous coolant leak after attempting to bleed the cooling system.

It would seem that there may be excessive pressure in the system for some reason. Because you replaced the cap and now presumably this is keeping a better seal on the coolant from coming out of the cap, it may...

Q: Electrical problem

Electrical concerns can often times be difficult to narrow down. It appears that your Mazda may have corrosion issues with its battery cables. It is not uncommon for the battery cables to develop corrosion near the battery terminals. Corrosion tends...

Q: How do I remove the antenna?

The antenna can be removed to help your vehicle fit into short places. The antenna should also be removed any time you use an automatic car wash. To remove the antenna, simply unscrew it by hand.

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...