Depends on the make and model of the vehicle. On newer cars check the power distribution box where the relays are located.
Check under the air filter housing for the PCM (power control module) if you could open it you would see about 5 relays on a circuit board one of the relays is for ac compressor. In general change the PCM.
Mabe your compressor is not kicking on for some reason. Check to see if the front of your compressor starts spinning when you turn it on. If it don't check to see if there is power to the wires that go to your compressor. If there is power you have a bad compressor. If there is not check the fuses or relays.
In a nutshell, it's a power source for propelling the vehicle, and powering the alternator, air conditioning compressor, and power steering pump.
The fuses and relays are in the power distribution box.jd
Look under the hood in the power distribution box and you will see a group of relays and it will be the top one on row one (compressor clutch relay).........
These relays (For factory installed power windows) Should be located with the power door lock relays, just under the dash on the passenger side of the vehicle, part way behind the kick panel. These relays will be mounted to a bracket.
The 1991 crown Victoria has several relays group in a relay center loacated under the hood near the master brake cylinder. In this relay center its the air conditioning WOT cutout relay, fuel pump, PCM power relay, and PCM power diode. P.S. defective relays must be replace as a unit.
A drive belt will go around the pulley on the alternator . If you have a serpentine belt it will drive all the accessories attached to the engine . Alternator , power steering pump , air conditioning compressor etc .
Most likely, it is a stuck contactor or relay that controls the compressor motor. If the compressor continues to run after the blower inside the house has shut off, the only way to stop it is to kill the power, either at a dedicated switch or sub-panel for the air conditioning, or at your main breaker panel. Turn off the power to the air conditioning and furnace system until you can have the unit serviced.
front right hand top side, has a belt drive, look for the hoses that go from the power steering fluid reservoir to the pump just a short distance away. the air conditioning compressor is below the power steering pump.
The fuel pump relay is located in the back of the glove compartment. The relays under the hood should be for the AC compressor and the HVAC blower motor high speed. Be sure to check the fuses also.
There are many relays in that vehicle, most are located in the power distribution box under the hood.
The Constant Control Relay Module(CCRM)interfaces with the Power Control Module(PCM)to provide control of the cooling fan, A/C Clutch and fuel pump. The module also includes the electronic engine control(EEC)relay to provide power the PCMThe CCRM is a set of 4 relays in one module. The relays are :1. Relay for the PCM (Powertrain Control Module)2. Relays for the high and low radiator fan speeds.3. Relay for the fuel pump.4. Relay for the Air Conditioning clutch on the compressor.
If you are refering to the A/C compressor, it is under the power steering pump, on the right side of the engine, while facing it.
What specific kind of vehicle do you have? It does sound like the clutch may be bad, but we also need to know what you are working on. You need to run power straight from the battery to the compressor. If is still does not engage then you need to replace the compressor and clutch, they are dead. If they do engage, then you have a wiring or computer issue.
It is located in front of the battery, it is a plastic box with fuses and relays
in the black housing in front of the windshield washer fluid
Air conditioning uses a compressor to chill the freon that cools the air. The compressor requires a good bit of power to run- and places an additional load on the engine. This requires the engine to burn more fuel, and your gas mileage decreases. There is no free lunch- the power to run that compressor had to come from somewhere, right?
Power door locks have relays located inside the cabin fuse box. Locate the relays for the door switch and see if they need replacing. If so replace the units.
That's the accessory drive belt at the front of the engine for your power steering , air conditioning compressor , alternator etc.
Check the following.......... 1. Power and ground to the compressor clutch coil.. 2. Pressure switches and relays.. 3. A/C -heater controller.. Without the year, make and model its very hard to narrow it down..
You should already have relays if you have power doorlocks
The relay for the power antenna on a 95 jeep grand Cherokee is located inside the glove box. You have to remove a panel that is in the "floor" of the glove box and there are several relays in there. There are 6 small relays and 6 large relays, the antenna relay is the top left large relay.
The A/C compressor is located at the right side top/front of the engine, right above the power steering pump...