Check the ac control on the dash. The ac compressor relay is responsible for supplying power to the ac compressor and clutch.
Always check out the technical sheet of the compressor (click here and check out the electronic catalog of embraco).
How to check ac compressor relay. If the part is solid state, then you will have to have a professional test the part, as it requires specific equipment for testing. You can check the compressor with a voltmeter to see if there is ac voltage on it when the a/c system starts. However, if this rubber label is not available or removed then follow the below steps.
This article originally appeared on yourmechanic.com as signs of a bad or failing ac compressor relay. Notice that two of the four wires going into the plug are a larger size than the other two. Always check out the technical sheet of the compressor click here and check out the electronic catalog of embraco.
To bypass the relay, plug the a/c back in. 1991 silverado, 1500, air only works if you get under hood and connect battery to air compressor. When you switch on the air conditioning, the capacitor supplies the required electricity for running the compressor and the a/c fan.
If you have a wirewound relay, pull it straight off of the compressor. If you want to diagnose an ac compressor clutch for defects, apply these techniques: Please read our safety information before attempting any testing or.
This is how to check the ac compressor clutch. With the wiring plug still plugged in, touch the jumper wire to the hot side relay lug, from the controls as already identified and from the relay lug that feeds the a/c compressor. You can test the clutch relay for power with a test light.
Test it is using a multimeter to make sure it is working properly. If you are experiencing issues with your ac system and suspect that your ac relay has either failed or is beginning to fail, we recommend having it diagnosed by a professional. If the battery voltage reads below 12.5 volts, the compressor will not turn on.
Suppose the compressor clutch is not engaging; Then, attach the black wire to the negative side of the battery. If your ac is not properly cooling the vehicle, the ac clutch relay could be faulty.
The compressor relay is the largest component and will either be wirewound or solid state. Locate the relay in the power distribution box, usually found under the hood, and unplug it. The relay is accessed from the lower rear of the refrigerator.
Also, find out whether the clutch and the pulley are spinning. Without this relay, the ac compressor will not have power and the ac system will not function. A faulty capacitor can also be the reason for the rv air conditioner compressor not coming on.
A faulty relay can result in the compressor failing to cycle on. If the power and ground checks out in the relay socket, test the relay by swapping in a similarly sized relay. Connect your negative, or black battery cable with the grounded contact in the compressor.
Touch the negative lead of the voltmeter to the negative battery terminal. In your car’s fuse box, locate the air conditioning fuse and take it out. With the relay in the vertical position, coil of the relay upwards, check if there is continuity between terminals 1 and 3 of the relay.
If you cannot get the compressor to kick on and cannot find the problem with troubleshooting, you may need to replace the ac compressor. Check the front side of the clutch to examine its condition. Asked last night and was told to check air conditioner relay switch.
Connect the positive, or red wire, to the positive side of the battery. The compressor is the unit that cools the air before it enters into the honda's cabin. The next step is to check whether the compressor is being driven when the ac is switched on.
The ac compressor clutch is the power feed to your ac compressor. Fit the relay and press to fasten it in the compressor. From your previous posts you mention that the ac relay is part of the ipdm.
Inspect the wiring and the plug for heat damage and repair as needed. In the photo below the compressor is labeled a, the relay is located in the terminal box which is located at the position labeled b. This is also the same way of how to test the ac clutch relay.
Set all air conditioning controls to the max before kicking off the engine. Refer to this relay diagram to determine which pins in the socket should have battery voltage when the key is in the run position and which should have ground when the high and low pressures are within limits. If you still get a low reading, the battery has a shorted cell and must be replaced.
The ac compressor will not have power and the ac system will not function. Can't find it, have looked under … read more Now if you want to check the air conditioner compressor then it's also too simple, in the air conditioner compressor we have labels in which the r, s, and c written or parked.
How to examine the ac compressor clutch? How to test or check air conditioner compressor motor windings. This will bypass the relay and engage the a/c compressor and confirm that the relay is defective.
It has continuity when removed from the circuit. The amber ac light is illuminated on the dash. It has 14vdc all the time while in circuit.
Beneath the terminal cover is found the compressor relay (labeled a below), overload protector (labeled b) and the electrical terminals of the compressor motor. I've checked the 10amp mini fuse in the v fuse box. The compressor is not in constant engagement with the engine, instead, it is operated when the compressor clutch is actuated that drives the compressor shaft.
How to test the compressor clutch relay. Remove the relay from the socket. To do so, grab a lead from the batter to determine whether the clutch engages.
Turn the voltmeter gauge scale to volts and read the number. How to test the compressor relay. Is there a way to replace the ac relay?
Most modern cars have an electromagnetic clutch which is part of the compressor pulley assembly. If your ac relay is found to be faulty, they will be able to replace the ac relay if necessary. Ac compressor intermittent operation causing weakened or intermittent cooling performance.