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How do I know if my AC relay is working?
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.
Can you put a relay in the wrong way?
Often seen as a quick fix, using the wrong relay for the application can cause inadvertent voltage spikes. Many of technicians have a drawer full of relays in their toolbox and use them every day. The problem is, not all relays are the same.
What are the relays in an air conditioner?
The two critical relays in a standard A/C system are the capacitor relay and the starter. The capacitor provides power to the compressor, blower motor, and exhaust fan. The starter relay transmits power from the capacitor to the compressor. If an A/C unit will not start but makes a humming noise, the capacitor is likely broken.
How does the AC relay work on a light truck?
The relay in your car or light truck’s air conditioning system controls the compressor. By using a relay, the high-current electromagnetic compressor clutch can be controlled by a low-current switch.
What happens if the AC compressor relay goes out?
Without this relay, the AC compressor will not have power and the AC system will not function. The AC compressor relay is no different then other electrical relays – its electrical contacts will eventually wear or burn out, and the relay must be replaced.
What to do if your AC relay is failing?
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 technician. If your AC relay is found to be faulty, they will be able to replace the AC relay if necessary.