What does the AC clutch relay do?
The air conditioning clutch relay transfers power, like a switch, from the interior A/C controls of an automobile to the A/C compressor, engaging the compressor clutch. Checking an A/C clutch relay is a process of eliminating possible connection failures.
Will AutoZone check a relay?
AutoZone will test your car’s parts for free. We can test your car’s battery*, alternator*, starter* and voltage regulator while they’re still on your car. If voltage is not present, the relay coil is faulty. If voltage is present, continue testing.
How can you tell if a 3a fuse is blown?
Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.
How do I know if my AC clutch relay is bad?
AC compressor intermittent operation causing weakened or intermittent cooling performance. 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.
How does a dual contact clutch relay work?
Energizing the control circuit in the relay opens the contacts, shutting off the current in the load circuit. Dual-contact relays have one set of normally-open contacts, and one set of normally-closed contacts. When the relay is de-energized, current flows through the normally-closed contacts.
How much does a compressor clutch relay cost?
With that said, sometimes we get lucky and all it needs is a $15 compressor clutch relay. Will this solve your problem? If you’re lucky it will. However, you must remember that straight line logical diagnosis will always uncover the true reason the air conditioner will not blow cold air.
When does an AC compressor relay need to be replaced?
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. When the AC compressor relay has failed or is beginning to fail, it will begin to display symptoms that indicate it may be time for it to be replaced. 1. Inconsistent cooling