Quick questions about A/C and heat
02-19-2016, 06:55 AM
#1
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Quick questions about A/C and heat
What does the relay behind the climate controls actually do?
I have an 88 p/u and that relay is missing. The truck has the A/C components, but it's all crapped out and I'm not restoring it at the moment. I am trying to get the heat hooked back up correctly. Right now it's running at high speed off an aftermarket switch installed by previous owner.
Anyway, do I need that relay for any heat functions?
I have an 88 p/u and that relay is missing. The truck has the A/C components, but it's all crapped out and I'm not restoring it at the moment. I am trying to get the heat hooked back up correctly. Right now it's running at high speed off an aftermarket switch installed by previous owner.
Anyway, do I need that relay for any heat functions?
02-19-2016, 10:32 PM
#2
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I am not sure what the relay actually does but it is needed for it to work correctly. The wiring for the climate control separates easily. I would get one from a bone yard and put it back to way the factory had it.
02-20-2016, 07:08 AM
#3
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Well, I know the heat is fully mechanical, IE the lever opens up the valve for coolant to flow into the heater core. I would guess that the relay energizes the compressor clutch for AC. I don't have AC so I'm not sure.
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