Question about Cars & Trucks
There are two relevant relays. One is the AC relay, turns the compressor on. The other is the AC fan relay that turns the fan on. Find the AC relay in the underhood fuse/relay block. You could pull it out and with key on, check if one terminal for the relay has power as it should. If it does, swap these two relays, then see if compressor comes on. If it still doesn't work, the dash controls will need diagnosing. There may be a fuse for it, so check for that, a blown fuse.
If it was working and just quit, it is probably a job for a shop.
Posted on Jul 26, 2013
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Posted on Jan 02, 2017
SOURCE: replacing cooling fan clutch????
Yes you need to replace what is called the Fan Viscous Coupling Unit.
Then swap over the fan blades.
Good luck !
Posted on Jan 19, 2009
the air blend door inside the heating / cooling unit that sits under the dash is probably not moving. there is an electric motor and control unit that moves the air blend door (assuming you have the electric dial or push button digital controls. some of these vehicles have a valve that shuts off the antifreeze from cycling through the heater and if it remains open then you would get "not hot" but just warm air.
Posted on Apr 26, 2009
The accy fan you are refurring to is actually the a/c consensor fan.The only time that fan operates is with the cycling of the a/c system.Verify by turning a/c on ,fan should come on & off with a/c cycles..
Posted on Oct 17, 2009
SOURCE: Replaced '03 GMC Envoy fan
The temperature switch triggers the electric clutch fan and is normally located on top of the thermostat housing. It has 2 or 3 prongs and the plug from the clutch fan connects to it, you can find it by locating the wire from the clutch fan and following it to the motor. Its a common failure point it is however not adjustable, but you might be able to get one that does not switch on when the temperature gets to a certain heat, maybe a hotter one or colder one, the best bet would be to ask main dealer if they do this type, or your one could just be faulty and need replacing hope this helps
Posted on Sep 13, 2010
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