Thread: cooling fan runs constantly, a/c blows warm.
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Old Jul 11, 2016 | 05:24 PM
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onehundred80
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From: Ontario
Default Re: cooling fan runs constantly, a/c blows warm.
Originally Posted by pizzaguy
What pressures did you see in the system before and after your 'recharge'?

Keep in mind that MOST of the time the A/C blows warm/hot air, the A/C is fine and the duovavle is either stuck, or the connector is corroded, which means maximum coolant flows in the heater core - giving you, yes, hot air!

Sounds to me like you goofed here, in charging a system that did not need it.

And if the system DID leak down, you should be looking for the leak BEFORE you recharge. But I've driven several vehicles over 200,000 miles and NOT ONCE have I EVER recharged an A/C system. And yes, they all worked to well past 200,000.

But getting to your point....
If the engine fan is running full speed, then:
There are two valves, each sending heat to the drivers side or the passenger side, and both getting stuck at the same time would be a coincidence.
There have been few AC failures mentioned here so I tend to doubt the symptoms have been read correctly.
Does he mean the rad fan or the heater fan?
 
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