A/C Blows hot at stops, cold on the go? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 06-21-2014, 04:19 PM Thread Starter
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A/C Blows hot at stops, cold on the go?

So it's reaching 95* here in south texas, even my ECT/EOT are in the 200* ranges. Well the other day at a stop light, my AC started blowing hot, then went back cold when I took off. Could I just be reaching low on freon? Any tips appreciated!
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post #2 of 5 Old 06-21-2014, 06:47 PM
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Probably just your electric fan not moving enough air briefly across the condenser. Which makes the high side heat up then the compressor kicks out.


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post #3 of 5 Old 06-27-2014, 06:47 PM
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Learned something about that fan today. If it's too low on freon it won't engage the fan properly. Had a truck that was low on freon and the fan wouldn't engage at an idle like it should making the high side peg out and kick the compressor off. Added some freon and it works properly now. Hope this helps

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post #4 of 5 Old 06-27-2014, 08:33 PM
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^^^^^That's what I had to do with mine. I got the pressures right and now you can hang meat in the back of that truck!

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post #5 of 5 Old 06-28-2014, 06:58 AM
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low on freaon and maybe your condesor need to be washed out as well as the other coolers if you are in alot of sand dusty roads. you might be getting just alittle bit of restrition of air flow because your all your coolers are getting plugged up.
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