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Old 07-12-2013, 07:17 PM   #1
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Dash AC very warm

My dash A/C (Evans) is putting out warm air (90 degrees). I checked the hoses on both sides of the Evans control valve. Both hoses are very warm. The hose on the right side is hotter. Does this mean that the valve is leaking and should be replaced? I replaced this valve about 2 years ago. But like anything else I guess they can go bad again. The compressor is continue running.
Thanks .............
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Old 07-12-2013, 08:30 PM   #2
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Have you checked the freon state of charge?
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Old 07-13-2013, 06:02 AM   #3
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Quote:
Originally Posted by TXredfish View Post
My dash A/C (Evans) is putting out warm air (90 degrees). I checked the hoses on both sides of the Evans control valve. Both hoses are very warm. The hose on the right side is hotter. Does this mean that the valve is leaking and should be replaced? I replaced this valve about 2 years ago. But like anything else I guess they can go bad again. The compressor is continue running.
Thanks .............
Try pinching the hose with vicegrips (use electrical tape or Popsicle sticks on jaws to prevent hose damage).

If cooling improves, the valve has failed.

Lots of folks installed a ball valve in line to shut off water.
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Old 07-13-2013, 08:49 AM   #4
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Bruce.. Best diagnostic idea I have seen to date.

And by the way what I'd suggest to the O/P as well.

Clamp off the heater hose (Using protection as noted) and see if that helps.
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Old 07-13-2013, 10:12 PM   #5
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If you replace the Evans valve, read this thread, you need to be sure you position the valve in the correct port into the Evans AC/Heater coil unit, or your new valve will fail as the old one did.
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Old 07-20-2013, 05:09 PM   #6
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Found the problem. It was low on on freon. Added about a 1.5 lbs and now it is working fine. Thanks for your help.............
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Old 07-20-2013, 06:24 PM   #7
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If both hoses are warm on either side of the EVANS then it would seem some coolant is getting thru to the heat exchanger. I installed a $8 Lowe's ball valve. You can see my EVANS valve above. It hasn't totally failed...but both hoses being warm indicate unwanted hot coolant circulation.
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