A/C blowing warm air
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A/C blowing warm air
Hello Everyone, I'm new to the forum. I own a 78 f100 with a 351m. The AC unit is blowing hot air. The compressor is turning and seems to be running ok. I had the pressures checked and that was ok. The controllers seem to be working ok as well. The hot and cold lever is moving and when I adjust to warm the air seems to get hotter. I would appreciate any advice on where else to check
Thanks,
79shortbed
Thanks,
79shortbed
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Sorry for the long delay. I just got a chance to work on the truck. I checked the ac pressures myself. The low side is ~ 45psi and ~245psi on the high side. I went ahead and added one can of freon with UV liquid. I did notice a small change in pressure but not much. I then noticed that one of the pressure lines was starting to cool and condincing. I also noticed that the temp got a little cooler but not much. I decided to verify the temp lever from cold to hot. I then noticed the cable connection to what I think is the heater core door. I desconnected it and manually moved it more towards the close possition. I did notice a big change in the cooling. I currenly have the cable disconnected and this has helped but still not cool enough. Although on highway driving it good enough. My questions is how do I adjust the cable to keep max cooling and is there any think else I can check?
78shortbed
78shortbed
Senior User
Joined: Jan 2008
Posts: 427
Likes: 1
From: Irondale, Al.
Sorry for the long delay. I just got a chance to work on the truck. I checked the ac pressures myself. The low side is ~ 45psi and ~245psi on the high side. I went ahead and added one can of freon with UV liquid. I did notice a small change in pressure but not much. I then noticed that one of the pressure lines was starting to cool and condincing. I also noticed that the temp got a little cooler but not much. I decided to verify the temp lever from cold to hot. I then noticed the cable connection to what I think is the heater core door. I desconnected it and manually moved it more towards the close possition. I did notice a big change in the cooling. I currenly have the cable disconnected and this has helped but still not cool enough. Although on highway driving it good enough. My questions is how do I adjust the cable to keep max cooling and is there any think else I can check?
78shortbed
78shortbed
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