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Nothing but heat?

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Old Jun 9, 2009 | 12:13 AM
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Nothing but heat?

First of all I've read a ton of stuff that I've searched through here on this forum, but there seems that I could have one or two of many issues so I thought I would post my own thread.

I get hot air all the time in my 99 F250. Even when the blower motor is on the OFF position, it gets stupid hot in the cab. A/C also blows hot. I pulled the glove box and the heater core panel and I can see the blend door opening and closing so I'm not sure what the deal is. Something plugged, vaccuum leak or in a part in need of replacement?

Also, when the blower motor is on DEFROST or FLOOR position, I get airflow, but when I put it on the dash vent position I get very little to no airflow.

I've also read a lot of info on the shut off valve trick for the A/C and everyone seems to be happy with it, but does it affect how the heat works?
 
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Old Jun 9, 2009 | 08:09 AM
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Anybody?
 
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Old Jun 9, 2009 | 08:21 AM
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I was going to suggest door blend acctuator, but you mentioned its working. Have you had your a/c serviced?
 
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Old Jun 9, 2009 | 08:36 AM
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Originally Posted by 03_PSD
I was going to suggest door blend acctuator, but you mentioned its working. Have you had your a/c serviced?
No I haven't....I was hoping it would be something that I could take care of myself before taking it in.
 
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Old Jul 31, 2011 | 10:42 AM
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Same problem

S there any answers to this. My a/c is fully charged and is working but I have heat blowing in my cab all the time. Any suggestions
 
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Old Jul 31, 2011 | 12:18 PM
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High and low side pressures should be checked so you're not chasing after a nonexistent problem.

Here's the vac schematic for manual HVAC for diagnosing circulation problems.

 
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Old Mar 30, 2023 | 08:04 PM
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great frigging post @PaysonPSD even if it was 15 years ago
 
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