Question about 1999 Ford F150 Regular Cab

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A/c hi the problem with my 1999 ford f150 is when the trck is stoped the a/c bloos codl air but when the truck star on motion the air became to hot and something sounds closing could be the actuador or blend door

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  • ernimex Jun 25, 2009

    but the a/c was working fine , so this just happened two weeks ago and the control on teh dash feels loose



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Sounds like your system either has too much, or too little refrigerant in it. Does not sound like the actuator at all.

Posted on Jun 25, 2009

  • its420_us Jun 26, 2009

    The situation sounds as if the pressure is too low. R-134A systems need recharged a lot more frequently than the old R-12 systems. The system blowing cold (as you stated) when stopped, or at a idle, then blows hot when you're driving, say your pressure is too low. When you drive, or bring up the engine rpm's, the system pressure drops a bit. Therefore, I would think the refrigerant pressure is too low to keep it cold.



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