The a/c blows hot air! but if I put it on max a/c it blows cold/air why?
SOURCE: Temperature Control not working on 1999 Ford Explorer
Sounds like your temperature actuator is not moving or your temp door is broken. On max a-c ,coolant is shut off to your heater core allowing only cold air in.
SOURCE: 1998 ford ranger ac only works below 45 mph blows hot at higher
I would say that this problem is caused be a vaccum leak. Ford was known for using vaccum in their heat/ac systems....and you loose vaccum as you press the accellerator.
I had this issue with a Grand Marquis....and was a pain to find the leak.
You really need to look over all the vaccum lines that run under the dash.
Ross
SOURCE: 05 ford ranger 3.0......if I put my thermostat on
Cold air like, really cold or just cool. Sounds like your hot/cold blend door motor has perhaps failed with the blend door in the semi hot position. Blend door motor failure is very common on the Ford truck HVAC systems. Is is located behind the glovebox on top of the HVAC housing assembly.
SOURCE: heater blowes cold air in 2008 ford ranger
air trapped in cooling system. need to burp it out.
SOURCE: 2008 ford ranger heater only
08 Ford Ranger 4.0 same problem but it is vacum not electric no vacum on hose in cold or hot position thought maybe valve but that's not the problem . There is no vacume to make valve work:(:(
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