Front a/c is blowing full blast cold air, but the rear is blowing pure hot even though the dials are set to blow cold. Why is it doing that and how do I fix it??
Could be low on freon, a faulty expansion valve on the rear system, or other issues. Can you tell if the rear ac lines are hot and cold ?
SOURCE: the rear a/c on my 1996 gmc suburban is blowing
the problem is in the rear expansion valve. this valve is located at the rear evaporator core. i am assuming the freon level has been checked and is ok. this is a common problem with these vehicles. hope this helps!!
SOURCE: back air blows cold air, the front blows warmer air
I recenly had the same problem on my 1999 suburban, even after I replaced the whole ac system.
The heater valve, which is under the air filter area was not closing, causing heat to be blowing over the evaporator core. I used a zip tie to keep it in the closed position, and ac went from 70 degrees to 40. I think the vacuum switch is bad, 40 dollars (dealer part). You can also pull the vacuum hose off the switch, which is on the firewall and connect it dirctly to valve and it closes the valve, but fits loosley. Use silicone around vac hose if you go this route.
SOURCE: airconditioner only blows a/c in the back not
I'm going to assume that is on both sides of the cab? I'm going to say you have an actuator problem, if it's in fact only blowing cold in the rear, and not in the front. The actuators are prone to problems on the gm product lines. Even more with a weak battery.
SOURCE: 2002 GMC Yukon blows cold air from the front, rear works fine
check you antifreeze level and make sure its full
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