hot air blowing from driver side vents when ac is on. what can it be

[James]

[ilya]

probably a leak somewhere int he system

try to recharge it first, and if that doesn't help, mgiht be something more serious

[molesz]

If the passenger side vents are ok. (blowing cold air) than probably the electromagnetic valves are playing tricks (dirt in them and they stuck) or some of the stepping motor in the vents.

[Hallmark]

It is set up to deliver a different amount of hot water to warm the driver's side vs. the passenger's side. That's why you have two temp controls. When it fails it fails all the way open, so it seems one side has failed.

BMA has them and they aren't very hard to install. I think they're about $180.

[Unregistered]

same thing happened to me, someone jokingly said hit the heater control valve with a hammer a few times I took them serious but it worked.It still happens so now i carry a hammer in my car and hit it a couple of times and it works..Try it..