Thread: heat comming from vents

Originally Posted by ariddell

Similar issue on our 99 v8, get hot air blowing through the vents when the aircon/fan is off and it's just allowing air to flow through from outside it comes through heated.

Hit the recirc button and it stops it, run the airconditioning or even just set a low temperature on the climate control in econ mode and it cools the air/works fine and gets good and cold with aircon on.

Presume it's one of the blend motors that is stuck or incorrectly adjusted when in the off poition, but i've not bothered to try to fix it since it works fine in everything other than just when allowing air to pass through.

My symptoms are very similar to this, but recently some additional problems have arisen.

I have noticed more and more that there is a lot of mist forming on the windscreen at times when you would not expect it.
Yesterday in Victoria's wet conditions I had to run the demist function permanently to clear the mist. As soon as I turned it off it misted up straight away.

Also, I noticed my left leg was getting even hotter than normal, and when I reached down and stuck my finger up under the right side of the centre console to where it felt hottest, I burnt my finger on something (this is with the a/c running) and it came out wet.

I don't seem to be losing much coolant, but it is definately damp on the right side of the heater core area carpet which accounts for the steaming up of the windscreen.

Having not sussed this out properly, it seems to me that it is either coolant or condensation from the a/c that is not draining away.

Oddly the steam seems to come through the air that is being blown on to the windscreen when the a/c is off (even though not in demist mode).

I think I have big problems. Help, please!

biggin

I have a similar problem , warm air comes out of the right centre vent even though the temp is set lower than the left one. with the aircon on the difference in temps is very noticable. How deep are these motors and flaps. I would rather be cold in winter than hot in summer.
Cheers Dave