Originally Posted by
onehundred80
I am guessing that the valve that lets the water through to the heater core gets stuck at times. This valve opens and closes and the frequency depends on what temperature the setting is at. There is one valve each for the driver and passenger side, so that may be the cause.
Why just one vent is a question though.
The valves I am talking about are twin silver covered valves with rubber hoses to them beside the battery and module box.
The problem valve would be hot when the problem is occurring, so put your hand on it and see which valve it is. It should be the one closest to the driver side of the car.
Graphite Ghost knows more about the heater valves but he has been absent here lately.
Oh, I will have my husband try that, thank you!!! The little vent on the left of the driver side gets warm, but not burning hot like the right one. Maybe more air is going to that vent.
Is this valve something that can be changed or fixed at home? With the Summer upon us and the rain here in FL, lowering the windows is not always an option. I would love to get this fixed without the horrible expense.
Thanks again for the info!