hey guys. I was power washing the undercarriage of my ls (I do this once a year in the fall) to remove all the dirt and debris. It is nice and clean.

Suddenly I dont have any heat in the car. If i set it to the AUTO climate control setting and put the temp up to MAX HOT I dont get any air flow. If I manually set it to MAX HOT and set the air flow to HI, I get full air but no hot air. Is this a coincidence, or could I have messed something up that controls the heater during my power washing adventure???

 

Maybe your thermostat or your heater control valve got stuck. Or you are low on coolant. It seems like a lot of people on this board are getting no heat.

 

It turns out that when I flushed my transmission fluid using the method where you disconnect the hose to the radiator, I must have lost some coolant during the procedure. All I needed was to add about 1/2 gallon of fluid and I've got my heater working again. Yes I feel like a tool! sorry...