sp33d

Ok, my heat stops working if my car is idling. As soon as i start driving it kicks back on but this is a pain in the *** because my car wont defrost in the morning.

Also if my car sits idle for awhile it starts to over heat, like in the red but the car is actually not over heating. Again as soon as i start driving the Temp goes back down to normal.

Any Ideas? I was thinking thermostat but before i freeze my *** off changing parts i thought i would ask.

JSM1284

When you say it stops working, Are you saying the air blowing out of the vents is no longer hot, but cold? Or does it stop blowing out of the vents completely?

The overheat concern, Are the radiator fans coming on?

sp33d

The car stops producing heat, blower still pushing air.

As far as i know the fans are running Ill check tonight, aren't the fans on a 97 Lexus driven by transmission fluid with a clutch system?

JSM1284

They should be electric on a 97. This isnt making much sense. The guage says its hot at idle, yet the heater gets cold at idle. Since the heat comes from the coolant, it should be the opposite.... Hmmm.

sp33d

yeah thats basically where I am stuck at. I didn't know if this was a known problem with these cars or not.

Kyle Harty

iTrader: (17)

Have you checked the coolant level? I haven't owned this particular car but in my experience with other vehicles the heat has behaved like that when the coolants low. That'd be the first thing I'd check if you haven't, hopefully it'd be that simple.

sp33d

So the fans are working, I didn't even think of checking Anti-Freeze and to think i have was a mechanic. I'm going to throw a new thermostat in this weekend anyways, car has 160k I'm sure it wouldn't hurt.