thermostat failure... - Toyota Nation Forum : Toyota Car and Truck Forums

***Edmond*** · 11-12-2004, 11:49 PM

what are the common signs of a failed/failing thermostat?

Will the motor start to overheat?

Will I still get heat?

amerikim · 11-12-2004, 11:53 PM

Failed thermostat..hmmm..
If stuck closed, you notice overheating...touch the radiator - it will be cold.
If stuck open, your car takes forever to warm up, when you drive, the temp falls and when you stop, it climbs.

***Edmond*** · 11-12-2004, 11:58 PM

Quote:

Originally posted by amerikim
Failed thermostat..hmmm..
If stuck closed, you notice overheating...touch the radiator - it will be cold.
If stuck open, your car takes forever to warm up, when you drive, the temp falls and when you stop, it climbs.

Thanks for the quick response. I don't have either of those problems so I guess my thermostat is okay.

My heat doesn't work, it just blows cold air out. Any suggestions on where to look?

amerikim · 11-13-2004, 12:13 AM

Check your swiches especially if they are electric, switches at the firewall that allow hot water into the heat exchanger. Buya Haynes Manual at this part so you do not get lost.
Could also be crap stuck in there, so high pressure hose, blow it out.

userlain · 11-13-2004, 12:32 AM

A failed thermostat would cause your engine temp gauge in your instrument cluster to not work at all.

If it doesn't check all the fuses.

88 LE · 11-13-2004, 01:13 AM

Quote:

Originally posted by userlain
A failed thermostat would cause your engine temp gauge in your instrument cluster to not work at all.

Wrong.

Theres a sensor for the temp guage. It has nothing to do with the thermostat.

es250nut · 11-13-2004, 01:26 AM

Ok there is some confusion here. These guys are assuming you are asking about the thermostat in the motor. I would bet you are referring to the tempature control for your interior heater. Do a search on "Climate Control" that will get you the answers you are looking for. There is a thread about both the electronic and cable climate controls to your HVAC system that would more than likely help.

profuse007 · 11-13-2004, 10:25 AM

check the radiator/heater core valve linkage. or you could manually open and close the passage from the radiator to the heater core from teh engine bay, locate at the firewall.

userlain · 11-13-2004, 02:06 PM

Quote:

Originally posted by 88 LE
Wrong.

Theres a sensor for the temp guage. It has nothing to do with the thermostat.

Snap.

***Edmond*** · 11-13-2004, 02:46 PM

where is the heater core at and what does it look like?

Sorry but I'm Toyota stupid.

88 LE · 11-13-2004, 05:14 PM

^ The heater core is inside the car.

It looks like a little radiator.

This valve connects to it: