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Posted by Jeff Cunningham (more from Jeff Cunningham) on Tue, 28 Jan 2003 10:25:21 Share Post by Email
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My 1985 C900 is doing something I have never experienced. I'm guessing thermostat, but I'm throwing this out just to get other opinions.

So far this has only happened when it's been very cold outside.
The car warms up and the gauge is in the low green. There is absolutly NO heat coming out of the vents. It's ice cold.
Then the temp gauge rises up to the red, where I shut off the engine and start looking around the engine bay.
Still no heat at all. There is plenty of antifreeze in the resevoir.
The hose going into the heater core is hot, the hose coming out of the heater core is ice cold.
The hose coming out of the thermostat is warm, but is cold after the A/C temp sensor. (Plugged up maybe?)
Finally after 5 minutes of squeezing hoses, I take off down the highway and the temp gauges drops to mid-green and stays there until the next morning.

I would think that I would get heat even if the thermostat was plugged up, but I'm not. I thought that if the heater core valve was closed or clogged, the antifreeze would just make a loop. If that was the case, both hoses would be hot. In my case, only the top hose is hot.

posted by 168.159.7...

Jeff & Royce's SAAB Extravaganza

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