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Heater Control Valve...Causing Fogging Windows? 200 1990

posted by  Aye Roll on  Thu Oct 3 11:14 CST 2002
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last visit: Tue Oct 14 21:08 CST 2014
[RELATED]

If it's any help or consolation, they're pretty much ALL "on or off" heater control valves. I wish they'd regulate as well as the one in my 740...
The very late model year ones (92-93) seem to work much better - I don't know if this is because of a design change or just that they're younger.

Good luck and I hope you have no leaking heater core.
Have a pressure test done on the cooling system with the heater valve fully open- that ought to confirm a leak.
--
Rob Bareiss, New London, CT 86 244, 87 244, 88 744






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