Quote:
Originally Posted by Cr from Texas
I've replaced the core piece but not the entire valve. When I restart the hot engine, I get an initial blast that feels like full hot from the heater. This slowly tapers to cold but the wait is a good 5 to 10 minutes, not seconds.
Maybe I have a bad check valve. Is this part of the valve assembly or another item?
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That doesn't sound like residual hot coolant in the heater core, that sounds like the monovalve is staying open for several minutes after restart for some reason. Try an experiment on a hot day; put on full heat then switch to AC and see how long it takes to get cold, I bet it only takes about one minute (not 5 to 10), assuming the monovalve is actually going closed.
One other thing to check, I was getting occasional hot air from the AC at one point and found that the electrical connector on the monovalve wasn't making steady contact. Try tightening those contacts and/or putting some conductive "grease" on the contacts.
06-11-2008, 08:39 AM
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