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Discussion Starter · #1 ·
2001 Nissan Quest

With a warmed up engine, I get no heat at idle, but if I go above 2000 rpm or so it is then fine. Typical situation is while driving along everything is fine then at stop light heat disappears.

I have checked the coolant levels, and condition, evderything is fine there. I had read it could be the termostat sticking, so I replaced it (not a fun job if you ever have to do it). Problem still exists. Could it be a bad or sticking heater control valve, where the heck is it??

Please help, need heat even at stop lights and when warming up the vehicle in the mornings

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