Question about 1997 Toyota Camry

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Intermittant 1991 Corolla heater failure

The temperature gauge seems to work properly; temperature in the mid range, goes a little high in idle but has been doing that since I can remember. The temperature slider is all the way to the right but the heater will blow cold unless I am driving 45 mph +. If I stop at a light or even slow down it begins to blow cold. Last year, if I moved the temperature slider even a little bit to the left the heater would blow cold but always worked well when pegged to the right. The colder it is outside the worse the problem gets. Have already replaced termastat. I'm thinking it may be internal heater switch or relay but I'm guessing. If it is the heater switch, where is it located?

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Remove heater core hose-jus 1, and blow air into it from an air compressor...WHATOUT for coolant,...ck'/flush/replace coolant--most the time this will work...try to buy only dealer or NAPA stats..kev-mn.

Posted on Dec 10, 2008

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