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Car heater blows cool air after 30 min Turn it up a little and blows hot air again only to go cool after about 5 min Heater will only maintain hot air if maxed out on hottest setting WH?
Wiki User
∙ 16y ago
Hi, Same person who asked question, let me re-ask.
Some facts first.
Bought car in summer, so never tried heat till now. Dont know if I bought this car with an existing problem.
Had leaky heater core, replaced heater core O-rings almost after buying car, never used heat before then.
Dont know if heater core leaked onto ECM, located directly under Heater Core
I drive to work with the heat on 80. About 30 min later, the heat cuts out and blows cool air. I'll turn the heat up incrementally to which the heat comes back on, but only for a few minutes, and goes cold again. The only way I will have constant heat is if I max the heat out on 90. If I turn it down to 89, it will blow cool again. Please help.
Wiki User
∙ 16y ago
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