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Why does my heater only work on high on my ford f150/2004

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The main switch that u use to control apeed actually has 2 different speed relays in tbe unit..... Low......High..... When one or the other goes out .... Then that panel must be replaced...... Any thing else I can help with....I'll be around....

Posted on Nov 27, 2012

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1989 ford f350 a/c heater fan only runs on high, replaced switch ,didn,t help. thanks geo


When your heater only works on high it is usually
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