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07-23-2012, 08:37 PM
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#5 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: blown heater core
You didnt mention they checked voltages, Only the parts that were replaced, I deal with trucks with your problem all the time, Alot are trucks the "dealer" couldnt fix. A good portion of them have the temp door "overtravel" intermittently. Reading the door posistion curcuit, Anything above 4vdc on full cold I consider overtraveling.
The only reason replacing parts seems to fix it....Is because disconnecting the battery resets the HVAC control head. |
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