Mechanics

FORD F-250 HEATER PROBLEM

2001 Ford F-250 • 95,000 miles

Heater will not switch out of defrost. Auto hubs will not engage. Buzzing noise under the dash when the heater and fan are set to off. Acts like a vacuum problem. Heater works 4 wheel seems to work with the hubs manually locked. What's wrong and how do I fix it? F-250 diesel. Happened once before, easy fix, dealer charged $250 and no parts.
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November 3, 2012.



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