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heater core

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Old 11-30-2011, 08:15 PM
neuma181's Avatar
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Join Date: Nov 2011
Location: hillsboro OR
Posts: 3
Default heater core
I have a 75 250 high boy. When I run the heater it sometimes makes a very loud screeching noise. I have asked a few people about it and one said I have something in the heater core and another said I have a bad bearing in the motor, I don't know which it is or how to tell, pleas reply
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