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International Automotive Technicians Network
Re: Repeat heater core failure
Posted to HD/Fleet Forum on 4/18/2018

Hi Martin,

1. Use a chemical to flush the cooling system for about 15 minutes. 2. Add a braided ground strap to the heater using conductive epoxy and the other end going to a good ground. 3. make sure that you use a fresh 50/50 mixture of coolant.

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