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International Automotive Technicians Network
Re: 97 F-800 5.9 Cummins No Heat
Posted to HD/Fleet Forum on 1/1/2006

Hi George,

I just have more questions.

1. What is the engine temperature...verified?

2. Have you verified that there is coolant flow through the heater core?

2. What is the temperature of the heater hoses...is there a temperature drop on the return?

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