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Question posted by meganstottsberry on November 24th, 2015

No Heat At Idle

I have a f350 6.0 diesel. No heat at idle, only when rpms are high. Have replaced heater core and thermostat...still not working! Help!

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Answer #1: Posted by waelsaidani1 on November 25th, 2015 8:23 AM

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waelsaidani1

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Alot of no heat at idle problems stem from failed head gaskets. You could check the in-line heater valve near the alternator to make sure its opening and flowing coolant.

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