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2017 Super Duty With No Heat

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Keith Browning
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Keith Browning

Keith Browning

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We have seen 4 of these in the last month coming in with no heat and two more scheduled to come in. We have found that replacing the heater box is fixing them. For some reason the blend door is binding. Oddly though if you remove the blend door actuator the door can be moved by hand and comparing it to the new part you don't seem to feel any difference. We have now seen this with regular HVAC and ones with supplemental heat.

If you see this DTC in the FCIM the heater box assembly is suspect:

B1081:07-2A- (FCIM) - Left Temperature Damper Motor - Mechanical Failures - Current (DTC),Fault is currently present.
 

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