Heater/Defroster
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New User
Joined: Apr 2014
Posts: 3
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From: Palmyra, VA
Heater/Defroster
My 2006 F-250 SD with 6.0 diesel has some sort of cut-out for the heater circuit, and possibly for the A/C as well. This truck was probably a fleet vehicle for the Houston Port Authority. Didn't really notice this peculularity until it got really cold outside. If I start the truck up and let it idle for 10-15 minutes the water and transmission temperature get up to the normal operating ranges but the heater/defrost circuit does not heat up. Cannot defrost the windshield. If I drive to the end of my driveway, about 600 feet, the heater/defroster starts putting out good heat. When driving, if I have to stop at a stoplight, or any other pause, with the truck still in gear, the heater output starts to cool down. I suspect that this feature was incorporated in the circuitry at the factory to prevent the driver from sitting still to keep warm. The truck MUST BE MOVING to allow heat or defrost to operate. The blower motor operates and it doesn't matter if the truck is in gear or not.
Looking for some way to defeat this condition.
Looking for some way to defeat this condition.
Laughing Gas
Joined: Jan 2007
Posts: 870
Likes: 9
From: Carbondale, CO
Coolant is at proper level? Feel the heater hoses @ the heater core. Same temp, like upper rad hose? Could be electronic blend door actuator, but not very familiar with 05 year.
These guys may be able to help.
https://www.ford-trucks.com/forums/1...-problems.html
These guys may be able to help.
https://www.ford-trucks.com/forums/1...-problems.html
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brentleedragon
1973 - 1979 F-100 & Larger F-Series Trucks
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Feb 2, 2008 01:13 AM
86BroncoGuy
1973 - 1979 F-100 & Larger F-Series Trucks
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Jan 27, 2008 08:35 PM
