Heater Problems - Ford Powerstroke Diesel Forum
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post #1 of 4 Old 10-27-2008, 06:31 PM Thread Starter
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Heater Problems

My heater in my truck works sometimes and sometimes it doesnt. The truck is warm enough. Sometimes when i am drivin it is hot as heck and when i stop it gets ice cold. I can hear it change from A/C to heater just not the temperature...whats up with it?

2010 F-350 FX4 Lariat
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post #2 of 4 Old 10-27-2008, 06:34 PM
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possible vacuum leak to blend door , on that model there is a white vacuum line on passnger side in front of heater box , its bad to dryrot and crack and cause a vacuum leak

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post #3 of 4 Old 10-27-2008, 06:40 PM Thread Starter
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allowing it to work sometime and not sometimes

2010 F-350 FX4 Lariat
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post #4 of 4 Old 10-27-2008, 06:51 PM
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possibly yes , just a starting point , no heaer control valve , all dash components are vacuum operated for heat or cold , so id start checking for a vacuum leak

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