Heater acting weird

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Jan 5, 2010

korey89

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From: South, FL

Heater acting weird

Man I hate this stupid *** truck. First time I've used the heat in about a year last night and when I stop at a light the heat would blow cold air instead of heat, once I start going again it works fine. Any ideas?

Jan 5, 2010

zabeard

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vacuum issue? possibly? that would be my first guess.

Jan 5, 2010

korey89

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From: South, FL

yeah thats what I was thinking too, I need to look. The truck idles smooth and it still switches though the different modes fine at idle so it must not be too big of a leak if thats what it is.

Jan 5, 2010

KLC

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Does the vehicle overheat? If so, then it is most likely a bad water pump impeller. If not, is the coolant low? If the system is full then you have a couple of options. Vacuum leak or restricted heater core.

Jan 5, 2010

korey89

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From: South, FL

Never overheated, coolant temp is always in the 190's I think? Coolant shouldn't be low but I'll go move my truck and check that right now.

Jan 5, 2010

korey89

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Was low on coolant, idk how I never noticed. Just topped it off and drove around and the heat gets hotter quicker and doesnt cut out anymore. Thanks for the help guys.

Jan 5, 2010

99offroadrngr

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Quote:

Originally Posted by korey89

Was low on coolant, idk how I never noticed. Just topped it off and drove around and the heat gets hotter quicker and doesnt cut out anymore. Thanks for the help guys.

dumbass

Jan 5, 2010

KLC

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From: New Mexico

Quote:

Originally Posted by korey89

Was low on coolant, idk how I never noticed. Just topped it off and drove around and the heat gets hotter quicker and doesnt cut out anymore. Thanks for the help guys.

No problem, glad it was an easy fix.

Jan 16, 2010

Ranger093

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Quote:

Originally Posted by korey89

Was low on coolant, idk how I never noticed. Just topped it off and drove around and the heat gets hotter quicker and doesnt cut out anymore. Thanks for the help guys.

Our 2008 F-350 King Ranch had that problem too lol.