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Heater acting weird

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Old 01-05-2010
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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?
 
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Old 01-05-2010
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vacuum issue? possibly? that would be my first guess.
 
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Old 01-05-2010
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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.
 
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Old 01-05-2010
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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.
 
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Old 01-05-2010
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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.
 
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Old 01-05-2010
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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.
 
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Old 01-05-2010
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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
 
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Old 01-05-2010
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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.
 
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Old 01-16-2010
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Ha
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.
 
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Old 01-16-2010
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Heat dont work worth a shit with low coolant eh LOL.
 
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Old 01-22-2010
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if i were you, id flush the system too. should be flushed every 5 years but i dont know that many people that do it that often.
 
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Old 01-22-2010
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flush the system and replace the thermostat and cap. and keep an eye on it for loosing coolant
 
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