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Old 03-06-2013, 06:29 AM
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heater problem

Okay when the truck is at a stop the heater will start to blow cold air once i start moving or get rpm up it will blow hot air again. Anyone know?
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Old 03-06-2013, 06:47 AM
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Is your coolant low?
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Old 03-06-2013, 06:51 AM
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^yup... bet you've got a bubble and need a burp, at best, or have a leaking heater core or somewhere else air is being introduced, at worst.
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Old 03-06-2013, 07:09 AM
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Well f i fill it the coolant comes out of cap. I.did a coolant flush last spring. I didnt have this problem tell a few weeks ago
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Old 03-06-2013, 07:10 AM
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You have bad head gaskets right? I have seen posts stating that will cause problems with the heater.
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Old 03-06-2013, 07:14 AM
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I think i goung to replace either way
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Old 03-06-2013, 07:15 AM
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Well you stated above that coolant comes out of the cap so you probably have bad head gaskets.
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Old 03-06-2013, 08:03 AM
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Wouldn't temps be weird if it was head gaskets?
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