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Old 12-08-2017, 11:35 AM   #1
Kurdawg
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So whenever I turn on my truck heater it does not blow hot. Also it cools the temperature of the truck of from 1/2 of the gauge 210 to 1/4 of normal operating temperature. Turn heater off truck warms back up, turn heater on it cools off and just barely warm air. Normally not an issue but this morning it was chilly on the way to work and with the snow I couldn't get the windshield to defog either. I'm thinking the thermostat is stuck open. What do yall think?
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Old 12-08-2017, 11:44 AM   #2
Ironman
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What make and year?
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Old 12-08-2017, 11:44 AM   #3
Kurdawg
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What make and year?
2006 chevrolet 1500 5.3 V8
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Old 12-08-2017, 11:45 AM   #4
CabezaBlanca
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Sounds like your blend door is not operating correctly.
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Old 12-08-2017, 11:51 AM   #5
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Originally Posted by CabezaBlanca View Post
Sounds like your blend door is not operating correctly.
But that shouldnt cause the truck temp to drop in half huh?
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Old 12-08-2017, 11:54 AM   #6
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You wouldn't think so but it happens.
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Old 12-08-2017, 11:56 AM   #7
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Have you checked your coolant level?
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Old 12-08-2017, 12:03 PM   #8
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When you turn it to defrost the AC compressor kicks on. When the blend door isn't working correctly you're blowing cold air across the heater core. Which in turn cools the water running through it. Which in turn cools your motor down.
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Old 12-08-2017, 12:31 PM   #9
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.
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Old 12-08-2017, 12:33 PM   #10
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Doesn't sound like a thermostat.
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Old 12-08-2017, 12:34 PM   #11
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Quote:
Originally Posted by CabezaBlanca View Post
When you turn it to defrost the AC compressor kicks on. When the blend door isn't working correctly you're blowing cold air across the heater core. Which in turn cools the water running through it. Which in turn cools your motor down.
K but it cools off even when blowing heater thru vents and not the Defrost.
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Old 12-08-2017, 12:36 PM   #12
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Have you checked your coolant level?
yes full
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Old 12-08-2017, 12:41 PM   #13
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Quote:
Originally Posted by CabezaBlanca View Post
When you turn it to defrost the AC compressor kicks on. When the blend door isn't working correctly you're blowing cold air across the heater core. Which in turn cools the water running through it. Which in turn cools your motor down.
THis or some variant of it. Maybe fresh air door stuck open, but something cooling the air that goes over the heater coil.
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Old 12-08-2017, 12:57 PM   #14
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Well its 40 below and I don't give a ****, gotta heater in the truck and I'm off to the rodeo! This post has nothing to do with your issue. I just couldn't help myself.
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Old 12-08-2017, 01:08 PM   #15
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You should be carrying a Little Buddy heater with you till you get it figured out.
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Old 12-08-2017, 01:19 PM   #16
Kurdawg
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You should be carrying a Little Buddy heater with you till you get it figured out.
Lol I'm going to try and turn off the A/C compressor, I never push the button that turns it off just adjust the heat and see if this helps on way home. Supposed to be pretty cold on the way to work in the A.M.
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Old 12-08-2017, 01:21 PM   #17
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Lol I'm going to try and turn off the A/C compressor, I never push the button that turns it off just adjust the heat and see if this helps on way home. Supposed to be pretty cold on the way to work in the A.M.
You should be able to unplug it right at the compressor.
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Old 12-08-2017, 01:22 PM   #18
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Quote:
Originally Posted by Txjourneyman View Post
Well its 40 below and I don't give a ****, gotta heater in the truck and I'm off to the rodeo! This post has nothing to do with your issue. I just couldn't help myself.
That brings back some memories.
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