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Old 02-16-2012, 04:46 AM   #1
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What Happened??

On my way to work this morning I have the heat on the 3rd notch, and then it just starts blowing cold, a few seconds later my temp gauge starts going up. after a minute temp gauge went back to normal but the heat would fade in and out of blowing warm air... Ideas?
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Old 02-16-2012, 04:59 AM   #2
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Hmm... Let's see, if it's one problem causing 2 effects I'd say you might have a thermostat getting stuck. If it gets stuck open, your heater will not work so great because your coolant temperature is dropping and that is what produces heat for your heater. If it gets stuck closed, that will cause your coolant tempature to rise thus causing the engine to overheat. But that's just my guess.
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Old 02-16-2012, 05:50 AM   #3
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Is there a way to check the thermostat? or is it just a replace me and see if that works?
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Old 02-16-2012, 06:01 AM   #4
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Re: What Happened??

just replace it
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Old 02-16-2012, 06:19 AM   #5
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Yeah, if it's sticking you're better off just replacing it and your coolant. It's not gonna cost too much.
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Old 02-16-2012, 07:39 AM   #6
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Alrite thanks
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Old 02-16-2012, 07:39 AM   #7
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Re: What Happened??

Man........ i always get here too late but is prob your thermostat.
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Old 02-16-2012, 02:17 PM   #8
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Pop your thermostat in a pot with a thermometer and boil it. See if it pops open at its temp range, then put it in some cooler water and see if it closes again. This will at least let you pinpoint if it is a sticking Tstat.
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Old 02-16-2012, 02:20 PM   #9
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Re: What Happened??

Quote:
Originally Posted by l2plagears View Post
Man........ i always get here too late but is prob your thermostat.
+1
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Old 02-16-2012, 04:00 PM   #10
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That's is a good way to check it but if you go through the trouble of pulling it out might as well just replace it there like 10 bucks and the seal is 3 bucks and then not have to worry bout it..
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Old 02-16-2012, 06:54 PM   #11
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True. Even though youd be replacing it, it's good to know if it was causing the problem. Don't want to put a new one in and new coolant to find out it wasn't the issue.
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Old 02-16-2012, 07:10 PM   #12
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That's only thing that effects both heat and temp.. heat only could be heater core or low coolant.. temp only anything on cooling system effects it ..
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Old 02-16-2012, 08:17 PM   #13
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New thermostat and shes blowin hot and runnin cool. thanks for the help guys
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