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Old 10-25-2013, 03:14 PM   #1
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My heater just isnt that hot?

So ya . . My heater works. But it really just isn't that hot anymore. Fan works fine. Switches look good. I'm thinking maybe a vacuum leak???

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Old 10-25-2013, 03:29 PM   #2
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Check your heater hoses that are plumbed through your firewall on the engine side. Are both hoses hot to the touch? If only one hose is hot and the other warm, then it's time to flush out your heater core.

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Old 10-25-2013, 08:20 PM   #3
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I'm getting an awful lot of resistance when I hook up the hose and only getting a very very small output. Same to assume I've got a build up in there?
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Old 10-25-2013, 09:34 PM   #4
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Originally Posted by AbsolutCaptain View Post
I'm getting an awful lot of resistance when I hook up the hose and only getting a very very small output. Same to assume I've got a build up in there?
Yup probably. I mixed some clr, poured it into the heater core, let it sit 10 - 15 mins, then flush again...make sure to flush both directions helps to loosen things up.
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Old 10-26-2013, 11:00 AM   #5
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Yup probably. I mixed some clr, poured it into the heater core, let it sit 10 - 15 mins, then flush again...make sure to flush both directions helps to loosen things up.
did you pour the CLR directly into the heater core? Or through the hoses? Wasn't sure if CLR would eat through the rubber
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Old 10-27-2013, 01:23 AM   #6
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Wasn't a difficult fix. Thanks for all the input. A little CLR. Let it sit for 5 minutes. Flushed it til it was clear water running out

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