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Old 03-02-2011, 03:30 PM   #1
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Default 97 cherokee no heat

i have a 1997 cherokee 4.0 temp is normal and no heat any ideas?
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Old 03-02-2011, 03:41 PM   #2
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Heater core went out... or your blower motor.

Do you smell antifreeze when you drive? When you turn the fan on, do you hear it running?
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Old 03-02-2011, 03:43 PM   #3
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It blows , nope dont smell antifreeze
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Old 03-02-2011, 06:24 PM   #4
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Take the two heater core hoses off at thermostat housing and take a hose and flush out core both ways until it comes out clear both ways. Blow water out, reconnect hoses start Jeep and let system cycle and top off coolant.
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Old 03-02-2011, 06:44 PM   #5
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2 suspects.

1. Clogged heater core. Common
2. Problem with the blend door, which is not allowing heat into the cab. Happens, but less common.

Verify blend door operation. If that is okay, you have a clogged heater core. I always try flushing them both ways with garden hose pressure to start with. If that is not successful, I have had luck with the CLR method. Here is a link to a video to watch on that.


I try the CLR method as a last ditch effort as replacing the heater core is a pain in the mule.
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Old 03-02-2011, 06:48 PM   #6
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how do i verify blend door operation? both hoses going in to the core are hot not really hot but hot. it is also 19 outside here

Last edited by burr269; 03-02-2011 at 07:13 PM.
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Old 03-07-2011, 06:05 AM   #7
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Fixed!
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Old 03-07-2011, 07:02 AM   #8
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Quote:
Originally Posted by burr269 View Post
Fixed!
So...What was the fix??
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Old 03-07-2011, 09:55 AM   #9
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Heater core was beyond clogged , flushed it and came out like tar!
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Old 03-07-2011, 09:39 PM   #10
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Quote:
Originally Posted by burr269 View Post
Heater core was beyond clogged , flushed it and came out like tar!

One of those nice to know things, Thanks.

Walter
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Old 03-12-2011, 08:02 PM   #11
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Cool! Glad to hear it.
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