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Dec 11, 2012 | 08:31 PM

worleyburd

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Seasoned Member

Joined: Aug 2012

Posts: 288

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From: Amarillo, Texas

Year: 1992

Model: Cherokee

Engine: 4.0I

Heater

If the heater is warmer coming from the foot compartment than from the vents is my blend door not working right?

Dec 11, 2012 | 08:50 PM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Maybe. Poke your noggin undeer the passenger side dash and move the Cold>Hot slide on the control. See that cable moving? Is it traveling all the way to the stop?

Dec 17, 2012 | 03:49 AM

worleyburd

Thread Starter

Seasoned Member

Joined: Aug 2012

Posts: 288

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From: Amarillo, Texas

Year: 1992

Model: Cherokee

Engine: 4.0I

Blend door is fine, both tunes are warm to the touch, does they mean I just need to flush or?

Dec 17, 2012 | 05:36 AM

cruiser54

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Posts: 43,971

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From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by worleyburd

Blend door is fine, both tunes are warm to the touch, does they mean I just need to flush or?

What are tunes?

Both of the heater hoses in the engine bay, at the firewall, need to be real close to the temp of the radiator hoses when the engine is completely warmed up.

Dec 17, 2012 | 10:26 AM

djb383

CF Veteran

Joined: Nov 2009

Posts: 8,172

Likes: 17

From: The Republic of TEXAS

Year: 1998

Model: Cherokee

Engine: 4.0L HO

Quote:

Originally Posted by worleyburd

If the heater is warmer coming from the foot compartment than from the vents is my blend door not working right?

I believe the floor vents are the closest vents to the heater core. The outlets/vents farther away from the heater core will have slightly cooler air. Heater performance is tested at the floor vents.

Dec 18, 2012 | 05:21 PM

worleyburd

Thread Starter

Seasoned Member

Joined: Aug 2012

Posts: 288

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From: Amarillo, Texas

Year: 1992

Model: Cherokee

Engine: 4.0I

How do I get the tubes to the heater core off? Dam things are on there good

Dec 18, 2012 | 05:21 PM

cruiser54

::CF Moderator::

Joined: Aug 2011

Posts: 43,971

Likes: 1,578

From: Prescott, Az

Year: 1990

Model: Cherokee (XJ)

Engine: 4.0

Quote:

Originally Posted by worleyburd

How do I get the tubes to the heater core off? Dam things are on there good

You mean the hoses?

Heater

Heater

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