No Heat

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Aug 13, 2003 | 01:14 PM

COhunter

Thread Starter

New User

Joined: Aug 2003

Posts: 15

Likes: 0

From: Colorado

No Heat

I've replaced the thermostat and the heater core, but I cant get my truck heater to throw out decent heat. Any idea's on what else could be wrong ?

1994 F150 4X4 4.9L

Aug 13, 2003 | 06:09 PM

HomerWinzlow

Logistics Pro

Joined: Jul 2003

Posts: 3,595

Likes: 52

From: Lawton, Oklahoma

No Heat

Is the blend door working properly? I know they used to be pretty bad about broken cables. Maybe the door isnt opening properly or is broken itself. Are the hoses hot going in and out at the firewall?

Aug 13, 2003 | 07:35 PM

bobcf

Senior User

Joined: Jun 2003

Posts: 446

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From: western pa,zelienople

No Heat

I have a 79 bronco, any time i touch the cooling system i lose heat. I switch the hoses on the heater core, that back fills any air pockets. works for mine.
Bob

Aug 14, 2003 | 11:28 AM

COhunter

Thread Starter

New User

Joined: Aug 2003

Posts: 15

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From: Colorado

No Heat

Yeah the hoses are plenty hot. Living in Colorado make's this problem really frustrating !!!!

Aug 14, 2003 | 12:21 PM

HomerWinzlow

Logistics Pro

Joined: Jul 2003

Posts: 3,595

Likes: 52

From: Lawton, Oklahoma

No Heat

If both hoses are good and hot then it must be a blend door problem. Access the area where the linkage to the blend door is and see if the cable is moving it fully both directions.