Heater control help

[Sandman4182]

Need a little heater help. I got a 98 and my fan control only works on high. I went to the doner and got another control and it does the same thing. Any ideas.

[4.3LXJ]

Your ballast resistor is shot. It is located on the blower housing below the glove box

[Carves]

X 2 on ballast resistor being the likely problem.

After you get a replacement ... remember to remove it occaisionally and clean out the rubbish it collects.

http://i1143.photobucket.com/albums/n629/carves-oz/Vehicle%20Bits/Electrical/BlowerResistor.jpg

[oderdene]

pull out resistor block and check temperature fuse, i replaced mine and still works well. Here is good write up

http://www.naxja.org/forum/showthread.php?t=1048920

[sinat]

mine works ok, but if i have it set on 3 or 4, it will blow out the selected vents, then go full blast out the windshield vent, then go back to the others like nothing happened, its almost like a cycle, any ideas?

[4.3LXJ]

Yours is a vacuum issue. Check your reservoir behind the front bumper for cracks, also the vacuum hoses.

[editedforsafety]

Very helpful. I just bought a '99 and it only blows on 4. I'll have to replace that resistor soon.

[sinat]

Yours is a vacuum issue. Check your reservoir behind the front bumper for cracks, also the vacuum hoses.

Well the reservoir wasn't the issue... it was the hardline coming up had about a 4" section missing, and someone had tried to seal it up with a thin wall rubber hose, so i got some heavy hose, zip-tied it on, and now my heater works better, and my jeep actually runs smoother and quieter.


:smiley-gen165: