AC/Heater Blower problems

JVRacer04 · Feb 4, 2005

my blower isnt working...

just put my motor back in(2 weeks ago), Jeep was sitting for 3 months

i ran direct power to the blower... fired right up, so am i missing some fuse or relay?

25amp fuse under the dash is good

my aux fan doesnt work either (when reaching temp beyond 230) but same for that... hooked direct powert to it, worked just fine

what are some areas to point me in guys? its fkn cold i need my heater

(1989 4.0L)

Yucca-Man · Feb 4, 2005

Does it work when the fan is on High? If so, it's the resistor pack for the switch, and not the fan at all

red91 · Feb 4, 2005

JVRacer04 said:
my aux fan doesnt work either (when reaching temp beyond 230) but same for that... hooked direct powert to it, worked just fine

(1989 4.0L)

when my aux fan didn't work there is in my rig (91) a Fuse in the Power box under the right side of the hood that had a realy for the Aux Fan. Replaced it and it worked alright.

JVRacer04 · Feb 5, 2005

no blower doesnt work on high...

and for the aux fan... 87-90 doesnt have the fuse block under the hood

red91 · Feb 5, 2005

JVRacer04 said:
and for the aux fan... 87-90 doesnt have the fuse block under the hood

Got to be a realy or a fuse to stop it if it works under direct power.

Pharaoh XJ · Oct 11, 2006

Yucca-Man said:
Does it work when the fan is on High? If so, it's the resistor pack for the switch, and not the fan at all

I have this problem the fan only works on high ? Is it the blower relay ? Whats the resistor pack?

tjs88xj · Oct 18, 2006

I've got the same problem with my blower motor. Stopped working on me last weekend while I was driving down a 12 mile washboard road. Resistor looks just fine, fuse is good, all connections are good. Kinda at a loss. Its an 88 by the way. 4.0 auto, no AC

tjs88xj · Oct 18, 2006

karim_gabra said:
I have this problem the fan only works on high ? Is it the blower relay ? Whats the resistor pack?

http://www.geocities.com/chmwatson/FAQs/Jeep/HVAC-fuselink_fix.html

highlandercj-7 · Nov 3, 2006

tjs88xj said:
http://www.geocities.com/chmwatson/FAQs/Jeep/HVAC-fuselink_fix.html

I have a 87 XJ and the Thermal Fuse in it was a 152'C When I went to Radio Shack they had 3 in stock the 128'C, a 144'C and a 178'C. I got the 144'C Thermal Fuse part number 270-1320 since it was the closest to the 152'C my heep came with. Price was only 1.49 It's rated at 10A, now to see if it worked. OH a side note I read this after the fact. Place a heat sink clip on the line before you soder it so the heat doesn't blow the fuse.

ChipsXJ · Dec 1, 2006

so it was the resistor pack?

Pharaoh XJ · Dec 1, 2006

you ll find it under the passenger side dash
Check this link it explains everything with photos
http://www.geocities.com/chmwatson/FAQs/Jeep/HVAC-fuselink_fix.html
dont bother reapairing it a bought a used one for 30 pounds like 5 bucks

Pharaoh XJ · Dec 1, 2006

ChipsXJ said:
so it was the resistor pack?

its a set of resesitors with different resistances that allow yow you to control the fan speed its has 3 resistors ( coils) for LOW MEDLOW MED and the HIGH mode doesnt need a resistor + a thermal fuse.

ChipsXJ · Dec 1, 2006

Turns out it is either the wiring/connector on the back of the heater control panel or the control panel itself.

I disconnected the connector and reconnected it and it worked but was a little flakey if I wiggled it.

Bottom line is that it will need to replaced later...but works now.

AC/Heater Blower problems

JVRacer04

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Yucca-Man

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red91

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JVRacer04

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red91

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Pharaoh XJ

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tjs88xj

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tjs88xj

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highlandercj-7

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ChipsXJ

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Pharaoh XJ

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ChipsXJ

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