JBrake
New Member
Has anyone else had trouble with a/c resistors blowing. I'm on number 5 in six months
A/C Resistor trouble
- Thread starter JBrake
- Start date
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Billwill
Full Access Member
What's an AC Resistor?
Are you referring to the Resistor Block that controls the speed of the interior fan...hot or cold!
Are you referring to the Resistor Block that controls the speed of the interior fan...hot or cold!
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JBrake
New Member
Yes
JBrake
New Member
Yes
JeepJeepster
Full Access Member
Im still on my factory unit. Wonder if something is wrong with your fan motor? I do have the sebring mopar unit on the shelf. Have you tried that unit?
JBrake
New Member
No, It's under warranty so they have been free replacement but I'm sure O'Reily is going to stop handing them out soon. It's more of a hassle at this point.
JBrake
New Member
There does seem to be a loose connection or issue with the wiring harness. I occasionally have to wiggle the harness to get the fan to start.
I burned out two in three years and decided to go ahead and replace the blower. The unit I took out took much more effort to turn by hand than its replacement which spun easily. My guess is that it pulled more amps than the resistor could handle.
Billwill
Full Access Member
Yeah I am still on my original Resistor block on my 2002 Export CRD.
You could have a fan busy seizing up or with an internal fault or the leads going to the fan motor could be shorting to chassis intermittently.
You need to physically trace the wiring and check the fan motor is moving freely.
There is a more robust Resistor block available but more likely a wiring issue or bad motor.
You could have a fan busy seizing up or with an internal fault or the leads going to the fan motor could be shorting to chassis intermittently.
You need to physically trace the wiring and check the fan motor is moving freely.
There is a more robust Resistor block available but more likely a wiring issue or bad motor.
profdlp
Fired
(I am sorry that this is not as helpful as it 'could" be. If I find the answer I will update this.)
The stock Liberty resistor pack was known to be problematic. Some users here replaced it with a drop-in resistor pack made for another brand and model altogether which seems to be more robust. Mine has never failed so I can't recall what the brand and model is. Hopefully I will find it or someone else with a better memory than mine will see this.
The stock Liberty resistor pack was known to be problematic. Some users here replaced it with a drop-in resistor pack made for another brand and model altogether which seems to be more robust. Mine has never failed so I can't recall what the brand and model is. Hopefully I will find it or someone else with a better memory than mine will see this.
I want to say it's a Chrysler Sebring, but don't quote me. My thought has always been why would you want a more robust resister? Why not address the problem directly with either the wiring or the fan blower motor?
profdlp
Fired
Dave - that is it. 
As for why, the people who have had problems felt like the stock resistors were not up to *****. Having never had the issue myself I have no opinion on the matter. My Jeep will turn 15 next months and mine is still going strong. (Knock wood.)
As for why, the people who have had problems felt like the stock resistors were not up to *****. Having never had the issue myself I have no opinion on the matter. My Jeep will turn 15 next months and mine is still going strong. (Knock wood.)
profdlp
Fired
The "bad" word I used was $nuff, as in the smokeless tobacco people dip or snort up their nose. Glad we are protected so well here...
Billwill
Full Access Member
My Jeep is coming up to 20 years old and still has its original Resistor pack. However lots of owners have had the original resistor pack give up on them and the upgraded..ex Sebring .... resistor pack works well for them.
Something may have changed in the motor design over the years which causes the newer KJs to go through the original resistor packs more rapidly as apposed to earlier Jeeps.
No harm in fitting a larger rated resistor pack....will not run as hot as the original and hence less of a fire hazard!
LibertyTC knows where to source the better resistor pack!
On my 2002 Export 2.5 CRD I have replaced:
One turbo hose.
Clutch two or three times.
Front and rear brakes.
Timing Belt and Serpentine belt about three times due to age.
Tires.
More powerful front light bulbs.
All lubricants, oil and air filters.
Hood and rear window lifters.
Battery a few times.
Clockspring.
Fixed a lot of wiring problems after GF pranged into a tree.
I think they made the first KJs a lot tougher than later ones!
Something may have changed in the motor design over the years which causes the newer KJs to go through the original resistor packs more rapidly as apposed to earlier Jeeps.
No harm in fitting a larger rated resistor pack....will not run as hot as the original and hence less of a fire hazard!
LibertyTC knows where to source the better resistor pack!
On my 2002 Export 2.5 CRD I have replaced:
One turbo hose.
Clutch two or three times.
Front and rear brakes.
Timing Belt and Serpentine belt about three times due to age.
Tires.
More powerful front light bulbs.
All lubricants, oil and air filters.
Hood and rear window lifters.
Battery a few times.
Clockspring.
Fixed a lot of wiring problems after GF pranged into a tree.
I think they made the first KJs a lot tougher than later ones!
You don't want to leave the kids astray!
I have 2006 jeep liberty and had the same problem. I changed the blower motor and the fuses and have not had a problem since.
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Personally I think it's bad design that can lead to failure. The lowest setting "1" means that all of the resistors on the pack are engaged to limit current to the motor so it runs slower. Consequently a lot of heat builds up in the resistor pack, coupled with not much air moving over it to cool it, will lead to failure. There is also no way to turn off the fan with the speed control ****, you have to use the "mode" **** and to be honest I would never bother. If you run your fan on the lowest setting a lot I think you'll experience a failure. I removed the lead from the resistor pack connector for the lowest setting, so now position 1 is "off", solving hopefully three problems at once.
<edit>
Uhhh, **** = kn0b
<edit>
Uhhh, **** = kn0b
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JeepinJarhead03
Full Access Member
The upgrade blower motor resistor was bwd ru1040 , the original bmrs didn't have enough heat sinking and had inadequate potting, which was the root of the bmrs burning out which usually happened during winter months when users wanted heat but had already gotten the cabin comfortable and were just trying to maintain temp using a lower speed setting, speed 4 is a resistor pack bypass so folks who pretty much always operate on speed 4 or off as an all or nothing sort of deal, rarely ever had problems
SkyJeep
New Member
The 1 position on my 2006 failed. On another thread someone recommended this from amazon: https://www.amazon.com/gp/product/B07DLMF29P/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1
It works great, no mods needed at all. I have all four speeds back now.
It works great, no mods needed at all. I have all four speeds back now.
