A/C blows warm. Dealer said open circuit.....

[Jarrysworld125]

A/C started blowing warm.... dealership said open circuit between fuse box and driver's side.

Any clues?
Zero lights on the dash...

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[Gvsukids]

A/C started blowing warm.... dealership said open circuit between fuse box and driver's side.

Any clues?
Zero lights on the dash...

Under warranty?

 

[Jarrysworld125]

Under warranty?

Warranty doesn't cover the actual wiring..just the wiring inside a failed component
They told me there's open circuit between fuse box and driver's side.....but I'm not paying the dealership $165 an hour for labor.

 

[Hootbro]

There is no magic bullet fix here. I count no less than 5 fuses for the HVAC with one going to the HVAC controller (F105).

You need to verify their claim of a open between fuse box C4 connector pin A2 and the HVAC controller connector C1 pin 2 after making sure fuse F105 is good. That path goes from the fuse box through the firewall seal on the RH side to connector XY302A on the inside right side kick panel area. From there it goes to connector XY350A.

Attached is a wiring diagram and Star Case bulletin for a somewhat similar issue with the AC compressor having a open circuit but it shows the location of the connectors previously mentioned.

If electrical is not your thing, then need to find someone that it is or pay the piper to have it looked at. More than likely it is going to be at a connection point of either a pin corroded, pushed back or connector not seated fully. Broken wire would be on my short list after checking all that.

Good Luck and let us know what you find.

 

[sharpsicle]

A/C started blowing warm.... dealership said open circuit between fuse box and driver's side.

Any clues?
Zero lights on the dash...

The dealership did a diagnosis but couldn't tell you what circuit they found was open?

 

[SoCalJeeper]

I might have a fix for you. I bought my 2023 rubicon during the winter. Purchased it in Vegas and drove it home to San Diego. On the way home and while in the desert, I turned on the AC only to get warm air through it. Took it to the dealership in San Diego and they found an issue with the wiring harness. One of the pins, the pin that turns on the AC compressor had not lined up during assembly. The solution was to reseat the wiring harness which put the pin in the correct position which turned the compressor on and tada……cold air. Have not had a problem since and that was almost 3 years ago

 

[Jarrysworld125]

The dealership did a diagnosis but couldn't tell you what circuit they found was open?

The dealership did a diagnosis but couldn't tell you what circuit they found was open?

"Code p0645 A/C control circuit open. A/C clutch tested good. Fuse was good. Swapped relays, with no change. Control wire from the PCM to the fuse box. Inspected at fuse box under hood. No issue found."

From the dealership

 

[Jarrysworld125]

I might have a fix for you. I bought my 2023 rubicon during the winter. Purchased it in Vegas and drove it home to San Diego. On the way home and while in the desert, I turned on the AC only to get warm air through it. Took it to the dealership in San Diego and they found an issue with the wiring harness. One of the pins, the pin that turns on the AC compressor had not lined up during assembly. The solution was to reseat the wiring harness which put the pin in the correct position which turned the compressor on and tada……cold air. Have not had a problem since and that was almost 3 years ago

Interesting.... The compressor definitely does not kick on.

 

[Jarrysworld125]

I also noticed the outside temperature reading seems to be stuck at 66 degrees....

 

[Hootbro]

I also noticed the outside temperature reading seems to be stuck at 66 degrees....

That might be a default substituted value.

 

[red/green hawk]

Warranty doesn't cover the actual wiring..just the wiring inside a failed component
They told me there's open circuit between fuse box and driver's side.....but I'm not paying the dealership $165 an hour for labor.

What? That just sounds made up. Not you, from the dealer. If it's faulty wiring from the factory it HAS to be covered. The failed component is the truck itself! I would flesh this one out a bit more. Maybe go to a different dealership and then file a claim with corporate. Or go back to the same place and start raising a stink. That sounds like an answer some d-bag service advisor that doesn't want to get out of his chair would tell you.

 

[Hootbro]

What? That just sounds made up. Not you, from the dealer. If it's faulty wiring from the factory it HAS to be covered. The failed component is the truck itself! I would flesh this one out a bit more. Maybe go to a different dealership and then file a claim with corporate. Or go back to the same place and start raising a stink. That sounds like an answer some d-bag service advisor that doesn't want to get out of his chair would tell you.

He has a 2020 Gladiator and probably way out of any bumper to bumper warranty and powertrain would not cover it either. That leaves any extended warranty he may have purchased and those generally will not cover point to point wiring either but just the components.

 

[Jarrysworld125]

He has a 2020 Gladiator and probably way out of any bumper to bumper warranty and powertrain would not cover it either. That leaves any extended warranty he may have purchased and those generally will not cover point to point wiring either but just the components.

I'm too cheap to pay $165 an hour for labor to a stealership...
I have more trust in my '05 LJ.

 

[Hootbro]

I'm too cheap to pay $165 an hour for labor to a stealership...
I have more trust in my '05 LJ.

Any closer to figuring it out?

 

[Jarrysworld125]

N

Any closer to figuring it out?

Negative....I didn't even mess with it today. Gonna check the z fuse tomorrow just to make sure that's good, then probably just drop it off at my mechanic. It's starting to stir up old anger problems

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