I had an issue like this with my wife's Honda Accord hybrid years ago. It ended up being the thermostat which is a little aluminum cube thing somewhere near the blower motor. On her car it was an absolute bitch to get to, if I did it correctly I would have had to yank off the entire dash to replace a $50 aluminum cube. So instead I took a sawzall and cut off a couple pieces that you couldn't even see unless you got up under there and really ratcheted your neck around and looked up. And then we traded it in her vehicle 3 months later.
I’ll check that tomorrow. The screen won’t even let me change the fan speed. New blower motor was installed. I plugged it in just to check and no movement. I also got a new cabin and engine filter. A friend of mine suggested disconnecting the negative battery terminal. Not sure if they will even fix it
Hopefully this is something I can do. I’ll have to check it out. Jeep has my car to replace a harness and one I got it back the heat was not working. They are saying bring it back but want to charge me another diagnostic.
The blow motor I have comes with the resistor built inside I think. There was a piece attached to the blower.I had an issue like this with my wife's Honda Accord hybrid years ago. It ended up being the thermostat which is a little aluminum cube thing somewhere near the blower motor. On her car it was an absolute bitch to get to, if I did it correctly I would have had to yank off the entire dash to replace a $50 aluminum cube. So instead I took a sawzall and cut off a couple pieces that you couldn't even see unless you got up under there and really ratcheted your neck around and looked up. And then we traded it in her vehicle 3 months later.
Yeah Wranglers should have a thermostat in there. The thermostat is what regulates the blower motor and the temperature that it pumps out. If the thermostat goes, you won't get any air flow. There's a small little crystal fuse in the thermostat, and when that thing goes, you need to replace the whole part.
I'll see if I can't find the thermostat for a 2018 JL...
Okay so it's been a minute, it turns out it's called a blower motor resistor
Here's a video from YouTube to help you diagnose the possible issue if it is this part.
I don't know what's up with the Mopar online parts stores lately, but they have been really difficult to find the correct parts for recently. I swear it's like all of the factory images got changed to Fiat symbols, And when you search "blower motor resistor" you come up with absolutely no returns, and if you break down to "resistor" you have to sort through over 200 different options with very little indicators as to which one is the correct part, including completely different parts with different part numbers for vastly different prices which all are listed as resistor in the blower motor system. It's pretty ridiculous lately! I blame FCA!!
Maybe if it is this part that's something that Benny @AllMoparParts.com can help you with?
Yeah, if it stopped working when they had it they should diagnose no charge. I know this doesn't happen often but they should own the mistake. As others said, I would try a hard reset of the Jeep, disconnect all batteries for 10 minutes and reconnect. You might find it starts working again. If not, it may be a bad module.
I’m going to give this a shot today. I tried to get them to fix the issue but they are blaming the issue on an aftermarket screen which is bs. I took the screen out and put the oem connection on just to check with the same results. I hate going to the dealer…. Straight money grab sometimes over something simple.
