Ac not working

[CSYeep]

Have a 2020 Gladiator sport, have the ac not working at all. I'm not able to turn it on with the touch screen or the buttons. I have checked all the fuses and they show good with the voltage meter. I contacted my local jeep and they want $500 and 6 days to just trouble shoot it. Don't have the $500 and its my daily driver so that's not going to work. It's also not under warranty. Searching the net and forms has been no luck sofar, anyone have any idea what I need to be checking???

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[Hootbro]

AC systems are not really something you can just wing it without getting data unless you want to shotgun a bunch of parts but you will exceed that $500 really quick.

Generally in my experience when a AC system will not turn on, it is usually due to a low freon pressure issue and/or pressure switch. You may have a freon leak and under pressure. This system use a r1234yf type freon and those quickie recharge kits in the auto parts store are way expensive like $100+ over the older r134a freon systems. Plus those kits are pretty easy to overcharge a system if you do not know what you are doing.

May want to shop a independent shop that specializes in AC systems and has the special tooling to narrow down on the problem. Modern AC systems do not lend themselves to getting by on the cheap with shade tree methods and expecting a high success rate.

 

[tysongladiator]

I can help you with a quick clutch check. I just replaced my compressor and condenser.

Invest a good Volt/Ohm meter if you don't already have one. Not just for your A/C, but also for anything you might need it for in the future as well.

Ok, for the two quick things.

1. If you have aftermarket fender liners, you can simply run a positive and negative from the battery to the clutch coil. If it clicks in, it's good. If not, it's bad. Doing that, you're bypassing fuses and relays.

2. The other way also requires you to have access to the compressor clutch coil terminals. Set your Ohm meter to 200. You should get some kind of reading across the coil terminals. If not, it's open and therefore bad.

I tried both methods with my compressor and not only would it not operate with a 12volt jumper wire, but I had no readings across the coil terminals. I got a new compressor and I was not only able to jump it but it had a reading across the coil terminals.

If you're not comfortable with doing those or you actually try those and the clutch is good, you may want to take it to a shop and let them further diagnose it.

 

[JeepCares]

Have a 2020 Gladiator sport, have the ac not working at all. I'm not able to turn it on with the touch screen or the buttons. I have checked all the fuses and they show good with the voltage meter. I contacted my local jeep and they want $500 and 6 days to just trouble shoot it. Don't have the $500 and its my daily driver so that's not going to work. It's also not under warranty. Searching the net and forms has been no luck sofar, anyone have any idea what I need to be checking???

Hi @CSYeep,

We are sorry to learn about your A/C concerns. If you decide to visit an authorized dealership and need extra support, please send us a private message with your VIN.

Blair
Jeep Cares

 

[CSYeep]

The mechanically I want to say the system works or at least it did before I had this issue the problem I have is I cannot turn the system on I can't use the defrost I can't use the fan blower anything at all . none of the switches and the cab are working to include the touch screen. Unless there's something I'm missing about how the system works

 

[tysongladiator]

The mechanically I want to say the system works or at least it did before I had this issue the problem I have is I cannot turn the system on I can't use the defrost I can't use the fan blower anything at all . none of the switches and the cab are working to include the touch screen. Unless there's something I'm missing about how the system works

Oohhh..... Now I understand. Sorry, I misunderstood your initial question.

The only thing that i can think of is to check your fuse array, canbus, or take it to the dealer or a shop.

Sorry about that!

 

[Hootbro]

The mechanically I want to say the system works or at least it did before I had this issue the problem I have is I cannot turn the system on I can't use the defrost I can't use the fan blower anything at all . none of the switches and the cab are working to include the touch screen. Unless there's something I'm missing about how the system works

Yeah, that is a lot of info that should have been in your first post. What @tysongladiator said is solid. Attached is the HVAC diagrams for both the ATC and MTC style systems as you have not stated what you have.

Basic fuses, power and ground checks are needed. If you have power and grounds going to your HVAC module, then it is pretty much looking like either a can bus issue or bad HVAC module. Higher end scan tool would be needed to see if you are having communication codes setting for the HVAC or other related modules.

 

[tysongladiator]

Yeah, that is a lot of info that should have been in your first post. What @tysongladiator is solid. Attached is the HVAC diagrams for both the ATC and MTC style systems as you have not stated what you have.

Basic fuses, power and ground checks are needed. If you have power and grounds going to your HVAC controller, then it is pretty much looking like either a can bus or bad HVAC controller. Higher end scan tool would be needed to see if you are having communication codes setting for the HVAC or other related modules.

Good advice! Scanning the system should give you some useful/helpful information. Schematics and diagrams and being able to understand them will save you a lot of headaches.

 

[CSYeep]

Thanks all will look at them and see what the scan tells me

 

[ryandoubleu]

I can help you with a quick clutch check. I just replaced my compressor and condenser.

Invest a good Volt/Ohm meter if you don't already have one. Not just for your A/C, but also for anything you might need it for in the future as well.

Ok, for the two quick things.

1. If you have aftermarket fender liners, you can simply run a positive and negative from the battery to the clutch coil. If it clicks in, it's good. If not, it's bad. Doing that, you're bypassing fuses and relays.

2. The other way also requires you to have access to the compressor clutch coil terminals. Set your Ohm meter to 200. You should get some kind of reading across the coil terminals. If not, it's open and therefore bad.

I tried both methods with my compressor and not only would it not operate with a 12volt jumper wire, but I had no readings across the coil terminals. I got a new compressor and I was not only able to jump it but it had a reading across the coil terminals.

If you're not comfortable with doing those or you actually try those and the clutch is good, you may want to take it to a shop and let them further diagnose it.

How difficult was replacing the compressor?

 

[tysongladiator]

How difficult was replacing the compressor?

It wasn't that hard at all. You're just working in a tight area. Just remove the inner fender liner and wheel and it's right there.

 

[ryandoubleu]

It wasn't that hard at all. You're just working in a tight area. Just remove the inner fender liner and wheel and it's right there.

10-4. I’m not completely sure I have a bad compressor yet. I tested the voltage at the relay in the fuse box and it only shows 8.8v difference between the switch prongs which isn’t enough to engage the clutch with a jumper. I didn’t test each prong to ground which I should have done but I don’t have any apparent electrical issues going on with my truck so I’m a little stumped at the moment.

 

[PBCounty]

OP, I see you're in FL. I know it's a long shot but if you happen to be near Palm Beach County, check out "AC Car Rosso". All they do is auto A/C and they do great work while also being very affordable.

 

[tysongladiator]

10-4. I’m not completely sure I have a bad compressor yet. I tested the voltage at the relay in the fuse box and it only shows 8.8v difference between the switch prongs which isn’t enough to engage the clutch with a jumper. I didn’t test each prong to ground which I should have done but I don’t have any apparent electrical issues going on with my truck so I’m a little stumped at the moment.

I used a jumper like you did, but I went straight to the battery and checked the compressor. I tapped into the wires going into the compressor and applied 12v straight to the clutch.

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