Heater/AC blowing hot air at 60 or higher

[cecaa850]

I believe it's just introducing outside air periodically but you think that they could do that by staying in the ac mode and just letting outside air go through the evaporator. At least it wouldn't be warm then. Automotive ac units should never have to "defrost" or "thaw". The evaporator should never be colder that 32 degrees. If it is, either it's low on freon or the evap temp sensor is defective.

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[ShadowsPapa]

I believe it's just introducing outside air periodically but you think that they could do that by staying in the ac mode and just letting outside air go through the evaporator. At least it wouldn't be warm then. Automotive ac units should never have to "defrost" or "thaw". The evaporator should never be colder that 32 degrees. If it is, either it's low on freon or the evap temp sensor is defective.

It's always outside air going through unless you have it set to inside only.
And yeah, evaporators have frozen up for decades, it was an issue in the 60s and can continue to today. It's not that the evap gets to 32, it's the air speeding up and evaporating the moisture that freezes things up. It's like how carburetors used to freeze up and lock throttles solid - when the outside temp was 37 degrees.
Now maybe THESE are different (of course they don't use Freon® since the early 90s) and maybe they have a sensor touching the evaporator to sense the temp of that unit, but we'd get 34-35 degree air out the dash vents as a matter of routine when I did auto A/C work. To do that, the evaporator has to be colder than 34.
Another way you can tell there's frost on them is when you shut things off and the drip drip turns into almost a stream after a few minutes............ the frost melts.
I can't speak to this model, but yes, the evaporator did used to get to 32 degrees in other systems.
Some had a setting they warned you not to use unless in a desert type setting - very low humidity.

 

[cecaa850]

Freon is easier to type than R1234YF. I use it as a generic term for refrigerant gas. I say Skill saw instead of circular saw, Band aid instead of bandage and Channel Locks instead of straight jaw tongue and groove pliers. I'm lazy.

Any time an evaporator gets to 32 or so it's subject to freeze up. Evap temp sensors are used to prevent this by reporting to the pcm and/or HVAC module. I'm not aware of any of the current CDJR models that will allow evap temps below freezing.

 

[ShadowsPapa]

Freon is easier to type than R1234YF. I use it as a generic term for refrigerant gas. I say Skill saw instead of circular saw, Band aid instead of bandage and Channel Locks instead of straight jaw tongue and groove pliers. I'm lazy.

Any time an evaporator gets to 32 or so it's subject to freeze up. Evap temp sensors are used to prevent this by reporting to the pcm and/or HVAC module. I'm not aware of any of the current CDJR models that will allow evap temps below freezing.

Mine is a Porter-Cable circular saw - try typing that out each time LOL

 

[Deleted member 20081]

So today I got back my truck after two days. Jeep Cares expidited my service that I first reported to them this summer. I haven’t had the time with COVID to get my vehicle worked on nor the desire to expose myself or my truck. I used the dealer where I got my truck Safford Jeep of Warrenton. They did not find any problem. But didn’t send me my invoice or explain it to me in person only via email after I got home. They did not write down what I described nor what Jeep Cares also responded to. They only wrote to the technician that the Jeep wouldn’t cool down. Wrong wrong wrong. Nothing about that is correct. The JT cools down for a period of time and then waves of heat happen and then it cools down again. It’s a cycle of heat cool heat cool. Also when I got the truck back they had the ac set at 85. Seriously!?!? The outside air this time of year in VA is where I normally keep my ac all year 72 degrees. And today was no different. I am so disappointed and annoyed. It is one of the reasons I only have 6600 miles on the truck. And the other reason is the steering wobble. That they say is on order but they can only get two a month and I am scheduled for December. So guess what. I value my life more than driving a vehicle with a steering issue. So it sits in the garage. Thanks a lot Safford. And Jeeps Cares also expedited my case. So I guess they didn’t get the message. Safford told me they are always getting case numbers..........

 

[Highway61]

Just took delivery of our 2020 Gladiator last week and absolutely love it!

Has anyone had issues with hot air blowing out at settings of 60 or higher? If we bring it to Low and begin feeling cooler air and then increase to 65 it's fine for a moment. Then, hot air begins to blow and it feels the same if we have it set at 65 or 80.

Dealer looked at it and told us no codes showed up when analyzing and that there have been no issues reported, however this doesn't seem right. They recommended we drive it for a bit and see what happens.

Any thoughts on this would be appreciated. Thanks!

We are all similarly screwed. Joys of having a first gen product I guess.

 

[Deleted member 20081]

We are all similarly screwed. Joys of having a first gen product I guess.

Yes. I got an email today sent to me by Emily of Level 2. She forwarded the stock message about it being fresh air intake. And Jeep said Do NOT replace any components. I will cut and paste it

 

[Deleted member 20081]

Yes. I got an email today sent to me by Emily of Level 2. She forwarded the stock message about it being fresh air intake. And Jeep said Do NOT replace any components. I will cut and paste it

This is the response I received:
Dear (my name),
I hope all is well, I have received the latest information on the case from my corporate resources. I just wanted to advise you of the information my corporate resources has advised.

Symptom/Vehicle Issue: Customer Indicates That They Feel Warm Bursts Of Air While Driving With A/C On.

Discussion: If you have a customer complaint where the vehicle has the A/C on but the customer is stating that they feel warm bursts of air through the vents do NOT replace components. This is a normal operation of the HVAC strategy to implement fresh air into the cabin for the customer. This characteristic is more prevalent on the hotter, most humid days where the exterior temperature is greatly different than the interior temperature of the cabin. Due to the temperature difference from outside the vehicle and inside the vehicle the customer will occasionally feel warm air when the fresh air inlet opens into the cabin.

Verification: Ensure that there are no DTC’s or HVAC faults present, drive the vehicle and operate HVAC in all ranges of motion to ensure proper operation. If everything is working as designed return the vehicle to the customer informing them of the HVAC fresh air inlet strategy.

I do hope this information helps at this time. Was there anything else at this time you needed ?

Kind Regards,

Emily
Jeep Wave Specialist

 

[ShadowsPapa]

This is the response I received:
Dear (my name),
I hope all is well, I have received the latest information on the case from my corporate resources. I just wanted to advise you of the information my corporate resources has advised.

Symptom/Vehicle Issue: Customer Indicates That They Feel Warm Bursts Of Air While Driving With A/C On.

Discussion: If you have a customer complaint where the vehicle has the A/C on but the customer is stating that they feel warm bursts of air through the vents do NOT replace components. This is a normal operation of the HVAC strategy to implement fresh air into the cabin for the customer. This characteristic is more prevalent on the hotter, most humid days where the exterior temperature is greatly different than the interior temperature of the cabin. Due to the temperature difference from outside the vehicle and inside the vehicle the customer will occasionally feel warm air when the fresh air inlet opens into the cabin.

Verification: Ensure that there are no DTC’s or HVAC faults present, drive the vehicle and operate HVAC in all ranges of motion to ensure proper operation. If everything is working as designed return the vehicle to the customer informing them of the HVAC fresh air inlet strategy.

I do hope this information helps at this time. Was there anything else at this time you needed ?

Kind Regards,

Emily
Jeep Wave Specialist

That's what the HVAC TSBs say. There are at least 2 or 3 out there, all pretty much say "this is how it works, don't replace parts".

 

[jagonz]

hey everyone. been awhile since I first posted on this in the first couple pages of this thread that now seems to be blowing up. I apologies in advance if I repeat some of the things that have already been said I just don't want to to read threw all 15 pages. long story short I have had the same A/C issue as most here. FCA told me that "that is how we made the gladiators"... after they told the dealership that, the dealership was no longer allowed to touch my truck.... they actually suggested I get a lawyer.... so I did and after 6 pain in the ass months the FCA gave me a pretty decent chunk of change for the problem. I sold my truck back to another dealer and ordered a 2021. (just incase you want to know what the resale value was, I bought the gladiator for 45K drove it around for a year and put 13K miles on then sold it back to another dealer for 43K! pretty much lost no value!) I just received my new 2021 gladiator that I ordered and the A/C is working great. I don't know if they updated something or not but mine is now working good. dealing with the legal process can be annoying and a big waiting game but I'm glad I did it and it was well worth it.

 

[Hootbro]

hey everyone. been awhile since I first posted on this in the first couple pages of this thread that now seems to be blowing up. I apologies in advance if I repeat some of the things that have already been said I just don't want to to read threw all 15 pages. long story short I have had the same A/C issue as most here. FCA told me that "that is how we made the gladiators"... after they told the dealership that, the dealership was no longer allowed to touch my truck.... they actually suggested I get a lawyer.... so I did and after 6 pain in the ass months the FCA gave me a pretty decent chunk of change for the problem. I sold my truck back to another dealer and ordered a 2021. (just incase you want to know what the resale value was, I bought the gladiator for 45K drove it around for a year and put 13K miles on then sold it back to another dealer for 43K! pretty much lost no value!) I just received my new 2021 gladiator that I ordered and the A/C is working great. I don't know if they updated something or not but mine is now working good. dealing with the legal process can be annoying and a big waiting game but I'm glad I did it and it was well worth it.

So you gamed FCA for a payout and ordered and received another Gladiator not knowing if they actually changed anything?

Your story sounds odd.

 

[ShadowsPapa]

So you gamed FCA for a payout and ordered and received another Gladiator not knowing if they actually changed anything?

Your story sounds odd.

Also odd since they had TSBs and other documentation that stated it was working normally....... wouldn't their legal team point to that?

 

[Hootbro]

Also odd since they had TSBs and other documentation that stated it was working normally....... wouldn't their legal team point to that?

If you want to believe the getting lawyer story on face value as there would have been cost in that unless he had a "buddy", the whole getting another Gladiator at the risk I having the same problem that made not liking the first one he owned giving him grief is not a rational move most others would make. Then getting back 96% of paid value for selling the old Gladiator to the other dealer.

It's an orgy of good luck for him.

 

[Mr._Bill]

If you want to believe the getting lawyer story on face value as there would have been cost in that unless he had a "buddy", the whole getting another Gladiator at the risk I having the same problem that made not liking the first one he owned giving him grief is not a rational move most others would make. Then getting back 96% of paid value for selling the old Gladiator to the other dealer.

It's an orgy of good luck for him.

The Lemon Laws vary from state to state. He is probably in a state where they favor the consumer, and his lawyer successfully pointed that out.

 

[Hootbro]

The Lemon Laws vary from state to state. He is probably in a state where they favor the consumer, and his lawyer successfully pointed that out.

Sounds reasonable.

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