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  #49  
Old 01-07-2014, 06:59 PM
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Quote:
Originally Posted by 2012 Summit View Post
Sounds like normal operation. Even when in manual mode, you are setting a desired temperature much like you do with the thermostat in your home.

Manual Operation

The system allows for manual selection of blower speed,
air distribution mode, A/C status and recirculation control.

The blower fan speed can be set to any fixed speed by
adjusting the blower control. The fan will now operate at
a fixed speed until additional speeds are selected. This
allows the front occupants to control the volume of air
circulated in the vehicle and cancel the Auto mode.

The operator can also select the direction of the airflow
by selecting one of the available mode settings. A/C
operation and Recirculation control can also be manually
selected in Manual operation.
But in your house the temp stays a constant temperature and the air coming out of the registers is 80 to 90ish degrees. There also is no blend door to change the temp of the air coming out of the furnace. If I have my hvac set to 65 degrees it should geel like it is 65 degrees in the jeep, not anywhere from 120 degrees to 50 degrees.
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  #50  
Old 01-07-2014, 07:40 PM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by 2012 Summit View Post
Sounds like normal operation. Even when in manual mode, you are setting a desired temperature much like you do with the thermostat in your home.
Very much disagree. Let me paint you the scenario:

- Current ambient temperature of the area is 60 degrees, HVAC off
- HVAC thermostat turned on, set to 68 degrees
- HVAC system blows warm air (around 68 degrees, maybe slightly warmer) until ambient temperature reaches ~68 degrees (maybe +1/2)
- HVAC system turns off, puts a +/- 2-3 degree variation around the desired setting (meaning it won't kick back on until it hits ~66 or ~70).

Great, everything's fine to here. Lets say the system just kicked off, and the ambient temperature is now 68 degrees on the nose. But we're still a little cold!

- User adjusts thermostat to 72 degrees
- HVAC system turns on, begins blowing warm air

That would be fine, except in the Jeep's HVAC system as people are describing, it's blowing air 20+ degrees warmer than desired for a very small adjustment! When the ambient is 68, and the desired is 72, blowing 95+ degree air is not normal operation

Personally, I have exactly the opposite issue. I haven't been getting burned out, but my scenario is:
- Ambient temperature reaches desired level, HVAC system shuts off
- Leaves blower on low
- Get extremely cold air coming out of vents

In my scenario, the ambient temperature is just about right, but it's blasting me with outside ambient temperature (e.g. 35 degree) air. When I turn on re-circulation this problem doesn't happen. However, just always leaving recirculation on isn't really an option, especially as auto mode disables it (appropriately, if a little too aggressively) to de-fog the windows. There's no scenario where I should have the thermostat set at 70 degrees (or thereabouts) and be getting hit with either 95+ or sub-40 degree air, especially when the ambient temperature is already within +/- 5 or so of the thermostat.

Neither of these scenarios is "normal operation". Furthermore, I've been buying cars with "automatic" climate control for the last 10 years and never encountered anything like this issue. The concept that the 2014 Jeep HVAC is much, much worse than my 2000 BMW's automatic climate control seems wrong. I sincerely hope this is a problem with the unit, and not Chrysler's idea of "working as intended." The fact that so many people don't see this as an issue leads me to believe that this is indeed an issue with my individual unit, that doesn't come up very often... But it's pretty annoying to be told by others "that's how it should work" when it's pretty clear that's not true (especially when it's a service representative!)
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  #51  
Old 01-07-2014, 08:08 PM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by jeepwes View Post
This is exactly what happens to my 2014 GC. I set manual to 60, it starts blowing really hot air and then will come down eventually but its so hot I have to turn it off. HVAC sucks in this car!
Will make an appointment to waste my time in a week or so. I think the car is trying to get it to 60 fast even though its in manual mode, its behaving like auto.
Quote:
Originally Posted by loveracing1988 View Post
But in your house the temp stays a constant temperature and the air coming out of the registers is 80 to 90ish degrees. There also is no blend door to change the temp of the air coming out of the furnace. If I have my hvac set to 65 degrees it should geel like it is 65 degrees in the jeep, not anywhere from 120 degrees to 50 degrees.
Yes, you are correct when you say "If I have my hvac set to 65 degrees it should feel like it is 65 degrees in the jeep, not anywhere from 120 degrees to 50 degrees". If your system is operating properly, you should eventually achieve the desired temperature.

I took it as jeepwes saying it starts blowing hot and then will come down eventually (that would be normal).
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  #52  
Old 01-07-2014, 08:23 PM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by 2012 Summit View Post
I took it as jeepwes saying it starts blowing hot and then will come down eventually (that would be normal).
I would agree with you, if the output from the vent were a reasonable temperature. 130+ F (as I have documented from my vents) is not a reasonable temperature.

All the programmers need to do is restrict the maximum amount of hot air the system is blending. Yes, it will take longer to achieve the set temperature. However, that will prevent me from cycling the damn thing from LO back to 63 F (alternating between freezing and feeling searingly hot air).

When my wife drops the temperature on a vehicle from 68 F to 64 F during the winter because she is getting uncomfortably hot in the passenger seat, there is something wrong (she gets cold even in the summer).

I would have preferred a "heat throttle" (as others have described it) rather than this automatic climate control system, because at least then I could just set it at a comfortable air vent temperature.

I wonder if there is a difference in experience among the different engine types. I have a diesel; perhaps the thermal profile of the diesel's hot air differs from the thermal profile calibration that the engineers created.
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  #53  
Old 01-08-2014, 06:35 AM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by _Bryan_ View Post
Very much disagree. Let me paint you the scenario:

- Current ambient temperature of the area is 60 degrees, HVAC off
- HVAC thermostat turned on, set to 68 degrees
- HVAC system blows warm air (around 68 degrees, maybe slightly warmer) until ambient temperature reaches ~68 degrees (maybe +1/2)
- HVAC system turns off, puts a +/- 2-3 degree variation around the desired setting (meaning it won't kick back on until it hits ~66 or ~70).

Great, everything's fine to here. Lets say the system just kicked off, and the ambient temperature is now 68 degrees on the nose. But we're still a little cold!

- User adjusts thermostat to 72 degrees
- HVAC system turns on, begins blowing warm air

That would be fine, except in the Jeep's HVAC system as people are describing, it's blowing air 20+ degrees warmer than desired for a very small adjustment! When the ambient is 68, and the desired is 72, blowing 95+ degree air is not normal operation

Personally, I have exactly the opposite issue. I haven't been getting burned out, but my scenario is:
- Ambient temperature reaches desired level, HVAC system shuts off
- Leaves blower on low
- Get extremely cold air coming out of vents

In my scenario, the ambient temperature is just about right, but it's blasting me with outside ambient temperature (e.g. 35 degree) air. When I turn on re-circulation this problem doesn't happen. However, just always leaving recirculation on isn't really an option, especially as auto mode disables it (appropriately, if a little too aggressively) to de-fog the windows. There's no scenario where I should have the thermostat set at 70 degrees (or thereabouts) and be getting hit with either 95+ or sub-40 degree air, especially when the ambient temperature is already within +/- 5 or so of the thermostat.

Neither of these scenarios is "normal operation". Furthermore, I've been buying cars with "automatic" climate control for the last 10 years and never encountered anything like this issue. The concept that the 2014 Jeep HVAC is much, much worse than my 2000 BMW's automatic climate control seems wrong. I sincerely hope this is a problem with the unit, and not Chrysler's idea of "working as intended." The fact that so many people don't see this as an issue leads me to believe that this is indeed an issue with my individual unit, that doesn't come up very often... But it's pretty annoying to be told by others "that's how it should work" when it's pretty clear that's not true (especially when it's a service representative!)
Sounds like a trip to the service dept. Good Luck.
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  #54  
Old 01-08-2014, 06:36 AM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by Roadkill View Post
I would agree with you, if the output from the vent were a reasonable temperature. 130+ F (as I have documented from my vents) is not a reasonable temperature.

All the programmers need to do is restrict the maximum amount of hot air the system is blending. Yes, it will take longer to achieve the set temperature. However, that will prevent me from cycling the damn thing from LO back to 63 F (alternating between freezing and feeling searingly hot air).

When my wife drops the temperature on a vehicle from 68 F to 64 F during the winter because she is getting uncomfortably hot in the passenger seat, there is something wrong (she gets cold even in the summer).

I would have preferred a "heat throttle" (as others have described it) rather than this automatic climate control system, because at least then I could just set it at a comfortable air vent temperature.

I wonder if there is a difference in experience among the different engine types. I have a diesel; perhaps the thermal profile of the diesel's hot air differs from the thermal profile calibration that the engineers created.
Sounds like a trip to the service dept. Good Luck.
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  #55  
Old 01-09-2014, 08:42 PM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by 2012 Summit View Post
Sounds like a trip to the service dept. Good Luck.
Been there, done that. Service department wasn't able to help. STAR report came back "normal and cannot be changed". I am now awaiting an answer to my letter of complaint to Chrysler. When I set the temp to 68, it should heat the interior to 68. Period. My 2011 Jeep GC HVAC worked perfectly. My 2014 should work as well.
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  #56  
Old 01-10-2014, 06:45 AM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by maxim5928 View Post
Been there, done that. Service department wasn't able to help. STAR report came back "normal and cannot be changed". I am now awaiting an answer to my letter of complaint to Chrysler. When I set the temp to 68, it should heat the interior to 68. Period. My 2011 Jeep GC HVAC worked perfectly. My 2014 should work as well.
Perhaps another dealer could help. Some service departments are better than others.
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  #57  
Old 01-11-2014, 11:47 PM
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Re: Problem With 2014 Grand Cherokee Heater

i didnt read all these but I have to say, the AUTO system in my 2014 limited is terrible, just like others are describing. The temps are even CLOSE! DO this...

Set it to 70-72... shut off.. let it get cold. Remote start... let it warm up.. you get it seems a bit hot, turn DOWN the temp.. now it should drop the fans way down but no.. mine increases the fan and continues to blow hot air!!! it gets even hotter! This system is total garbage. Like Maxim, My 2011 laredo had ZERO issues with this and worked perfectly... dont know who messed the new one up but wow. its bad.

Same thing in the summer, i actually had the HEAT come on while trying to make it colder. It was at like 74 and i dropped it down to 60 and it was blasting HEAT. I then had to go to manual for about 20 minutes.. then auto decided to work again.

with all the crap thats wrong - that doesnt quite work like it should - i wish I had kept my 2011
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Old 01-13-2014, 04:21 PM
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Re: Problem With 2014 Grand Cherokee Heater

Had same problem, took it to Quirk jeep in braintree, MA and solved the problem. It's not perfect, but it is very close to it. Here is what my slip said. "Checked for updates, none found, reflash with same calibration, perform hvac door calibration procedure three times, passed all three times, test controls and bus and feed back circuits, all were within normal limits, verify power grounds and feeds, all appear normal at this time, also perform witech updates on pcm, ascm and tcm. Check for temperature variation, run heater performance tests, 12 degrees is allowable, run sensor tests, replaced the sun sensor. By the way Quick Jeep also solved my front steering wheel shimmy also. My jeep doesn't have one ounce of vibration up to 90MPH, and I have the 20" goodyear Fortera tires. Three other dealers told me it was normal for the front steering wheel to shimmy, caused by the electric assisted steering and there was no cure. Now I travel 1 1/2 hour (out os state) for good service.
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  #59  
Old 01-13-2014, 04:30 PM
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Re: Problem With 2014 Grand Cherokee Heater

Hi Bryans,

So when you say not perfect, does that mean the temperature is accurate now I.e. 70 feels like 70 and not 85? It sounds like from the slip that in Jeep's mind 70 can feel like 82 (12 degrees temperature variation) and it be considered normal?

Also what did the dealership do to fix the steering wheel? I am continually having that problem. They did an alignment fix and that helped only for a brief period and now it shakes like crazy again.

Thanks. Oh by the way if anyone in Colorado wants to buy my 2014 Overland under 7k miles, let me know!

Matt
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Old 01-13-2014, 10:36 PM
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Re: Problem With 2014 Grand Cherokee Heater

Quote:
Originally Posted by bryans View Post
Had same problem, took it to Quirk jeep in braintree, MA and solved the problem. It's not perfect, but it is very close to it. Here is what my slip said. "Checked for updates, none found, reflash with same calibration, perform hvac door calibration procedure three times, passed all three times, test controls and bus and feed back circuits, all were within normal limits, verify power grounds and feeds, all appear normal at this time, also perform witech updates on pcm, ascm and tcm. Check for temperature variation, run heater performance tests, 12 degrees is allowable, run sensor tests, replaced the sun sensor. By the way Quick Jeep also solved my front steering wheel shimmy also. My jeep doesn't have one ounce of vibration up to 90MPH, and I have the 20" goodyear Fortera tires. Three other dealers told me it was normal for the front steering wheel to shimmy, caused by the electric assisted steering and there was no cure. Now I travel 1 1/2 hour (out os state) for good service.
Sounds like they took you seriously and did a thorough job.

Sounds like the dealer is a keeper too.
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