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  #13  
Old 12-30-2013, 11:56 AM
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Re: Heat not adjusting

There are actually 2 bulletins out for hvac problems. Your dealer should be aware of these. New software
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  #14  
Old 12-30-2013, 03:33 PM
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Originally Posted by xj31 View Post
There are actually 2 bulletins out for hvac problems. Your dealer should be aware of these. New software
Which bulletins? There haven't really been any that have came out recently.
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Old 12-30-2013, 05:13 PM
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Re: Heat not adjusting

I am currently experiencing the fluctuating temperatures in my Overland. I've noticed this only happens when recirculation is off (which on Auto, turns off very very quickly when it's cold out).

I'll be driving with 35 degree temperatures outside, finally get the car warmed up to a comfortable temperature, then all of a sudden start getting blasted with the 35 degree outside ambient air for some reason
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Old 12-30-2013, 09:44 PM
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Re: Heat not adjusting

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Originally Posted by loveracing1988 View Post
Or it could be a actual problem... we just took two two hour long road trips. I was hot then I was cold then hot then cold, all with it being set at 68 degrees. Bump it up to 70 when cold and 20 minutes later the air blowing out of the vents is so hot you can't stand it, turn it down to 68 and 20 minutes later you are freezing. I tried keeping it set at 68 as long as I could but when it can't maintain 68 there is a problem. No other vehicle I have ever ridden in has this problem.
Do you have it in Auto by any chance?

I have it on manual (floor and face) and fan on 2, temp on 70.

I never have to touch it. Except bad weather i hit defrost.

Auto is not so good. Granted, auto should work better.
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Old 12-30-2013, 09:55 PM
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Re: Heat not adjusting

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Originally Posted by mswlogo View Post
Do you have it in Auto by any chance?

I have it on manual (floor and face) and fan on 2, temp on 70.

I never have to touch it. Except bad weather i hit defrost.

Auto is not so good. Granted, auto should work better.
My issues are definitely on auto. My understanding is the only real difference is the blower speed... So if there's something that gets fixed simply by turning off auto, that's pretty bad.

I'll give it a shot on my next road trip (tomorrow).
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Old 12-30-2013, 09:57 PM
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Quote:
Originally Posted by mswlogo View Post
Do you have it in Auto by any chance?

I have it on manual (floor and face) and fan on 2, temp on 70.

I never have to touch it. Except bad weather i hit defrost.

Auto is not so good. Granted, auto should work better.
Nope, never use auto. It is left on the floor unless it is snowing or raining then it is switched to the floor and defrost.
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Old 01-01-2014, 03:58 PM
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Re: Heat not adjusting

I verified I get cold (possibly outside ambient) air blown on me even in manual mode. It's really behaving like a temp sensor is busted somewhere or it just has some really bad logic. When it senses 1 degree hotter than currently set, it blasts you with the coldest air it can get for a good five or ten minutes before cycling back to hot.

-- edit --
As an update to this, the only time I ever notice the issue is with air recirculation off. I suppose that makes sense as with recirculation on, I'm getting the current temp (which is typically roughly right). It seems like when it's not actively trying to reach a temperature because it's already close enough (like when a thermostat shuts off because it's within tolerance) it then just lets outside air in.
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Old 01-01-2014, 10:43 PM
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Re: Heat not adjusting

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Originally Posted by _Bryan_ View Post
I verified I get cold (possibly outside ambient) air blown on me even in manual mode. It's really behaving like a temp sensor is busted somewhere or it just has some really bad logic. When it senses 1 degree hotter than currently set, it blasts you with the coldest air it can get for a good five or ten minutes before cycling back to hot.

-- edit --
As an update to this, the only time I ever notice the issue is with air recirculation off. I suppose that makes sense as with recirculation on, I'm getting the current temp (which is typically roughly right). It seems like when it's not actively trying to reach a temperature because it's already close enough (like when a thermostat shuts off because it's within tolerance) it then just lets outside air in.
I usually have recirculate off and never get blasted with cold air.

Could be a stuck damper door too and perhaps is a door that is out of the loop when you recirculate.

I don't know for sure if it applies at all, but do you have the latest radio update? Not sure if some of the logic is in the Uconnect firmware.

My guess is, that it's not and the Uconnect is just "Buttons" to the separate HVAC system.
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  #21  
Old 01-03-2014, 12:56 AM
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Re: Heat not adjusting

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Originally Posted by mswlogo View Post
I usually have recirculate off and never get blasted with cold air.
Unfortunate for me, simply because it means it's not an "affecting everyone" issue which means it'll get less visibility

Quote:
I don't know for sure if it applies at all, but do you have the latest radio update? Not sure if some of the logic is in the Uconnect firmware.

My guess is, that it's not and the Uconnect is just "Buttons" to the separate HVAC system.
I do indeed have the latest. This issue is extremely frustrating as a do a lot of night driving in the mountains.
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