Correcting factory HVAC issues

Discussion on Air Conditioning/Heat & electronic controls for the same, radiators/fans/engine cooling and related items.
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Black6
Posts: 113
Joined: Wed Jan 31, 2018 12:36 am
Location: Indy

Correcting factory HVAC issues

Post by Black6 » Fri Feb 05, 2021 12:02 am

Ok. I’m super over how these HVAC temperature controls operate.

While not on auto and temperature set on a constant, this stupid system constantly is changing the temperature. As you all know, it will go from blowing ice cold air to liquid magma as it pleases.

Even changing the temp 1 or 2 degrees can make it going from one extreme to the other. I’m over it.

What I’d like to know is how can we fix this issue on our cars? I just want the “temperature” dial to be like cars have been since 1932, 0% heat flap to 100% heat flap.

I’m assuming this will take some BCM tuning, which I’m ok with. But I know I’m not the only person who this annoys. Other options I can think of are disabling temperature sensors, but I don’t know how that would impact the actual operation of the system. If it goes to a default then that’s perfect.
Black 2014 V8

Be jealous of my factory carpet.

Sanford
Posts: 176
Joined: Tue Dec 13, 2016 3:38 am
Location: Texas Gulf Coast

Re: Correcting factory HVAC issues

Post by Sanford » Fri Feb 05, 2021 1:40 am

May want to hook the car up to scan tool that will read the HVAC module and see if you have any trouble codes. I don’t know how well the 14’s controls the output, but I am well satisfied how the 11-13’s work. If they keep working for another 15 years, I will really be impressed.

David

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sardillim
Posts: 116
Joined: Thu Apr 24, 2014 3:45 am
Location: Easton Ct

Re: Correcting factory HVAC issues

Post by sardillim » Fri Feb 05, 2021 2:34 am

i have a 12 and no issues

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Mooseman
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Location: Ottawa, ON Canada
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Re: Correcting factory HVAC issues

Post by Mooseman » Fri Feb 05, 2021 3:04 pm

I second getting a scan tool or taking it to a dealer that can read commanded and actual actuator positions. Sounds like you have a screwed up temp actuator.
2011 Caprice PPV, 1 of possibly 3 in Canada!
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xcidmigs
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Joined: Sat Feb 14, 2015 2:12 am
Location: SE PA

Re: Correcting factory HVAC issues

Post by xcidmigs » Fri Feb 05, 2021 3:10 pm

My 2011 doesn't do this either

Black6
Posts: 113
Joined: Wed Jan 31, 2018 12:36 am
Location: Indy

Re: Correcting factory HVAC issues

Post by Black6 » Fri Feb 05, 2021 3:54 pm

There is nothing wrong with the car, the HVAC is just programmed like shit.

I guess that I should say that I’m looking for 14+ owners and their input.


Are any other 14+ owners who want to have their HVAC programming fixed or know how to trick the system?
Black 2014 V8

Be jealous of my factory carpet.

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