Random hot air blowing from vents? - Chevy Colorado & GMC Canyon
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  • 1 Post By Mellowyellowz
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post #1 of 9 (permalink) Old 05-07-2017, 10:28 AM Thread Starter
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Random hot air blowing from vents?

On my way home just now, I had hot air blowing through my vents for a good 5 minutes. I turned the AC on during that time, and the hot/cold air were mixing to make it not so hot, but not as cold as 70* should feel. Anyone know why this is? My settings were off when this happened.

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post #2 of 9 (permalink) Old 05-07-2017, 06:47 PM
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reduce temp to 68-69
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post #3 of 9 (permalink) Old 05-07-2017, 10:05 PM Thread Starter
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Originally Posted by Mellowyellowz View Post
reduce temp to 68-69
I doubt that'll do anything cause the AC/Air wasnt even on at the time. The two temperatures were mixing. So some source of hot air, besides the AC, was blowing simultaneously creating a lukewarm air. All my gauges were reading normal, engine temp was normal.

2017 Summit White Colorado Z71
CC, 4X4, V6, SB

Mods:
Eibach Pro
Zone Offroad 1.5" BL
Icon Swaybar Reloc.
Autosprings Diff. Drop
Swaybar Endlinks
Fuel Vectors 17" (custom painted matte gray)
Falken Wildpeak A/T3W 265/70/17 E-load
Blackoak 30" curved LED
RC mounting brackets
Rigid Industries Security Hardware Kit
Powdercoated Tow hooks
Illuminated Front Emblem // Black Rear Emblem
Tyger Armor Star Armor Side Step/Nerf Bars
Amerex B417 Fire Extinguisher
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post #4 of 9 (permalink) Old 05-08-2017, 06:14 PM
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Quote:
Originally Posted by Jay Bee View Post
On my way home just now, I had hot air blowing through my vents for a good 5 minutes. I turned the AC on during that time, and the hot/cold air were mixing to make it not so hot, but not as cold as 70* should feel. Anyone know why this is? My settings were off when this happened.
It sounds like the hot/cold blend temperature sensor. Wasn't there a recall for this? I think even if "auto" mode is off, the system still tries to mix the air for the desired temperature. I think the only exception would be the "low" setting, you should try that maybe next time.
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post #5 of 9 (permalink) Old 05-08-2017, 06:39 PM
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Originally Posted by agsy View Post
It sounds like the hot/cold blend temperature sensor. Wasn't there a recall for this? I think even if "auto" mode is off, the system still tries to mix the air for the desired temperature. I think the only exception would be the "low" setting, you should try that maybe next time.
That was for 15 & 16's with the auto system, which resulted in a lack of heat.
The way the auto system works is a total enigma. Unless you are the engineer that designed it, any explanation is a stab at a possibility.
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post #6 of 9 (permalink) Old 05-08-2017, 10:17 PM Thread Starter
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Originally Posted by RatRacer View Post
That was for 15 & 16's with the auto system, which resulted in a lack of heat.
The way the auto system works is a total enigma. Unless you are the engineer that designed it, any explanation is a stab at a possibility.
Lol, so since it was like 50* outside, my car decided to blow hot air even with the ventilation/AC system off?

2017 Summit White Colorado Z71
CC, 4X4, V6, SB

Mods:
Eibach Pro
Zone Offroad 1.5" BL
Icon Swaybar Reloc.
Autosprings Diff. Drop
Swaybar Endlinks
Fuel Vectors 17" (custom painted matte gray)
Falken Wildpeak A/T3W 265/70/17 E-load
Blackoak 30" curved LED
RC mounting brackets
Rigid Industries Security Hardware Kit
Powdercoated Tow hooks
Illuminated Front Emblem // Black Rear Emblem
Tyger Armor Star Armor Side Step/Nerf Bars
Amerex B417 Fire Extinguisher
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post #7 of 9 (permalink) Old 05-08-2017, 11:12 PM
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Originally Posted by Jay Bee View Post
Lol, so since it was like 50* outside, my car decided to blow hot air even with the ventilation/AC system off?
I believe the only way to truly turn the system "off", is to pull the fuse.
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post #8 of 9 (permalink) Old 05-08-2017, 11:37 PM Thread Starter
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Originally Posted by RatRacer View Post
I believe the only way to truly turn the system "off", is to pull the fuse.
I would like to give the DERP award to the engineers at chevy.
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2017 Summit White Colorado Z71
CC, 4X4, V6, SB

Mods:
Eibach Pro
Zone Offroad 1.5" BL
Icon Swaybar Reloc.
Autosprings Diff. Drop
Swaybar Endlinks
Fuel Vectors 17" (custom painted matte gray)
Falken Wildpeak A/T3W 265/70/17 E-load
Blackoak 30" curved LED
RC mounting brackets
Rigid Industries Security Hardware Kit
Powdercoated Tow hooks
Illuminated Front Emblem // Black Rear Emblem
Tyger Armor Star Armor Side Step/Nerf Bars
Amerex B417 Fire Extinguisher
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post #9 of 9 (permalink) Old 05-10-2017, 11:45 AM
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Quote:
Originally Posted by RatRacer View Post
That was for 15 & 16's with the auto system, which resulted in a lack of heat.
The way the auto system works is a total enigma. Unless you are the engineer that designed it, any explanation is a stab at a possibility.
I find the AUTO hvac in my 2017 to be a little wonky too. small temp adjustments blast me with COLD or HOT air. Depending on if I go up or down.
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