C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

No Heat need ideas

Thread Tools
 
Search this Thread
 
Old Oct 20, 2020 | 08:24 AM
  #1  
xtenzzive's Avatar
xtenzzive
Thread Starter
Intermediate
 
Joined: Jul 2019
Posts: 34
Likes: 8
From: Charlotte NC
Default No Heat need ideas

07 c6 base im getting no heat from the vents. I dont hear the blend door switching when I crank heat up to 90. Cold air with or without ac on, couldn't actually tell a difference with ac on but it was pretty chilly either setting. May need to check this further.

Replaced the thermostat - stock temp
replaced the blend mode door actuator - on passenger side next to glove box. Royal pain but can be done with extreme patience.
I'm getting 140 degrees on heater hoses in and out of the core.
Tried the ambient air reset
All hvac fuses on passenger floor board good.

I'm leaning towards the ac head unit at the moment but its just a guess right now.

any thoughts welcome need to brain storm ideas.
Thanks
Reply
Old Oct 20, 2020 | 04:40 PM
  #2  
xtenzzive's Avatar
xtenzzive
Thread Starter
Intermediate
 
Joined: Jul 2019
Posts: 34
Likes: 8
From: Charlotte NC
Default

Ac compressor is on even at 90 degrees, will turn off manually with the no ac button but cant confirm if that is the oem function.
Reply
Old Nov 3, 2020 | 08:22 AM
  #3  
xtenzzive's Avatar
xtenzzive
Thread Starter
Intermediate
 
Joined: Jul 2019
Posts: 34
Likes: 8
From: Charlotte NC
Default

Swapped HVAC control unit and no luck.

BCM Maybe? I've suspected this for other issues in the car - intermittent LF blinker inop that coincides with high beam and fog intermittent - high rev engine start - random no fob - intermitent service traction - random limp mode -

Anyone have a lead on the most detailed service manual for this car? All Data DIY sucks.
Reply
Old Nov 3, 2020 | 06:11 PM
  #4  
4SUMERZ's Avatar
4SUMERZ
Race Director
15 Year Member
Photogenic
Photoriffic
Shutterbug
 
Joined: Sep 2009
Posts: 11,338
Likes: 2,438
From: Eastern
Default

Could be a Mode blend door valve itself. It is a fabric that gets bound up. There are threads on replacing those for the reason that you are experiencing, but not an easy DIY
https://www.corvetteforum.com/forums...placement.html
Reply
Old Nov 5, 2020 | 02:48 PM
  #5  
xtenzzive's Avatar
xtenzzive
Thread Starter
Intermediate
 
Joined: Jul 2019
Posts: 34
Likes: 8
From: Charlotte NC
Default

Holy F#$%

I had heard of this but not seen it.....

Thanks for the reply.
Reply

Get notified of new replies

To No Heat need ideas





All times are GMT -4. The time now is 11:34 AM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE