First time needing the heater and there are either issues or i am not using it right.

[penright]

First time needing the heater and there are either issues or i am not using it right.

Heater controls are not working for heat. Air works fine. It will not blow at the feet and not get warm.

 

[RIT333]

What have you done to turn on the heater ? There are two temperature dials, and the fan needs to be on.

You can check your coolant temperature on the right screen.the car must have been run for maybe 5 minutes for the coolant temperature to stabilize.

 

[PoManNox]

Are you using automatic or manual temperature control? I keep my 2021 LT model in manual control.

Your HVAC controls are different on your 2025 vs my 2021 though.

 

[Lazy Bones]

If you're not sure of the controls, just say "Hey Google" and say "set the temperature to (whatever you want)"

 

[penright]

If you're not sure of the controls, just say "Hey Google" and say "set the temperature to (whatever you want)"

Is this a joke or serious? I have to ask becuase it would not supprise me with today's tech. My sister-in-law was standing behind and off to the side and the car not on stopped, but refused to go any more. I could see her and knew if was safe, but the car would not have any of it.

Are you using automatic or manual temperature control?

All the above. When trying to select different modes, ie floor, defrost, etc, it only blows out the side vents.

There are two temperature dials, and the fan needs to be on.

I have maxed them out to where they say 'HI' or something like that.

You can check your coolant temperature on the right screen.the car must have been run for maybe 5 minutes for the coolant temperature to stabilize.

I am sure that is good.

When I posted it, I was at my granddaughter's basketball game and did not provide much context or have all the available information at the time. I also was trying to read the owner's manual on my phone's tiny screen. I am old and blind. :=) I did notice that none of the buttons affected the direction in which it was blowing. Also when we left, the longer it ran the colder it got like when the A/C is on.

When I got home, I connected my bi-directional scanner. Before I post anything, I am not going to relearn anything, I will take it to the dealership. It just pointed me to there is something wrong.

The BCM has some codes and they are in the context of the issue.



When I was in the BCM trying to see if the switches say, once I got a com error and had to reconnect. I could commad on some of the systems that are working, but when trying to command the blend doors, I could not tell a differance. I did not spend a lot of time poking around and did not see any way to command the "Temperature Valve Actuator". The PID I found for the tempture contols only showed HI or noraml, not any number values. It did go to high when I selected the max. Makes me think that is getting to the BCM.
My scan tool is not professanl grade, it is the Topdon ArtiDiag Pro, and I am very new to it, so it might be there and I can not find it due to my ingorance.

I have not found anything online yet to tell me what signales are invloved in commanding the TVA, MVA, etc.
I did not want to poke around too much or leave any traces for the dealership to blame it on me.

 

[PoManNox]

Looks like you found what's up. Good grief too. On a brand new 2025 no less. Hopefully it's something simple like an unplugged connector. As much as I like my GM products, the general strikes again!

 

[penright]

Hopefully it's something simple like an unplugged connector.

That's my thought. What I can't explain is, if true, how did it get out of the factory? You would think they would scan for codes. Again, assuming an unplugged connector, it could be the dealership worked on something, but that's not a good image either. An early failure would at least mean QC worked. Now seeing when and how long it will be in the shop. That is one reason I like doing my own work.

 

[Lazy Bones]

For the 2025, the "Hey Google" is no joke. See your salesman.

 

[ricklack]

When you changed the mode and air flow did not change, that was the key to tell you that it is the car, not you.

 

[penright]

When you changed the mode and air flow did not change, that was the key to tell you that it is the car, not you.

That was my thinking, but a car that can be controlled by Google, would not surprise me if you had to whisper a secret password.
Just made an appointment to drop it off this Wednesday.

 

[zippyzoe]

For the 2025, the "Hey Google" is no joke. See your salesman.

Good post. It works for me.
Just wondering -- my steering wheel heater turns on and the seat warmer warms my bum when the outside temp is 50. Is this the same for others?

 

[Autoworker 74]

First time needing the heater and there are either issues or i am not using it right.

Heater controls are not working for heat. Air works fine. It will not blow at the feet and not get warm.

 

[Autoworker 74]

I felt like I had the same problem but try this. Press the lower directional button, press and turn off any of the other buttons that push air to the windshield or your face. Turn the fan speed on high. While the car is parked get to where you can bend down and put your hand down near the pedals. Seems simple I know but I couldn't feel it blowing while driving and I also thought like you that the down setting wasn't working. There is plenty of warm air on both sides but you really can't feel it blowing while driving. The heater is definitely keeping the vehicle warm

 

[penright]

Press the lower directional button, press and turn off any of the other buttons that push air to the windshield or your face. Turn the fan speed on high.

I pushed a lot of buttons, but nothing worked. Maybe I still need to whisper some sweet nothings in her ear.
Plus once I got time to read codes, there were some.

 

[penright]

Picked the car up last night. They say it is a BCM and has to come from Michigan. It will take at least 4 business days.

The actuators were responding, so the tech said he could jump it so it would always be hot and blow out the defrost vents. My first thought was it all made sense, but after driving it home not so much. I could turn the fan off but the vent still put out a small amount and I cooked. I have to give kudos to the dealership and mostly the tech, I am sure he didn't make anything. I would bet GM does not have time for hot wiring a BCM They also checked my LKA and I will update my other thread, bottom line 2025 GM LKA is not as good as a 2016 Honda Civic.

 

[PoManNox]

Thanks for updating and hopefully this solves it. The old "needs a computer" diag always makes me nervous as it's often not the case. What is an LKA?

 

[penright]

What is an LKA?

Lane Keep Asist.

More updates ....
Looks like the BCM did fix the heater issue and here are all the hoops the dealer did to get the car fixed. I have to give them a lot of Kudos.

The updated ETA from Michigan was 3 to 4 weeks. The dealer found one in Fort Worth and had it shipped to OKC. It arrived on Friday, but the tech was off on Saturday. He said, if I leave overnight, he would work Saturday to put it in. They shipped it to OKC warehouse and not the dealership and they were closed on Saturday for inventory. The dealership got ahold of someone there and walked it through and hotshot it to the dealership. Since my service writer was off, it was a different one and he did not have the right phone number, so I texted my service writer on his day off and he worked all that out. Extremely pleased with the dealership's effort in resolving one issue after another.

I had to run the 2nd Key Fob so they could reprogram the BCM on Saturday. While waiting, the new car guys let me drive a different 2015 to compare the LKA. After some hunting to find the setting again, at least I had pictures from where I posted that the manual is wrong. Unfortunately, the LKA was the same, so yes 2025 LKA is worthless. The owner's manual is not 100% caught up with 2025, even though it is labeled 2025.

The old "needs a computer" diag always makes me nervous

Yes, there are two YouTube channels that have a ton of misdiagnosed needed computers/wire harnesses from dealerships. Either a broken wire, tension on a pin, etc.


I wonder if we should start a thread for failures to track trends. Some DYI guy would love to see that information 10 years from now.

 

[Lazy Bones]

Ditto on the poor documentation. Glad your problem is **finally** over.

 

[PoManNox]

I keep my expectations of car dealers extremely low, but yours without a doubt, went above and beyond for you for this situation. What you describe is incredible IMO.

In terms of the LKA, I keep it turned off most of the time on my 2021 Equinox because I find in annoying. There are times I appreciate it's efforts though.. This is the first vehicle I've ever had with LKA, so I have nothing to compare it to. I'm more of a base model vehicle guy.