Let's get some perspective: Is your Grenadier AC working as it should?

[G-Man]

Who else's AC is batsh1t crazy and randomly blows hot air one day and cold the next on the exact same setting? I don't think the AC system got the attention it deserved during the 1.2 million miles of road testing, that's for sure. I love my new truck but it's the one thing that drives me nuts on pretty much a daily basis as I fiddle away at the controls and I'm surprised Ineos haven't found a fix for it yet. I gather it's down to sticky solenoid valves or such like and is probably an expensive warranty concern for them.

It would be useful to set up a poll on this forum and get an idea of what percentage and numbers of owners here have flaky AC. This forum must represent a decent amount of the Grenadier owner population, perhaps it would help sharpen Ineos' perspective on the issue if it popped up on every Google search relating to Grenadier AC issues. I don't have the ability to raise a forum poll but maybe @Stu_Barnes would consider it a worthy exercise

 

[anand]

It certainly has a mind of its own. I keep holding on to hope that it can be fixed via software because it is controlled by software. They totally missed the boat by not going old school on the HVAC; my only guess is they thought it would not have been posh enough or something. Mind you the truck doesn't have a visor mirror so it fails the upscale test anyway.

There isn't an HVAC control module that has any diagnosis or codes or anything, so a software patch is unlikely

 

[MTNDOG]

I discovered something this morning - once I was up to temp I set the temp dial to max, fan off, and pressed the auto button. The fan came on but so did the AC snowflake light (which I believe is normal) - but, when I depressed the AC button to turn it off, I heard a flap closing and the same "suction" sound I noticed the other morning. I tried this several times and it happened each time, so does the AC button somehow come into play with the HVAC heat disappointment?

Does the fan turn off as well when you turn off the A/C? I was under the impression that shutting the A/C off in Auto mode would kick the HVAC back into manual mode. My best setting for heat so far is manual mode, direction dial set to face and feet, A/C on and adjust temp and fan speed as needed.

 

[Krabby]

Does the fan turn off as well when you turn off the A/C? I was under the impression that shutting the A/C off in Auto mode would kick the HVAC back into manual mode. My best setting for heat so far is manual mode, direction dial set to face and feet, A/C on and adjust temp and fan speed as needed.

Not sure TBH. Will check on my way home.

 

[Krabby]

There isn't an HVAC control module that has any diagnosis or codes or anything, so a software patch is unlikely

What controls it? It must be all electronically controlled, so is the programming just in the hardware? You just ruined my day BTW.

 

[anand]

What controls it? It must be all electronically controlled, so is the programming just in the hardware? You just ruined my day BTW.

From what I've been told it is all internal in the controls, and that outputs the information to the heater box; there's no separate module that can be accessed/scanned/reflashed/etc.

I will say that an infotainment update on the PTO2s made it appear to become better, but I'm not sure exactly what was changed (early PTO2s one click of the wheel could be 1°F, or it could be 5°F, it literally had a mind of its own)

 

[Tom109]

@Krabby - I set vents to floor, set fan speed, adjust temp dial. This is all in manual with the AC button off. Good heat flow to the floor (but my wife says lacking on the passenger side). I like this best as I can crack two windows if it gets too warm.

 

[Tom109]

What controls it? It must be all electronically controlled, so is the programming just in the hardware? You just ruined my day BTW.

The fact that the whole center cluster is just one PCB is not confidence inspiring.

 

[MTNDOG]

What controls it? It must be all electronically controlled, so is the programming just in the hardware? You just ruined my day BTW.

So wonder if there is a chance the blend doors or whatever are hooked up backwards or out of sync. Like if they are servo driven, the servos were not centered or rested in the correct position when the vent doors were hooked up. Or is something in the wiring backwards like the compass/altimeter in the center stack dim when headlights are off and bright when headlights are on. A/C button on actually means off?