Swap ATC to manual Air Con - anyone converted ??

Sonic ZS · 11th January 2022, 13:47

As per title really, just wondered if anyone has done this, what's involved, etc. Any thoughts appreciated

My partner had to drive my 75 unexpectedly recently and trying to explain by text how the ATC operates was quite a task, when all she really needed was to demist the screen. Hence this post...

I've never been too worried about all the various features of the ATC system, would be happy with normal knobs, just wondering if there are any hidden obstacles e.g. the auto HRW switch on, etc ?

The Rovering Member · 11th January 2022, 22:43

I would guess that it would be very involved due to different wiring systems, etc....
Probably a lot easier to take fifteen minutes to go over the controls with her. The demist function is only one press of a button after all. Saying that though, even when you're used to the ATC, they can still be a bit fiddly when you're on the move so l know what you mean.

Sonic ZS · 12th January 2022, 06:21

That's a very fair point

I never gave the demist button a thought as for some reason I always set the blower up manually, doing direction, fan speed, temp, etc. as individual settings...

Maybe I'll keep a look out for a cheap scrap Classic, or one in a breakers and see about removing the complete HVAC system

Could be an interesting project

trikey · 12th January 2022, 07:11

I’ve done this swap a couple of times and is fairly straightforward but you do need to remove centre console, full dash, the reinforcement bar that runs behind the dash too and I find it easier when the carpets are out too.

Once you can get to it it’s a case of swapping the full heater box (wiring is the same between both types) then once fitted a T4 session to alter the zcs coding so the car is aware of what you have done.

Easily doable in a day, but you need lots of space!!

Sonic ZS · 12th January 2022, 07:41

Thanks for that Andy, sounds like a fairly straightforward job if everything is done in order and a donor car is available

Just need to find a T4 locally or make a trip across to Norfolk....

Thanks again, much appreciated

trikey · 12th January 2022, 07:43

Quote:

Originally Posted by Sonic ZS

Thanks for that Andy, sounds like a fairly straightforward job if everything is done in order and a donor car is available

Just need to find a T4 locally or make a trip across to Norfolk....

Thanks again, much appreciated

That won’t be a problem should you need it 👍

Sent from my iPhone using Tapatalk

11th January 2022, 13:47	#1
Sonic ZS Posted a thing or two 75 Conn CDT Tourer, 75 Conn SE V6, 75 Conn V6, 75 Conn CDTi Tourer, ZS 180 Join Date: Jan 2014 Location: Devon Posts: 1,986 Thanks: 1,287 Thanked 963 Times in 534 Posts	Swap ATC to manual Air Con - anyone converted ?? As per title really, just wondered if anyone has done this, what's involved, etc. Any thoughts appreciated My partner had to drive my 75 unexpectedly recently and trying to explain by text how the ATC operates was quite a task, when all she really needed was to demist the screen. Hence this post... I've never been too worried about all the various features of the ATC system, would be happy with normal knobs, just wondering if there are any hidden obstacles e.g. the auto HRW switch on, etc ? __________________

11th January 2022, 22:43	#2
The Rovering Member I really should get out more....... Rover 75 saloon Join Date: Feb 2014 Location: London Posts: 2,953 Thanks: 263 Thanked 538 Times in 431 Posts	I would guess that it would be very involved due to different wiring systems, etc.... Probably a lot easier to take fifteen minutes to go over the controls with her. The demist function is only one press of a button after all. Saying that though, even when you're used to the ATC, they can still be a bit fiddly when you're on the move so l know what you mean. __________________ Reducing the size of my Rover fleet by adding a 75 to it.

12th January 2022, 06:21	#3
Sonic ZS Posted a thing or two 75 Conn CDT Tourer, 75 Conn SE V6, 75 Conn V6, 75 Conn CDTi Tourer, ZS 180 Join Date: Jan 2014 Location: Devon Posts: 1,986 Thanks: 1,287 Thanked 963 Times in 534 Posts	That's a very fair point I never gave the demist button a thought as for some reason I always set the blower up manually, doing direction, fan speed, temp, etc. as individual settings... Maybe I'll keep a look out for a cheap scrap Classic, or one in a breakers and see about removing the complete HVAC system Could be an interesting project __________________

12th January 2022, 07:11	#4
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,764 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	I’ve done this swap a couple of times and is fairly straightforward but you do need to remove centre console, full dash, the reinforcement bar that runs behind the dash too and I find it easier when the carpets are out too. Once you can get to it it’s a case of swapping the full heater box (wiring is the same between both types) then once fitted a T4 session to alter the zcs coding so the car is aware of what you have done. Easily doable in a day, but you need lots of space!! __________________ Lest we forget..

12th January 2022, 07:41	#5
Sonic ZS Posted a thing or two 75 Conn CDT Tourer, 75 Conn SE V6, 75 Conn V6, 75 Conn CDTi Tourer, ZS 180 Join Date: Jan 2014 Location: Devon Posts: 1,986 Thanks: 1,287 Thanked 963 Times in 534 Posts	Thanks for that Andy, sounds like a fairly straightforward job if everything is done in order and a donor car is available Just need to find a T4 locally or make a trip across to Norfolk.... Thanks again, much appreciated __________________