MK2 ATC heater fan controller

[redzed]

needed asap as mines packed in and i have no fan working!

[Enright]

From having converted from normal aircon to ATC, I'm sure the fans are the same - it's just the method of controlling them that's different, if that helps.

[redzed]

From having converted from normal aircon to ATC, I'm sure the fans are the same - it's just the method of controlling them that's different, if that helps.

Not sure what you mean.

[Enright]

The actual fan and it's motor are the same units, no matter whether the car has aircon or ATC. So if it's simply a case of a burnt out motor, then there's nothing special about it - it can be easily sourced and replaced from a non-ATC car.

But the control units for the fan are totally different: with aircon cars there is a resistor pack, and this often fails on the lower settings leaving people with just the higher ones.
On ATC equipped cars the speed of the fan is controlled by a transistor pack - it's roughly the same size as the resistor pack so it fits in the same slot, and it looks like a bunch of about 18 x 2" long rods mounted into a plastic block with an electrical connector.

Then of course it could be the main control panel, or simply the fuse to the entire system.

Have you ruled-out the motor itself as the culprit? do you get anything on the display, or any error codes? Have you tried all speed settings including pressing the de-mist button? The reason for this last question is that it MIGHT (although I'm not sure) bypass the lower voltage control to the motor settings regulated by the transistor pack, so at least giving you full speed. You'll go deaf after a short while but at least it'll prove which components are actually still working!

Hope that helps.

[redzed]

The actual fan and it's motor are the same units, no matter whether the car has aircon or ATC. So if it's simply a case of a burnt out motor, then there's nothing special about it - it can be easily sourced and replaced from a non-ATC car.

But the control units for the fan are totally different: with aircon cars there is a resistor pack, and this often fails on the lower settings leaving people with just the higher ones.
On ATC equipped cars the speed of the fan is controlled by a transistor pack - it's roughly the same size as the resistor pack so it fits in the same slot, and it looks like a bunch of about 18 x 2" long rods mounted into a plastic block with an electrical connector.

Then of course it could be the main control panel, or simply the fuse to the entire system.

Have you ruled-out the motor itself as the culprit? do you get anything on the display, or any error codes? Have you tried all speed settings including pressing the de-mist button? The reason for this last question is that it MIGHT (although I'm not sure) bypass the lower voltage control to the motor settings regulated by the transistor pack, so at least giving you full speed. You'll go deaf after a short while but at least it'll prove which components are actually still working!

Hope that helps.


hi mate its definitely the ATC transistor which has failed as ive put one in from my other zs and it works so i know its that part i just cant find one to buy anywhere!! good that its not a fault anywhere else but annoying as i cant find one, with the weather turning having a heater fan is going to be a must! anyone know of a mk2 being broken?

[Dan1971]

MG ZS STE is breaking his.

[Dr Doggystyle]

maybe you can fix it yourself
here is a how to and what you need

http://forums.xpowerforums.com/showthread.php?t=53042

[Jay-ZS+]

Easy fix, did mine recently cost about £4 lol

[redzed]

nice cheers lads, where would you buy the transistor from?

[Jay-ZS+]

Rs

[Jay-ZS+]

Here you are:
http://uk.rs-online.com/web/p/mosfet-transistors/7481881/

[petet16]

http://www.dmgrs.co.uk/collections/repair-improvement-kits-1/products/mk2-45-zs-atc-transistor-pack-repair-kit-or-service-jgn000010

[redzed]

Here you are:
http://uk.rs-online.com/web/p/mosfet-transistors/7481881/

damn it, just ordered them and theyre wrong!! what the correct type?

[Dr Doggystyle]

i think this is the right one
http://uk.rs-online.com/web/p/mosfet/5430939/
in the how to it says
The transistor code is IRFZ44V

[Jay-ZS+]

i think this is the right one
http://uk.rs-online.com/web/p/mosfet/5430939/
in the how to it says
The transistor code is IRFZ44V

Yer thats the one, sorry linked to the product under the one you needed.

[redzed]

excellent, cheers guys, ordered it so hopefully that will do the job

[redzed]

BUMP! this hasnt worked need the whole unit asap!