Hi,

I had to replace my Climate Control Unit (P/N 997.653.211.01 FTC) in the center console against a new one. I got the same P/N except that it is now revision 04 instead of my original 01.
My car has auto A/C and seat heating and I am sure I got the right control unit.

When I turned on the ignition the new control unit started blinking showing all possible LCD icons and after about 10s it just showed 22° C. and the only setting I could change was the fan speed. Looks like a "standard" or "emergency" mode. Neither AC on/off nor seat heating or any other button worked.
Swapping back to the original unit gave back the controls except seat heating.

Am I right in assuming that the new control unit needs to be coded first to work properly? Is it possible that by swapping the unit the system deleted e.g. seat heating from the list of built in features in the gateway module?
Any insight would be highly appreciated.

 

The CCU has to be “remarried” (P service shop term) to the car if it is a new unit. Same as a new PCM or an original PCM with a new hard drive installed.

 

Good luck on the cost of the "wedding"...

 

A weddding never is cheap (nor a divorce)

 

To complete the story, so others can benefit going forward.
New control unit needs coding first, we then ran the vehicle handover to wake up the control unit (Not sure it was required).

After that the unit still was blinking when switiching ignition on and a couple of flap motor faults were still unclearable.
With the car's engine running an active motor diganosis on the control unit solved the problem. I am assuming the control unit needs to once learn all the endpoints.

After that blinking was gone and faults could be cleared and did not come back.