Hi all,
I thought I would share my findings with you guys in USA about a fault with the blend motor as I think this is a new one on here.

I have just had my a.c regased as I didn't think it was as cold as it should be. It was done by a vehicle a.c professional.
All went well with the regas and everything working as it should under the bonnet but he did notice that then the climate is set to face vents there was not much air flow.
After a good play with the settings we worked out that you can't stop the air blowing out of feet vents no matter that settings it's set on.

So I'm thinking the blend motor on feet vent is not working and stick on open.

So removed the glove box and here's the feet vent blend motor -

 

I removed the motor and with it still plugged in I went through all the climate settings to find the motor dead so I plugged in a spare one which I removed from my last S which was scrapped. But again no movement then going through climate settings so it's 1 of 2 faults, 1- both motors are dead or there's a fault within the RCCM.

So I opened the motor up to have a look -








So after having a good look at the wiring details I checked the power feds to the motor and found no power, also checked at RCCM end and it was the same, so checked the signal feds from RCCM and yes it's got 5v going to it, next checked the position feedback variable voltage and found 2.2 volts. So I removed the motor (still plugged in) and popped it's cover off and removed one of the wheels so I could turn the wheel has the tracks on it.

I then slowly spun the wheel and watched the volts change from 1-5 volts but still motor didn't power up. So now I'm sure the blend motor is ok.

So I removed the RCCM and found this -



I then soldered a small wire across the burnt track -



Here's the board with the last repair (burnt track on heater valve)-



And now the feet blend/climate control is working as it should!

Don't know why the track had burnt out as there is no other faults!

Thanks for reading!

Is this the 1st case of a blent motor burnt track in the RCCM?

 

Wow, never heard of that problem before.

You deserve thanks for your methodical investigation, good photos and clear write-up.

 

Thanks, I posted details so it may help someone in the future.

Cheers.