Sport Climate control

Drivers side getting nice and hot but passenger side only blowing barely warm air, any ideas ? 2010 RR Sport HSE 3ltr diesel

Blend valves sticking or something I'd imagine.
You may want to get it on some diag.

Blend valves are just motorised flaps (hello Alan), and they can either wear out or jump a cog, or merely refuse to converse.

Aha and no doubt all hidden and requires removal of all dash to get to Would a blow through with airline do any damage ? Just to see if there's a bit of dirt or something obstructing said flap. Is there a self diag I can do ?
Thanks for your reply

Not all the dash.
Yours is the facelift I think so may differ.

Is your cabin filter in good nick?

That was going to be my next question where is the cabin filter ? And yes mine is the facelift model. Thanks

Even for a technophobe like me, Google is my bestest ever friend. I ask the question then sift through the dross.

Thanks a lot for your help gonna take out filter and give vents a blow through with airline tomorr just in case there's a creepy crawly stuck in the flap. Cheers again mate

Had the pollen filter out which was a little dirty Anyway cycled through all settings a few times and used airline down vents. Gets quite a bit warmer now although not as hot as drivers side but still much better. Probably look to stripping blend motor/flaps but not until much warmer weather, me being a bit nesh .Thanks for your help myfirstl322

You'll need supple fingers and joints going into the dash, I couldn't think of a worse job at this time of year.

Are your heated seats and steering wheel toasty?