On my 2012 Westie if I select the button on the dash to give controls to the rear passengers it only blows cold air is there a way to check the blend motor via my gap tool or any other way if testing it 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

I assume the rear is set to hot?
How hot does the front get?

Yes rear set to hot front about 22deg I tried it yesterday unless the ac is turned off and you want warm up front the rear doesn’t get warm 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

I had an issue where the rear wouldn't get hot. (Mine has 4 zone climate)
The front was warm but not hot.

Turned out it was the changeover valve for FBH.