harv1963

7 minutes ago, harv1963 said:

Could be either. I took the valve out and tested it on a workbench with a 12v battery which confirmed that both solenoids were activating. This proved it was the wiring. 

7 minutes ago, harv1963 said:

Could be either. I took the valve out and tested it on a workbench with a 12v battery which confirmed that both solenoids were activating. This proved it was the wiring. 

When taking out valve have some wine corks handy and insert them into hoses to stop fluid leaking out

Sorry, I dont know.

13 hours ago, gr1 said:

I have a 2006 s type diesel drivers side very hot passenger side works with aircon blows cold if set cold drivers side red hot. would you say this could be a broken wire rather than the valve fault

Could be either. I took the valve out and tested it on a workbench with a 12v battery which confirmed that both solenoids were activating. This proved it was the wiring.