Hello all,
I have a strange issue with my replacement heater valve for my V8. I fitted it this morning and everything appeared to work fine - changing the temperature inside the cab made the motor rotate in both directions. However, having switched the ignition off and later restarted the car, the motor now doesn't move regardless of what temperature you set in the cab. I've checked the motor with a 12v supply and it moves without any problem. I've also tested the system for errors and none are reported. I took the motor off my old valve and tested that too but this also doesn't move when connected to the car but does move when connected to a 12v supply. Anyone got any ideas? It's really frustrating as it all worked to start with!

Andy