I have two port valves controlling water and heating. One of the valves (water) when closed is still sending a live to the boiler and pump. The micro switch must be sticking. I noticed that the orange wires are connected to permanent live and the grey wires to boiler/pump. According to the actuator diagram they should be the other way round. Has this caused the problem I am having with the micro switch or doesn't it matter. I have swapped the wires round. Or is it that the actuator has come to the end of it's life and is ready for changing. The make of the valves is Ikon, part of a Travis Perkins control pack in 2001 when the house was built. The system is oil fired and I have lived in the house for 2 years.