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There are no other symptons that I am aware of. The whole system was installed about 4 years ago and has worked fine until now. I have replaced the motorised valve recently because it was not working. It was a direct replacement for the one that was on there and wired exactly the same.

Boiler is Ideal Classic FF360, the timer is a Honeywell ST699 and there is a Drayton MA1 mid position actuator. The actuator is working and moves the valve through all three positions. When Hot water only is selected on the timer, the acuator moves to the mid position, which is wrong. Could the...

I have tested the valve and it does move freely. When I disconnect the power supply, the actuator does move to the hot water only position, I assume this is its resting place when there is no power. I reconnect the power and select hot water only on the timer and the actuator moves to the mid...

Boiler is Ideal Classic FF360, the timer is a Honeywell ST699 and there is a Drayton MA1 mid position actuator. The problem is that when Hot water only is selected on the timer the central heating comes on as well. So I looked at the actuator and realised that it was not working and replaced it...