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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...

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...