Hotwater no heating

[SpoonBender]

I have a problem with my heating.

After the circulation pump the pipe splits. One direction goes to the hot water tank and the other to the radiators. After the split there is an actuator on each pipe.

If I turn on the hot water the actuator on the hot water pipe switches on and then the pump switches on.

If I turn on the heating the actuator on the radiators pipe switches on but the pump does not.

Currently the only way to have the heating on is to put the hot water and heating on at the same time. Is this an electrical fault?

 

[kevplumb]

sounds promising

 

[chrishutt]

Sounds like the micro switch on the heating motorised valve is not operating. Normally this switch will connect live to the pump and boiler supply. As the motorised valve opens, a cam moves against this switch.

 

[SpoonBender]

Spot on. Thanks very much. Replaced motor and now ok!