Warmflow Utility 90 with Drayton controller problem.....

[PaulMullan]

Hi everyone, I've recently noticed that sometimes when my heating and water heating modes are turned completely at the Drayton control panel and the indicator lights are off that the pump continues to run and the burner still cuts in..... sometimes it's fine and cuts off when switched off.

Does anyone know what would be causing this?

Thanks in advance, Paul

 

[PaulMullan]

By the way, I checked both actuator valves and the lever is switching from side to side ok when the heating/water heater are switched on and off, although sometimes the burner and pump continue to receive power..... would it be possible that the interior microswitches could be faulty in the actuator?

 

[SimonG]

Sticking micro switch. Time to get the testers out.

 

[Best]

Fed up with them doing same. Faulty micro switch usually, or mechanically holding switch on.