pump wont stop running on combi

[happyjack]

Just last night I've noticed the pump is running all the time. It's a glow worm compact 80e. Heating hasn't been on all summer just the water. The room stat is working fine. I still get hot water but the pump is on whether water is on demand or not. The water isn't circulating around the radiators and the heating wont switch on if I try and switch it at the combi but the pump still keeps running.

Does anyone know what would cause this to happen.

 

[ChrisR]

Check if Domestic hot water flow switch stuck on. May have water in it if there's a small leak.

 

[happyjack]

Thanks Chris

Just unclipped microswitch and the plunger on the flow switch head was jammed sticking out. Just touched it and it's popped back in and the pump is now off as normal.

Cheers mate