Worcester combi pump runs continuously

[Scott_D]

Went to a worcester 30CDI combi today where the pump keeps running after heating or hot water demand.

I rang worcester and the suggested unplugging the wires to the pump and reconnecting which seems to have done the trick for now

Anyone had this?

 

[cdodds2004]

if it persists I would say its the pcb. or could be a thermistor if it temp controlled pump overrun?
the time I had it wasn't on a Worcester but it was the pcb

 

[Kevin D]

Try the thermistors mate. Both should give a reading of 950 at 100 degrees C