Grundfos UPS Pump - help please.

sealord17

Our Grundfos UPS 15-50 water circulation pump is now running 24 hours a day - even if the heating and hot water are off. I am sure it used to switch off a while after the heating went off - just to keep the water circulating evenly. But now its on all the time? Advice please.

ormus

probably the CH controller at fault.

Canucklehead

|Hi

What boiler do you have?

Corgi Guy

sealord17

Canucklehead wrote: »

|Hi

What boiler do you have?

Corgi Guy

Hi we have a Baxi Solo 2 PF - just been serviced. Funnily enough now it keeps cutting out every so often - for a few mins then re starts even if the wall controlled thermostat has not cut it out though the room / ambient temp reaching the setting.

Canucklehead

Hi

The pump is wired into the boiler electrical connections. There is an overrun to dissipate heat after the system has shut down. You should get someone to check it out. It might need a PCB, or stat.

Corgi Guy

sealord17

Spot on - new PCB being fitted Friday - cheers.