Thanks, that's the one!
It's in a flat I rent out so haven't actually seen if the pump is running on.
Might try and switch to pump b inside control box to get it working for now and then maybe get a service afterwards, was quoted £275+ vat today by grundfos euro pump.
Thanks for your reply Tony.
Not sure of the model number but it was purchased and installed in 2006.
I haven't had it serviced due to the massive cost that euro pump charge.
It does fortunately have a bypass!
Thanks
I have a Grundfos Home Booster and the water pressure has just significantly dropped.
The display shows Status S, Pump Fault below 0.5 bar, Call Service
Does anyone know what this might be?
Thanks