‘If your pump starts running more frequently when no taps are running, it indicates a pressure loss’
Technical Consultant IF YOUR WATER pump has stopped cycling but it once did and nothing has changed, it could be an internal mini-pump failure, but first check for blockages in the supply to the pump.
Most modern pumps have a strainer on the inlet pipe that needs checking for debris once a year. It might also be worth poking something down the supply pipe into the tank, especially on mild steel tanks where the outlet pipe spigot can rust internally and partially block the inlet. Such tanks can also shed rust, blacking or cement-wash that blocks the strainer or builds up over the outlet.
If your pump starts running more frequently when no taps are running, it indicates a pressure loss. First check that the calorifier pressure relief valve isn’t dribbling, then look for pipe leaks. Finally, the pump valves might be allowing pressure to leak back to the tank. Before fitting a new pump, try putting a plumber’s flap type non-return valve between the tank and pump.