The motor is probably at or near the end of its life. It could be that the motor itself has stopped on a "blind spot" on the bushes (poor connection inside the motore means it will not start). You could try tapping it gently with a mallet or a hammer cushioned with a folded towel. Try starting it again by activating the shower. If this does not work, try disconnecting the pump from the water supply (4 pipes) and cleaning the inlet/outlet filters. While out give the pump itself a few gentle taps on a hard surface. This may move the bushes on from a blind spot. Re-assemble he pump and if you are lucky it may work. However, this is unlikely to be a "permanent" repair and may last for only a few days or weeks (depending on the level of use). You will need to replace the unit, unless you can find repair depot.
Chris Johnson, September 2011
