We recently had fitted a Salamander CT50+ shower pump. It is located in the kitchen, next to the hot water cylinder, which is below the bathroom. When we turned the shower pump on, it would not come on unless we turned the thermostat from hot to cold or "flicked" the actual shower pump. We therefore had the pump replaced (by the same people who installed the first one) and the problem has occurred again (but it is not continuous, sometimes it works and sometimes it doesn't).
It may not be relevant but the pressure of the hot water tap in the kitchen is low and we wondered whether there was any connection.
Any help solving this problem greatly appreciated.