this will be the cable /wire assy whic connects pump microswitches and also links onto the pcb /// the fault wll be the microswitch on the front of the pressure diff unit no click will be heard that is because it thinks that there is a demand for hot water constants so you will get it coming off /on/off/on /new microswitch harness is required 20 min repair tony baxi eng
tony
January 2010
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