Recent content by sam73

I have heard a noise like that when the gas valve is getting faulty and the inside pin keep moving in and out, producing the clicking noise. If the gas valve has found to be the origin, check the CH sensor. Sometimes the sensor have problem and start sending wrong temp. signals to the main pcb...

Check for condensing water inside the APS rubber tubes. This usually happen in winter time when the outside temperature drop down and condensing water built up inside the tubes. Alternatevely it could be a Baxi serial problem with the APS

cold water is feeding back trough the shower mixing valve.

I believe the dirty water is the problem. Even if You change the sensor you may have the same problem after a period of time. The debriness could close the sensor pressure hole stopping bloking the water pressure. I suggest you to flush the system down with clean water, add an inhibitor and...