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Have had an Intergas SB30 installed since march 2013. During this very cold period, yesterday morning the boiler cut out. What was happening was the Operating Code showed 4 for a short time dropping down to 3, repeating this several times then cutting out, the Temperature Display showing 4...

HW off, CH on. When the thermostat trips out there is a very loud bang in the system. This does not happen every time but always happens when tripping out. Bled the system, all radiator valves open, boiler 4 years old. Any ideas?

I'm replacing a monobloc mixer tap with new. Do I need a non-return valve in the pipework and if so which pipe, the Hot or the cold. There isn't one in the existing pipework. Regards

What are the pros & cons of S plan as against Y plan

Saunier Duval SB30e I have had this problem for over a year with a competent CH man visiting 6 times and not being able to sort the problem. Just to explain that when the system calls for heat or HW the boiler starts up then after a few seconds goes to lock-out. Previously with the pump on the...

Saunier Duval SB30e boiler Drayton MA1 3way Valve Sunvic SZ2301 2way Valve On my system between the 3 way valve and the HW cylinder there is a 2 way valve. The problem is more times than not there is a hell of a bang from the 3 way valve when HW is called for as if the 2way is fighting the...

Sometimes when the CH or HW calls for heat the fan comes on and just as the boiler fires it goes to lock-out. Replaced circuit board, ingnitors, temp sensor and presure diff sensor. One thing that also happens now and again is that there is a bang as if a valve is sticking. (Have replaced the...