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Hello I wonder if anyone can offer any advice. My usually good 3 year old combi suddenly refused to run, from power up with mode switch on off, it starts the fan and I hear the APS click, at the same time LED flashes red/yellow 4 times before going solid red. I have checked water...

Hello, I wonder if anybody could give me a bit of advice, my Modena is 10 years old and has been giving a little trouble recently, locking out when DHW is turned on. Yesterday it has developed a new fault, DHW is working fine, but when CH tries to light it is going through the motions, ie...