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Yes it is a combi, The programmer has a built in room thermostat to control the room temperature, so when the room reaches the require temperature this then turn the heating off. When temperature drops the heating comes on again. When the programmer is set to H/W mode this just allows for hot...

Its an external programmer underwurlde.

Hi everyone, My mother has a 30cx which is 4 years old this is not used very much as mother also lives away sometimes. This is what happens. You put the programmer to call for C/H & H/W The Radiators all get warm and runs normal, when you turn the hot tap on no hot water, this is the tap...

Not sure about the gas pressures was tested when install with water tube & also a 1year ago and within the specs. The fan speed still sound the same when from new start of low then fast with the extra gas input.

Wonder if anyone can help me? Install boiler 2003 been running well apart from replacing pc board 7 Electro spark leads, now for some reason we have this whistle type noise when the boiler goes to cut out(otherwise reaches temperature).Before it cuts out we gt this loud whistle/hum type noise...