i need some advice\help with my central heating, please

[deniance]

update, boiler engineer came today, wow very impressed, brill service ands seemed very competent, very happy, boiler was fully stripped, fan valves burners etc all hoovered, dripping filler loop replaced, washer or seal on actuator valve or something that has a pin that goes up and down was replaced, he then fired it up, connected a multimeter with a clear air pipe to the thing next to the gas valve, and it was reading 16.8, with my hot tap on, he said it should be 10, and whoever fitted the gas valve, had left it set to max or lpg setting from New, which could explain my high gas bill, he said everything is fine and he would see me next year, so thanks to all of you guys I'm.a happy bunny cheers Danny

 

[deniance]

Oh, and he pumped up the spare wheel at the back of the boiler, with a bicycle pump, just got in from work been fiddling with rads and taps and shower, hot water yes, shower yes, heating yes, no more buzzing or humming and no more random firing of the boiler, yes yes yes, ariston are the best by far so nerrrrrrrrrrrrrr