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Hi. Need to top up inhibitor in a sealed central heating system but no records as to what had been previously used. Boiler manufacturer recommends either Sentinel x 100 or Fernox Copal for the Aluminium heat exchanger. Would it matter if topped up with either one, irrespective of what had been...

Hi. Need some advice. Above boiler worked well until some weeks back when it failed and would repeatedly switch to ignition lockout. On well founded advice requested a fixed price repair and an engineer duly came out diagnosed and replaced gas valve and boiler worked fine for a week...

Hi, Can anyone advise where to check to see if gas sensing tube is blocked on Promax boiler and whether this can be done by a non Corgi person ? Thanks.

Hi, Need some help please. A 6yr old Potterton Promax 15HE on an unvented boiler installation has suddenly stopped heating both DHW & CH. Had worked well without issues for 6yrs. Now when reset, fan starts up and runs while boiler does not fire up but has a relay on the ignition PCB clicking in...