as for intergas having better quality parts. Firstly its too early to tell, secondly you'd think not given that they use a siemens gas valve, only found elsewhere on ferrolis and a fan you can only find elsewhere on a J&S reno, both manufacturers have terrible reliability. Then there is a paddle flow switch which we already know has a habit of sticking and most manufacturers stopped using 10yrs+ ago, that just leaves a Wilo pump...hmm....Vaillant/Glowworm just dumped them for reliability issues...
As for most common part failures on boilers, well it varies depending on boiler, you cant just make some sweeping statement for all boilers. Most common fault on modern WB boilers asfaik is the fan, but Im sure only WB or large scale WB installers will know for sure
As for most common part failures on boilers, well it varies depending on boiler, you cant just make some sweeping statement for all boilers. Most common fault on modern WB boilers asfaik is the fan, but Im sure only WB or large scale WB installers will know for sure