Gasguru, guess what. you say....'service log at the back of the manual (for compliance with the warranty)' ???
Checked the back pages of the Installation/Maintenance book, not a single Service record filled in !
Dammit...my fault, I assumed wrongly that the Gas Safety doc sent to me by the...
yep ...worcester on the way tomorrow...
will report .
...meanwhile i can busy myself fixing the fence that blew down at the same time!!!
and no its not the wind blowing across the top of the flue, been happening in still conditions too. if only.
Worcester Greenstar 4000 combi boiler 25kW
Install new September 2021.
Last gas safety check October 3 2023
Combustion reading 0.0003 initial 0.0003 final. (is that very low?)
432kHz Drone, howl, noise from within boiler case.
No pipe / rad knocks.
Boiler located upstairs. External 30mm...