M
Mr F22
F22 / low system pressure.
Do you have a boiler manual? As fault codes will be located in the back of the book.
Pushing the button to check the system pressure should not effect that.
As a rule, I allow 0.4 bar rise on the gauge when the heating is on ( the pump on) give or take 0.1 bar.
As cjg said water expands when heated.
For example let's say at rest the boiler reads 1.2 bar and when the heating is on, it goes upto 1.6 bar or 1.7 bar.
Anything higher that 0.7 bar rise ( say 1.2bar to 2bar) will most likely mean your expansion vessel hasn't got the correct charge.
It may well be that you have a slight leak somewhere on the system, causing the low pressure over X amount days.
Or that it just requires topping up the system pressure via the filling loop, to 1.2 bar at rest. Not left on 0.8bar.
Do you have a boiler manual? As fault codes will be located in the back of the book.
Pushing the button to check the system pressure should not effect that.
As a rule, I allow 0.4 bar rise on the gauge when the heating is on ( the pump on) give or take 0.1 bar.
As cjg said water expands when heated.
For example let's say at rest the boiler reads 1.2 bar and when the heating is on, it goes upto 1.6 bar or 1.7 bar.
Anything higher that 0.7 bar rise ( say 1.2bar to 2bar) will most likely mean your expansion vessel hasn't got the correct charge.
It may well be that you have a slight leak somewhere on the system, causing the low pressure over X amount days.
Or that it just requires topping up the system pressure via the filling loop, to 1.2 bar at rest. Not left on 0.8bar.