Our Potterton Performa 24 combi boiler sounds like an aeroplane going over when it first kicks on for HW and or CH. Once you get the boiler running the noise eases off to silence until you turn off the HW or turn off the CH when it groans to a halt (is that the fan making the noise???).
The boiler is about 10 years old and has been solid apart from a replaced diaphragm 2 months ago.
I recently used Wickes rad cleaner (blue label) which I left in for a week after draining down the whole system (5 rads in total) and then put in the Wickes inhibitor (red label). That was the first clean I think the system has had for about 7 years at least..... I was very surprised that the water was as clear as it was when I drained it and there was hardly any bits or rubbish in the water either????
Pressure is at 1.5 and I've been round and bled all the rads to eliminate pressure in the system.
Could it be air in the boiler or has the sludge got into the bolier from the cleaning???
All help/comments appreciated
The boiler is about 10 years old and has been solid apart from a replaced diaphragm 2 months ago.
I recently used Wickes rad cleaner (blue label) which I left in for a week after draining down the whole system (5 rads in total) and then put in the Wickes inhibitor (red label). That was the first clean I think the system has had for about 7 years at least..... I was very surprised that the water was as clear as it was when I drained it and there was hardly any bits or rubbish in the water either????
Pressure is at 1.5 and I've been round and bled all the rads to eliminate pressure in the system.
Could it be air in the boiler or has the sludge got into the bolier from the cleaning???
All help/comments appreciated