A few days ago, our boiler (Vaillant ecotec plus 831) started making rattling noises. We called a plumber, who replaced the water sensor and removed some grit found in the pump (the central heating system was power flushed a few months ago).
The boiler now makes a noise similar to a compression engine when working and has shown a string of maintenance codes (in no particular order): S.0 (with a humming sound), S.53, S.54, S.97, S.98 and F.75. I have posted a video here:
What could the problem be?
PS. I've just tried to get some hot water: I got a S.97 then a F.75. Switched off and on again: S.54. Turned off and on again: S.98 with a humming sound...
The boiler now makes a noise similar to a compression engine when working and has shown a string of maintenance codes (in no particular order): S.0 (with a humming sound), S.53, S.54, S.97, S.98 and F.75. I have posted a video here:
What could the problem be?
PS. I've just tried to get some hot water: I got a S.97 then a F.75. Switched off and on again: S.54. Turned off and on again: S.98 with a humming sound...