Vailant combi boiler question
Posted: January 24th, 2021, 10:50 pm
Our Vailant combie boiler is randomly making banging noise which only occur when the hot water is running for a while, such as when using the shower.
When the noises first started I called our maintenance company to check and their chap said that it was probably a propellor banging against the side of its casing, he made some adjustments that seemed to do the trick. At the last annual service, September 2020, I mentioned the issue to the person of the maintenance company that did the service but he couldn't find anything wrong. Recently the noises have returned so someone else from the maintenance company inspected - a reputable company - and, allowing for the fact he couldn't replicate the noise, he reckons it is the heat exchanger becoming too hot when the hot water has been running for some time. Part of the reason also might be gunge in the pipework.
The boiler is about 14 years old. The recommendation is to get a new boiler, Bosch (the maintenance company are accredited suppliers and installers) and have the radiators power-washed.
Assuming it is the heat exchanger (the larger of the two) and allowing for the age of the boiler would you think it more economical in the long run to get a new boiler (Bosch are offering a free 12 year guarantee) than replace the heat exchanger in the Vailant?
Power washing the radiators seems sensible, they've never been done since installation when the property was built in 1999.
When the noises first started I called our maintenance company to check and their chap said that it was probably a propellor banging against the side of its casing, he made some adjustments that seemed to do the trick. At the last annual service, September 2020, I mentioned the issue to the person of the maintenance company that did the service but he couldn't find anything wrong. Recently the noises have returned so someone else from the maintenance company inspected - a reputable company - and, allowing for the fact he couldn't replicate the noise, he reckons it is the heat exchanger becoming too hot when the hot water has been running for some time. Part of the reason also might be gunge in the pipework.
The boiler is about 14 years old. The recommendation is to get a new boiler, Bosch (the maintenance company are accredited suppliers and installers) and have the radiators power-washed.
Assuming it is the heat exchanger (the larger of the two) and allowing for the age of the boiler would you think it more economical in the long run to get a new boiler (Bosch are offering a free 12 year guarantee) than replace the heat exchanger in the Vailant?
Power washing the radiators seems sensible, they've never been done since installation when the property was built in 1999.