Hi,
I have a Biasi Riva compact HE combi boiler, approximately 6 years old. We moved in about 4 years ago and had no problems with it till recently
About 9 months ago we had a problem with the timer not working, a plumber came out and just turned it off at the plug and reset it and it was all fine.
Shortly afterwards, I’m not sure if was related, the boiler started making some low humming noises, that the suddenly crescendoed and went. Over the past 6 months that has increased significantly – to the point where it lasts over 2 minutes and happens 4 or more times a day, typically in the evening (when we are usually in) after 7pm. It happens when the heating is on or off, and regardless of hot water use. The noise sounds like it is humming for a couple of minutes then suddenly building up pressure for a few seconds then suddenly releases it – the noise comes from the boiler, not any radiators. The missus describes it as like a jet taking off.
We called out a plumber who said the heat exchanger would need replacing. I wasn’t in at the time but the missus said he had a poke about and then left and is giving us a quote for replacing the heat exchanger (£400) and fitting a new boiler (£1200 - £1800 dependant on type and length of warranty). Anyway, after he left the boiler never made the noise since for 3 nights in a row, the one thing I noticed is that he must have increased the pressure as it used to sit below 1 bar when the heating was off, but is now at about 1.2/3.
Tonight though it made the noise 3 times, 7pm about 8pm and 9pm. The heating hasn’t been on since 6.15pm and we haven’t used the hot water. I also noticed the pressure had dropped again below 1 bar, I’m hesitant to up the pressure as I’m not 100% sure which lever to release!
Anyway, wondered if anyone could shed any light on the noise? The actual boiler itself seems to work fine.
Thanks in advance for any advice.
I have a Biasi Riva compact HE combi boiler, approximately 6 years old. We moved in about 4 years ago and had no problems with it till recently
About 9 months ago we had a problem with the timer not working, a plumber came out and just turned it off at the plug and reset it and it was all fine.
Shortly afterwards, I’m not sure if was related, the boiler started making some low humming noises, that the suddenly crescendoed and went. Over the past 6 months that has increased significantly – to the point where it lasts over 2 minutes and happens 4 or more times a day, typically in the evening (when we are usually in) after 7pm. It happens when the heating is on or off, and regardless of hot water use. The noise sounds like it is humming for a couple of minutes then suddenly building up pressure for a few seconds then suddenly releases it – the noise comes from the boiler, not any radiators. The missus describes it as like a jet taking off.
We called out a plumber who said the heat exchanger would need replacing. I wasn’t in at the time but the missus said he had a poke about and then left and is giving us a quote for replacing the heat exchanger (£400) and fitting a new boiler (£1200 - £1800 dependant on type and length of warranty). Anyway, after he left the boiler never made the noise since for 3 nights in a row, the one thing I noticed is that he must have increased the pressure as it used to sit below 1 bar when the heating was off, but is now at about 1.2/3.
Tonight though it made the noise 3 times, 7pm about 8pm and 9pm. The heating hasn’t been on since 6.15pm and we haven’t used the hot water. I also noticed the pressure had dropped again below 1 bar, I’m hesitant to up the pressure as I’m not 100% sure which lever to release!
Anyway, wondered if anyone could shed any light on the noise? The actual boiler itself seems to work fine.
Thanks in advance for any advice.