Help with combi bolier making very loud noise when working

Questions about central heating and boiler questions in here please.

Moderator: Moderators

Post Reply
trytoDIY
Newly registered Member
Posts: 1
Joined: Mon Jan 30, 2023 11:53 am
Has thanked: 1 time
Been thanked: 0

Help with combi bolier making very loud noise when working

Post by trytoDIY »

Hey, any thoughts on what might be causing a really loud buzzing noise, like an angry bee, that kicks in about 2 hours after the central heating has been on? Vaillant EcoTec Pro combi boiler, serviced with no issues found, the plumber who serviced it was stumped.

Here's a sound clip of the noise the bolier is making (delete the gaps, I dont know why it wont let me upload a sound clip or a link):
https: //voca. ro/19c3XFDlJFHQ

I'd really appreciate any help, we are scared to use the heating, as the noise is so loud and seems like it could be a serious issue.

Thank you!
User avatar
moderator2
UHM Super Moderator
Posts: 4577
Joined: Fri Jan 27, 2006 10:54 pm
Has thanked: 155 times
Been thanked: 569 times

Help with combi bolier making very loud noise when working

Post by moderator2 »

These users thanked the author moderator2 for the post:
trytoDIY (Mon Jan 30, 2023 2:31 pm)
Rating: 7.14%
User avatar
aeromech3
Senior Member
Posts: 3598
Joined: Fri Feb 26, 2010 11:16 am
Location: Ash Surrey
Has thanked: 177 times
Been thanked: 665 times

Help with combi bolier making very loud noise when working

Post by aeromech3 »

Not a Pro but I had a similar noise (different boiler) that made me think my pump was on the way out, it was solved by opening a TRV fully on one of the rads, suggest you open all fully when the noise appears but one at a time to find the culprit.
Post Reply

Return to “Central Heating & Boilers”