Dunkirk Quantum 90 - Loud Banging

BattleofDunkirk

I just moved into a 22 year old house with a Dunkirk Quantum 90 Gas fired direct vent heating system. Last night it started making a banging noise so loud I thought the thing was exploding. The whole system and connected pipes shake visibly when it happens. Our home warranty company sent a guy to look at it who said it's perfectly safe and just needs to be cleaned, which I don't buy for a second. He said it's slow to fire, and when it does it goes off like a bomb. He turned it on and it's providing heat but booms and bangs every time it fires up. We can't get any service for a couple of days, so my wife and kids are home with the auto-bomb.

If anyone has any experience with these units I'd love their opinion.

Jamie Hall

Sounds to me like delayed ignition -- which could have a number of causes, but is not good. You need to get a really qualified tech. out there to take a look and probably clean and certainly adjust things so it doesn't do that.

EBEBRATT-Ed

Strongly recommend you have someone qualified look at this asap

jimct

Forget your home warranty company (which contracts with the lowest bidder rather than the most qualified) and find a local pro who can fix this . Remember that the contractors hired by a home warranty company are working for warranty company and not you. The home warranty company profit is the motive and the fewer or cheapest repairs than can do maximizes that .

john p_2

Did you resolve the boom noise? If not, type UB-90 in the search box at the top right side of this page and you may be enlightened. I had a Utica UB-90 which I believe is the same boiler, same issue.