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