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Rick, HVAC Supervisor
Category: HVAC
Satisfied Customers: 21532
Experience:  40+ yrs. experience as a licensed oil & gas technician.
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I have a Weil-McLain CGM hot water boiler with spark

Customer Question

Hi, I have a Weil-McLain CGM hot water boiler with spark ignition. evert once and a while I get a delayed ignition with a boom. it happen more when its very cold out or at night. I can cycle the boiler 10 times or more and it will not happen while Im looking at it. Any suggestion on what is the cause?
JA: Thanks. Can you give me any more details about your issue?
Customer: I get a delayed light off and I hear a BOOM from a gas build up in the burner box.
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Submitted: 1 year ago.
Category: HVAC
Expert:  Rick replied 1 year ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

Delayed ignition is typically caused by dirty burners. So cleaning the burners is the first thing to do.