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When my furnace starts in the morning, there is a loud boom
When my furnace starts in the morning, there is a loud boom like an explosion in the fire box, what causes this? … read more
Rick
Rick
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I have a Lennox L.P. furnace. Ser.l # 5881GO3611, Model #
I have a Lennox L.P. furnace. Ser.l # 5881GO3611, Model # G1203-110-3, input 110,000 btu's. … read more
gotoman for ac
gotoman for ac
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I have a Weil-McLain CGM hot water boiler with spark
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 boile… read more
Rick
Rick
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I need help diagnosing an issue with a 80% Payne Home
I need help diagnosing an issue with a 80% Payne Bryant Home Natural Gas furnace. iThe problem: Furnace pilot igniter clicks 5 or 6 times and lights pilot light (normal), pilot burns several seconds, … read more
Rick
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coleman m# ***** when igniting it makes a mild boom
coleman m# ***** when igniting it makes a mild boom sound like metal expanding. been doing it for a year. any answers? aswer the damn question!!!!!… read more
Phil
Phil
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Degree, Mech Engr Technology
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Natural Gas Furnace takes a long time to kick on when thermostat
Natural Gas Furnace takes a long time to kick on when thermostat is 10 degrees higher then temp on display! takes nearly 10 to 20 min to kick on! when light operates normally, then after a while flame… read more
D.E. Anderson
D.E. Anderson
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My furnace works fine going through heating cycles upon demand
My furnace works fine going through heating cycles upon demand perfectly for a day or two than out of the blue I hear a loud boom come from the furnace. When checking the furnace there is nothing out … read more
airheatman
airheatman
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I have a Am.Standard GPH Hydronic Gas Furnace,when the burners
I have a Am.Standard GPH Hydronic Gas Furnace,when the burners come on or shut off hearing a loud boom..what could be some of the causes and is this dangerous Thank You… read more
gotoman for ac
gotoman for ac
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I have a Burnham 204H Gas furnace, 2 zone , forced hot water
I have a Burnham 204H Gas furnace, 2 zone , forced hot water unit. It is only four years old. This season it is failing to ignite the gas from anywhere between 30 minutes to two hours. There is no gas… read more
gotoman for ac
gotoman for ac
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I have an old Day-and-Night gas furnace heater in my house.
I have an old Day-and-Night gas furnace heater in my house. It has been working fine for 20 years. Twice within a week, I heard a loud boom when the furnace was in use. I could not tell whether that c… read more
MRANSWER
MRANSWER
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I have a Whisper Heat Lennox furnace which is approximately
I have a Whisper Heat Lennox furnace which is approximately 10 years old. It frequently makes an explosive sound when first starting up. I have had it checked and the technician could not repeat the s… read more
Rick
Rick
Supervisor
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i have a payne air and heating unit, when i turn unit on to
i have a payne air and heating unit, when i turn unit on to heat one burner lights instead of all three, cousing a loud booming sound. what do u think… read more
BillyHvac
BillyHvac
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I have a gas furnace and keep hearing a loud boom type noise
I have a gas furnace and keep hearing a loud boom type noise when it kicks in.. What is that?… read more
Douglas
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I have a Lennox G12 Series, probably from the mid 1990s. A
I have a Lennox G12 Series, probably from the mid 1990s. A few weeks ago, I had the annual cleaning & servicing. The HVAC man said it was old, but working fine. Shortly thereafter, it started making l… read more
G Wurtz
G Wurtz
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I have a Burnham Oil furnace. Lately it makes a muffled boom
I have a Burnham Oil furnace. Lately it makes a muffled boom sound, it is not loud, I do not know how else to describe it, the furnace like hesitates, but keeps on running. It is about 10 years old. M… read more
gotoman for ac
gotoman for ac
HVAC Service manager and owner
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I have an amana 90% gas system in my attic. About every cycle
I have an amana 90% gas system in my attic. About every cycle the unit goes boom and 20 seconds later the unit turns on and then heats well. The board is not showing a code. I have seen the boom as li… read more
Robert
Robert
Associate Degree
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We have a vaillant hydronic furnace that is about 10 years
We have a vaillant hydronic furnace that is about 10 years old. Last year it began to boom just before the electronic ignition kick in. We had a furnace company look at it and it appeared to be fixed.… read more
Rick
Rick
Supervisor
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I have two 1990 era propane furnaces in my two story house.
I have two 1990 era propane furnaces in my two story house. On one of them, when I turn on the heat setting on the thermostat there is a loud boom noise and then the furnace runs fine. After the tempe… read more
Robert
Robert
Associate Degree
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Phil

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Tom

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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