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Black stains on an indoor ceiling (C) Daniel FriedmanBanging Noises from Heating System
Diagnose & cure heater bangs & booms

  • POST a QUESTION or COMMENT about explosive type bangs or booms from any type of heating equipment or the heat distribution by pipes or ducts

This article describes the cause & cures for bangs or booms coming from the heating system.

 

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Banging Heating System Noises

Photograph of this gas flame which gives a clue that there may be an operating problem and an unsafe gas furnace in this building Watch Out: while some bangs and booms are normal or not dangerous, such as duct noises, banging booming coming from an oil burner can indicate a dangerous OIL BURNER PUFFBACK

And a banging explosive start to a gas burner is equally dangerous.

See GAS BURNER FLAME & NOISE DEFECTS

and GAS BURNER POPPING NOISES

At the end of this page we give an index to banging or booming noise sources for heating, ventilating, or cooling systems.

Common Heating System Banging or Booming Noise Sources

Blower fans and air handler components  can induce vibration into buillding ductwork, walls, floors, ceilings that may sound like a bang when equipment turns on or off.

Sheet metal ductwork or cabinets around heating equipment may make a bang or clank sound in response to thermal movement as the metal heats or cools, or in response to the pressurization and de-pressurization as blower fans start and stop.

Loose ductwork or air handler doors or panels or simply under-sized air ducts can also bang or clank as fans turn on or off.

See details at BANGING NOISE at AIR HANDLERS or in DUCT SYSTEMS

and at OIL BURNER CLANKING RATTLING NOISE

and at DUCT SYSTEM NOISES

Oil Burner Banging Noises

Leaky oil piping (C) Daniel Friedman(Mar 24, 2014) Anonymous said: Camray boiler keeps making banging noises

my oil fired Camray boiler keeps making banging noises. what is the cause of this. This boiler is an outside wall mounted boiler

Reply:

Anon,

Watch out: "Banging" noises inside an oil burner / boiler might be a sign of improper burner operation and risk a dangerous Puffback.

Because puffbacks can be caused by a variety of problems (oil piping line leaks, dirty oil burner nozzle assembly, fuel or combustion air problems, simply failure to maintain the system) a trained service technician is needed.

See OIL BURNER SOOT & PUFFBACKS

Also see BANGING BOOMING NOISE DIAGNOSIS & CURE - home

(Nov 21, 2017) Jcurrie said: backfire after furnace shuts off is that dangerous ?

Backfire every time oil furnace shuts off after heating . Not running the furnace fan on continuous just on auto . No odour no spit etc but the backfire after furnace shuts off is that dangerous ?

Reply:

Yes.

With just a smidgen of information I can only guess that your oil burner is not shutting down correctly and is dribbling some in completely burned fuel into the combustion chamber the end of a heating cycle. That's risking a dangerous puffback explosion.

There could be several causes such as a leak in the oil lines, air in the system, or a fuel shut off valve that doesn't close properly in the oil pump.

You need help from a oil heat service technician.

Watch out: See OIL BURNER SOOT & PUFFBACKS

Question: banging boiler

Oct 4, 2015) keith said:

Peerless boiler (oil) after thorough cleaning is banging when it fires. major rumbling noise. totally frustrated

Reply:

See BLEVE EXPLOSIONS as that's what you're heading for.

Watch out: what you describe is unsafe.

also

 


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