Questions & Answers for: pool heater making loud banging

Pool heater works, but smokes and bangs when pool is turned off. Our pool heater works fine when it is on, but we've had two occassions where we turn off the pool pump and the heater makes loud ...

heater is broken. You are looking for a stainless steel plate in the water path. If you can move it by hand, it is broke. It is not replaceable and requires a new heat exchanger assembly to repair it.

pool filter before shutting heater, i recomended shutting heater second. It is normal for the bang on the heater when water flow dont exist. shut heater first then filter. the psi on the gauge is high

...heater. It stopped making the noise and won't heat the water. It now won't light the pilot. I can hear the ignitor ticking but doesn't light pilot Is it leaking? Has anything shaken loose inside? If ...

...heater is making a loud banging noise after the burners kick on. Hot water comes out a little when the banging occurs but water is basically still cold. Mine too today! ...

...making a loud banging noise and then the HS code comes on and it shuts down. the noise continues for about 15 to 30 seconds after the burners shut down, This sounds like a low water flow situation. ...

hayward h250 making a banging noise When heater is on for spa, makes a loud banging noise. low water flow if filter ok check manual bypass and return valves open

...making an intermittent loud sound. All filters are new and spa is clean. What to do? Could be your motor, bearings going bad or whatnot, pump flow being restricted, bad impeller, or the heater. If it ...

...heater starts heating, I can feel the heat coming out, then makes a loud banging noise, then shuts off, and then it keeps trying to restart automatically. No error code appears. if plumbed correct ...