When my heater is on for a few minutes, it heats well, but it bangs and thumps as if air bubbles are running through the heated water. How can I fix this or do I need professional service?
SOURCE: The heater makes a banging sound after the burners
What you have is a water flow problem. The water should be going through the heater but it is by-passing it. The water inside the heater is boiling and trying to expand as steam that makes the banging sound. Their is a internal by pass in the water manifold on the side of the heater. If you take this apart you will find a disc on a spring contraption, if it is stuck open the water goes past the heater but still has pressure to kick the pressure switch and fire the heater. Either clean or replace this assembly. The other thing to check for is an external by-pass. This will be a gate valve bridging the inlet and outlet pipes. If you have one of these it should be 80-90% closed or the water goes through it and creates the same problem. This is not on all systems so don't be alarmed if you don't find it. Good luck.
SOURCE: I have a H100ID1 natural gas heater. For the past
Is it leaking? Has anything shaken loose inside? If you can get it to light the cause and fix for the banging and shaking is here: https://sites.google.com/site/haywardpoolheater/
Takes about 30 minute and you are done, but you have to figure out what else has gone wrong to stop it lighting
SOURCE: i have ahayward H1001D1
If your external by-pass is closed almost all the way then it will be your internal by-pass. You find this assembly inside the water manifold at the side of the heater. Part should be about 70-80 bucks.
It is suppose to regulate the water flow so it has time to heat but not boil. Yours is probally missing the control disc and letting all the water flow past the heater so the water in the heater is boiling and that is the banging you hear. Good luck.
SOURCE: Hayward MILIVOLT H300 BANGING AND POPPING. STILL
Hi,
There are two things that can cause this...
low water flow
mineral build up in heat exchanger
Check and verify water flow through the heater
if that is ok, then the heat exchanger needs to be cleaned
heatman101
SOURCE: Loud noises, shaking, visible white powder in chlorinator
See this page:https://sites.google.com/site/haywardpoolheater/
For info about the part that breaks and how to fix it. YMMV.
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thermal regulator or internal bypass is the problem
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