Question about Hayward H-series Electronic Gas Pool Heater H400
If you have an external by-pass it needs to be closed. This will be a valve between the pipes in and out of the heater. When you close it, it forces water through the heater. When it is open no water goes through the heater. So the water in the heater boils and turns to steam. With no where to go it starts banging and jumping.
If you close this valve or it is closed and you still have trouble the internal by-pass has gone bad. The overheating from the first problem will often cause this.
You remove the water header from the side of the heater and pull the pipes from it. In reality you will probably have to pull the gas pipe so you can move the heater from the pipes. You will find the assembly inside the manifold. It will probably come out in pieces but the new one goes back in as a unit.
This will regulate your water flow and keep it heating at a constant temp.
Posted on Nov 20, 2010
If heat exchanger has not been destroyed, you will probably have to deal with calcium buildup or lime build up up internally of that heat exchanger. It can be cleaned. But if it's too far gone, you will have to replace the heat exchanger!, and make sure you identify what the problem of the low water flow was! Then repair it!
Posted on Apr 04, 2015
Heater works but makes a loud howling/roaring noise and it gets louder as it heats up
Posted on Apr 05, 2011
Stop using the heater immediately. You are boiling the water inside and this can lead to a dangerous situation if a limit switch fails to act in time.
You will likely find the diverter in the inlet side of the 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.
Your part number is IDXHXA1101. We sell it as will most pool dealers. If you would like a quote, contact us at www.arrowmotor.net
Posted on Jun 16, 2009
See this page:https://sites.google.com/site/haywardpoolheater/
For info about the part that breaks and how to fix it. YMMV.
Posted on Jan 06, 2012
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