?     Asked on 4/26/2015by Inyo Visitor

water shoots out of tube going to pool by thermostate on heat exchanger what is causing that and could it be just a gasket
 Reply

A  Answered on 5/5/2015 by InyoPools Product Specialist Lennox H.

You would have to take the heat exchanger apart to see where its leaking from. You can try replacing the Heat Exchanger Gasket and see if that solve the problem.
 Reply


?     Asked on 5/28/2015by Ronald

When water is going through the heating system it knocks like steam in a radiator when cold water and hot water meets.
 Reply

A  Answered on 6/11/2015 by InyoPools Product Specialist Brian M.

The knocking sound you hear is the water boiling inside the heater. It is generally caused by a lack of water flow through the heater.Clean your pool filter, empty the skimmer basket(s), clean the pump basket, and anything else that might restrict the flow of water though your system.
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?     Asked on 6/25/2015by David Knapton

Heater knocks loudly about 1 minute after being turned on. I have excellent flow through the heater and filter. Had a repair man look at it and he stated that the diverter inside my inlet pipe broke at the welds and that is what I also see. Can this be welded? Or do I need a complete heater exchange assembly. The model number is H1001D1 & ABG1001
 Reply

A  Answered on 6/25/2015 by InyoPools Product Specialist Joe S.

Hello David, it will be best to replace Heat Exchanger, Heat Exchanger, H-series Above Ground (idxhxa1101) Rather they welding a peice in that unit.
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?     Asked on 6/12/2017by Inyo Visitor

I have a hayward pool heater H1001D that I converted to propane. Worked great last year. Now upon started it up, I hear a banging.. I think it's from the tubing of the heat ex-changer where the water pressure switch is and the limit switches are.... What is the problem and the repair, thank's.. Karen
 Reply

A  Answered on 8/5/2017 by InyoPools Product Specialist Alex V.

Hello, A common cause would be insufficient water flow through the heat exchanger. You can try back washing the filter thoroughly and see if that helps. 
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?     Asked on 6/6/2018by Wayne

Do you know the thread size of the 3 holes on the 2 1/2” tubing?
 Reply

A  Answered on 6/6/2018 by InyoPools Product Specialist Lennox H.

Hi, Wayne. This tubing is welded to the large header assembly, only the inlet and outlet ends are threaded. I'm not sure of the thread size. 
 Reply


?     Asked on 6/13/2018by Nancy Fernandez

I have a Hayward H1001D1 pool heater. I have good water flow. The heater is making a clicking noise and the in and out hoses are jumping and pulsating. What causes this?
 Reply

A  Answered on 6/14/2018 by InyoPools Product Specialist Lennox H.

Hi, Nancy. There could be a blockage or build up in the heat exchanger. This is usually caused by unbalanced water chemistry. 
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?     Asked on 5/28/2020by Annmarie

I have a Hayward above ground pool heater model # H100ID1 & I need to replace the heat exchanger. Is this compatible?
 Reply

A  Answered on 10/21/2020 by InyoPools Product Specialist Hector F.

Hi Annmarie, yes this heat exchanger is the correct part for the Hayward heater model H100ID1. 
 Reply


?     Asked on 5/28/2020by Annmarie

I just asked a question but found a photo of the pool heater sticker which I have uploaded. I wanted to know if this heat exchanger is compatible

 Reply

A  Answered on 11/3/2020 by InyoPools Product Specialist Hector F.

Hi Annmarie, yes this is the correct heat exchanger for the Hayward heater model H100ID1. 
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?     Asked on 7/16/2020by Steven Kensinger

Have H100IDP1 and heat exchanger is leaking.My part # is IDXHXA1102 your # is IDXHXA1101. Are these the same exchangers
 Reply

A  Answered on 11/17/2020 by InyoPools Product Specialist Hector F.

Hi Steven, yes this heat exchanger is the current version for the Hayward heater model H100IDP1. Please be advised that this is used only on heaters made before April 16, 2013, Serial Numbers 21131304101440001.
 Reply