20 Most Recent Hayward 100,000 BTU Pool Heater H100ID1 - Above Ground Questions & Answers


Could anyone tell me where on the control panel I would find the Diode D1 on the board?
"agreed; it's usually the diode D1 on the board...a 75 cent part"

Hayward 100,000... | Answered on Jul 23, 2018


VERY low water flow!
Or... No water flow.
This heater as all heaters do, need to have sufficient water flow thru them, or else they Bang like this.
This then creates a problem, for future banging - due to lime up!
The minimal water flow gets so Overheated, that it turns to steam! The steam knocks and pushes the heater around, then the Minerals will precipitate out of the water and forcefully attach to the inside walls of the heat exchanger! Which will then drastically reduce the inner diameter of the exchanger making a much smaller passageway for water to travel thru! This is a major problem to remain this way. It will then need to be dismantled and de-limed to increase the holes once more, and allow a proper water flow.

Hayward 100,000... | Answered on Nov 29, 2017


all the warranties are based on the PROPER MAINTENANCE OF WATER CHEMISTRY. if you cannot prove that the water was balanced properly, you will not have a good time passing this through warranty. a severely unbalanced pool can experience this type of failure very quickly.

Hayward 100,000... | Answered on Dec 20, 2015


there are a variety of causes for this. any one of the safety systems may have detected a fault and thus wont let the heater run. if there is no electricity, the heater wont run. if there is insufficient water flow, the heater wont run.

Hayward 100,000... | Answered on Dec 20, 2015


Need to be more specific...!
what is it doing?
Is there a pilot?
is it burning?
do you hear any clicking or buzzing?
is it plugged in?
is gas valve on?
is main fuel supply valve open?
is the door on & in place?
It needs tone in place!

Hayward 100,000... | Answered on Apr 04, 2015


if new heater and wired 120 volt check wiring try to reverse sounds like not showing rectification if old unit bad flame sensor

Hayward 100,000... | Answered on Oct 04, 2014

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