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Well, I ordered a new Exhaust Gas Temp sensor from Amazon to try it out "just in case." I figured for $15 I might as well try it, though I had low hopes. After changing out the sensor, the heater ran fine! So, despite the heater being new, the sensor was bad. The "old" sensor did have a...

It is wired for 120 volts, and I did change the jumper before I fired it up. I will double check the voltage coming in. Thanks for the suggestion.

I am 100% certain it is the exhaust gas temperature limit switch. I disconnected the switch wires, placed a jumper wire across the leads, and then connected my multimeter to the exhaust gas limit switch. I then ran the heater. At the expected time, the multimeter indicated the exhaust gas...

I am replacing all of the old pool equipment at my new house with Hayward equipment. I have tried to install a brand new Hayward heater model W3H250FDP that keeps throwing a LO code. I have checked everything I know to check based on searches on this site and the Hayward diagnostic manual, and...

I know this is an old thread, but I have discovered through trial and error the definitive answer to "where to put the flow switch" so I am leaving breadcrumbs for others... If using an OmniHub and a separate AquaRite control box, the flow switch needs to be connected to the AquaRite. In...