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JJ_Tex, I agree. I have no intention to leave the heater on if we experience more cold weather, but as I said, it was just for a few days because I opened this pool for a customer a few weeks ago and he was intent on having the spa running, and making an extra trip to change the settings on the...

1poolman1 I told the homeowner not to mess with the switches, he had done so in the past not knowing what they did. The actuators have been functioning fine since their opening a few weeks ago, but it seems like the return side actuator fails every so often, and I'll get a call saying the pump...

The heater is included because they want to use the spa. The pool was opened a few weeks ago. We just got cold weather this week.

Pool is automated through a hayward panel. Freeze protect switches between pool and spa mode every 30 minutes. Actuators on pool and spa valves. For the past few days below freezing, it has gone back and forth from pool to spa mode. Spa mode kicks in the heater so the water in there is toasty...

I would not reset it. Do you know who installed it? Where are you located? I think you might need to get a pool pro out to help you go over your new home equipment, if not to hire someone to take care of it for you. At least to instruct you on how to use it.

Final update: I got this heater running The existing high limit sensor was rusted out and broken off inside the socket. Not sure why the fault wasn't coming through on the heater UI, but after testing voltage across the pins on the control board for the high limit switch, only getting about 6v...

Got this replacement for the high limit harness for cheaper than the individual sensors. I'll replace it tomorrow and update.

I replaced the fuse link on the bottom by the blowers. I wasn't able to get the blower to start after this. Even after replacing the original fuse link, I didn't have blower action. Only when I jumped the 2 black wires on the PIB, for the high limit, I was actually able to get the blower...

Could this be due to one of the Temp Limit fusible links? I read on google a solution to a problem with similar issues, he stated "So, it ended up being an "open" vent box fusible link, I used quotations because it was not an OL open, but just enough resistance that it would not throw the...

Today I replaced the valve relay but still have the same issue. The relay clicks on after around 30 seconds, but only has 6-8 volts instead 24. It goes back to 0v after a few seconds, and this process repeats a few more times over the next 3 minutes. The igniter lights up each time and is...

Thanks JamesW I believe the issue is with the valve relay since there's no voltage to the valve. I ordered a replacement

I went out to this pool today and switched the wires on the Fenwal. It definitely was wired incorrectly. I started the pool pump, and the heater blower started. No air flow fault, and it went into the next phase of trying to ignite. The igniter came on, but no gas. Looking through the sight...

I haven't been back out to this job yet, but I was looking around and I think I may have found the issue. On my posted photo above of the fenwal, the wiring for PS and FS seem to be reversed, based on this diagram I found:

The blower starts up fine, and I did test the air flow switch while it was running. It had enough to engage it. When testing for 24v on the gas valve, should that be constant, or only during the ignition?

Hello, I hope there's a heater expert that can help me here! I'm trying to diagnose a customer's Jandy LXI pool/spa heater. Customer says the heater doesn't work. On visual inspection, the heater is in good repair, minor wear on the outside of the unit. Wiring and plumbing are clean and leak...