Gfci clicking, motor pulsing

Likely either a short or a bad gfci. Unplug, disconnect equipment (heater, pump, blower, ozone, etc) one at a time, then plug in to isolate the fault.
Cord-end GFCIs are notorious for problems. If you can, get rid of it.
Any water on electrical components can cause a short and gfci trip, and it's not uncommon to get something wet when filling.
Problems are more likely after a fresh fill due to extended run time of equipment to get it heated up as well as any issues that developed while drained (freeze damage, rodents nesting, etc.). Also, improper fill can cause damage in some spas.
Pics of equipment area, circuit board, and wiring diagram may be helpful.

Pentair Mastertemp 250 Heater Problem

24 VAC comes from the transformer to Pins 3 and 4 (ground) on J7 and to pins 1 and 2 (ground) on J1.

24 VAC leaves pins 1 and 2 (ground) on J1 and goes to the top 24 VAC terminal on the Fenwal ICM and the Ground terminal on the Fenwal ICM.

The Fenwal ICM sends 24 VAC to the VAL terminal on the ICM using a relay and that goes to Pin 5 on J1 (Yellow with red stripe).

You can check for voltage between the top 24 VAC terminal on the Fenwal ICM and the VAL terminal on the ICM when the gas valve is powered.

If the resistance is low, the voltage should be at 24 VAC at both terminals and this will read as 0 volts AC.

If the voltage reads high, then the resistance is likely in the Fenwal.

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The two black boxes are relays.

The top box is the blower relay.

The black box on the right is the valve relay.

The blue box is the ignitor relay.

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We Have a Winner! TFP Pool of the Month (March 2025) - Unique Pool Features

Folks, let's congratulate @Ahultin (Post #3) for being voted as this month's TFP (Unique Pool Features) Pool of the Month. @Ahultin , you have to tell us more about your playground. Looks great. :goodjob:

Check back and we'll do this again next month.

@Ahultin , be on the lookout for your $50 discount code from tfteskits.net.
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I want to upgrade my SWCG - what work is needed?

I currently have a terribly undersized Jandy. I’m in middle Georgia and my pool gets about eight hours of solid sun per day. The RJ60 was recommended. Do I need a professional to install this? An earlier comment confirmed I have 230v electrical. Would any electrical work be needed or is this a basic install? I have a friend who is an electrician and is very handy with pretty much everything, so I have him in mind if a pool professional is not required.

Thanks in advance for your help!

Chip in Plaster

It is a horizontal platform when you first enter the pool
That is spalling of the plaster. It is caused by water freezing on the plaster. In the winter, you need to keep the water level below any ledges or at least an inch above so that ice does not form directly on the plaster.

No good way to repair that so it looks good except to replaster the area.

How old is the pool and plaster?

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Our Gunite Looks Terrible…HELP!

I know close to nothing about gunite shells, and I sure don't want to add to your stress. But based on what I saw them do in my pool, I'd be curious to know why they would be drilling and reapplying concrete to fix "too rough." You saw my pic, and plaster covered all that moonscape. I wonder if they found something other than roughness, but didn't want to tell you what. On the other hand, maybe they're just skimming the surface with a patch of new concrete and the drilling is just to better hold the patch in place.

I guess it comes down to: you either trust these guys or you don't. But I'm not sure it would hurt to ask for more details about what they are doing and why. Just a casual "Just curious, why do you have to drill?" shouldn't put him off.

On the plus side, they were willing to address your concern and fix it, so that's a good sign. (y)

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Small Rust-Through in Pool Wall

Hi,

I have a rusting spot on a 24ft round above ground pool wall. There is a small amount of water leaking through - see picture. This is a little more than halfway up the 4-foot wall. The pool is going to be removed this spring anyway, so I'm not concerned about attempting a repair. I just don't want this to turn into a bigger problem before the removal is done.

My questions are -
1. Do I need to be concerned about the pool wall bursting in the next 4-8ish weeks?
2. If yes - can I drain the pool about halfway and leave it without worrying about wind damage and the like?

Thank you!

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2" Union Cap / Plug Solution?

My multiport valve has a slow leak thru plumbed back flow PVC.

I will be replacing the valve at some point in the next few weeks, but until then it would be nice not to waste water. I am curious if there is a clever solution for using the existing union connection and plugging it without plumbing in a ball valve... ideally a threaded solution.

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