Recent content by RDspaguy

If you use plywood they will stick out farther and you'll see it at the corners. If you're ok with that, do it. I wouldn't try to screw that pvc, it has a tendency to crack unless drilled/countersunk. You might find that a light sanding will refresh the color of the pvc.

There should be one or more diverter valves on the top shoulder of the spa. These divert water flow from one zone to another. Check there. If there are 2 on a single pump, one likely feeds the other, so you can expect some discrepancy without precise valve adjustment. Also, jets draw in air...

No. Nobody has experience at this who doesn't damage good parts. 😉 If you're going to do it, then do it all. You'll likely need frame repair as well as cabinet. That means standing it up and rebuilding the bottom. It's a project, and you may have to remove the pumps, but requires only minimal...

The floor suctions are unfiltered unless you have a pressure filter (you don't). Straight through the pump and back out of the jets. Generally speaking, if it fits through the grate it will come out of the jets. There are exceptions, of course, usually leaf stems or pine needles and such, but I...

Ok. Balboa controls use 2 temp sensors to determine everything. So anything that causes disparate temp readings can cause many different errors. Typically, high temps at the heater are the result of insufficient flow through the heater. The heater turns on and rapidly boils the water in it...

The 501 and 510 are able to operate more stuff than the 500. Verify that your topside is compatible and it should be fine. I recommend a full control system, rather than just replacing the board. You get a new heater, sensors, and topside for less than you'd spend on them individually, and you...

Do the lights on the circuit board also go on/off?

Heat built up on the circuit. Could have started at the main terminal, heater terminal, or relay, but once it got hot enough to melt solder it will burn everything. Could have been a heater short with a faulty gfci breaker too.

I would recommend you compare prices between the circuit board and heater and a new control system. You might find you can get the complete system for around the same $ as buying the two parts separately.

Could be. Do you know the size of the wire to the spa? Nevermind, I see you got it figured out.

I get itchy back from bromine spas, and it is related to the jets. Enough to drive you nuts. Try using the tub without the jets and see if you react.

Have you called your sundance dealer? You have surpassed the average lifespan of your ozone generator. Perhaps that is causing you some issues.

The "moisture barrier" is worth it. If you are in cold climate I recommend a 5" taper. If you get heavy snow get the denser foam.

High ph causes dissolved solids to come out of solution, causing scale and stains, depending on what's in the water. A sand-paper feel is the beginning of scale.

Post pics of circuit board, wiring diagram, and equipment area. If I had to guess, I'd say flow restriction (dirty filter, bad pump, etc).