The sand seems ok, but probably do a deep clean when I replace the top o-ring gasket to the multiport valve as it drips a drop of water every couple of hours.
the heater is also the timer and all seems to be in order but I have not fired it yet.
Before replacing the seal, try wiping it clean and LIGHTLY coating it with a teflon based lubricant, such as Magic Lube. Be sure when reinstalling to tighten evenly, alternating sides when tightening down and tap the outer retaining ring with the screw driver periodically as you tighten it down to help seat the o-ring. Worked for me last time I had a small leak.