Spa heating issue, water level suspect

Motozoic

Well-known member
Oct 30, 2018
66
Tucson, AZ
I hammered out an afternoon mountain bike ride and decided the spa would be a nice thing to soak in afterwards last night. I fired up the spa remotely around 6pm (water temp was 50*F) and by 8pm it had only risen to 58*F. I did the typical checks, but noticed that the pool water level was much higher than normal (almost covering the skimmer completely) due to recent rains. The pool and spa are at the same level with a small spillover; there appeared to be significant waterflow in the pool area from the spillover (visible current). I don't recall this normally being the case when I've used the spa previously. Could the issue be the high water level in the pool or might I have a deeper heater related issue?
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
11,675
Northern NJ
I doubt your pool water level had any effect on your spa heating. When in SPA mode valves should turn so the spa water is isolated, the spillover is not running, and the pool water is not being used and does not matter.

You need to look at what your heater is doing.
 

Jimrahbe

Mod Squad
TFP Expert
LifeTime Supporter
Jul 7, 2014
15,355
Bedford, TX
M,

What Allen said, or maybe the valves are not going into the full spa mode and you are still getting the spillover and therefore heating your pool...

Thanks,

Jim R.
 

Motozoic

Well-known member
Oct 30, 2018
66
Tucson, AZ
Thanks. I have 2 controller automated Jandy valves. I believe one of them rotates into a position that redirects the pump flow into the jets exclusively. There are 2 suction grilles inside the spa, but I'm not sure if another valve is needed to get the suction working or that is also actuated by the other valve responsible for powering the jets. I believe the 2nd Jandy valve is responsible for draining the spa, but I could be wrong.

I turned the system on again today and the heater is certainly working, but there is a significant current going into the pool from the spa via the spillover still. The water level appears to still be too high as it's too cold for the water to evaporate off easily this time of year.

There are 3-position switches on each Jandy valve. I have never needed to mess with these, but I could try and see what they do?!
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
11,675
Northern NJ
Your return actuator is not turning if your spillover is active when in SPA mode.

Both actuators, on the suction and return lines, should turn when you change between POOL and SPA modes.

Observe who’s the actuators move when changing modes. Post pics of your plumbing and actuator positions if you need help.
 

Motozoic

Well-known member
Oct 30, 2018
66
Tucson, AZ
Thank you for that. I went out and manually cycled each valve via its 3-position switch to verify they are still working. They are, but one of them, presumably the return actuator, had its 3-position switch in an odd in-between position; it must not have been doing anything. A closer inspection of the area suggests that a critter is actively digging around the area and may have knocked it into this non-functional position. After running the system again I do not see the spillover current anymore.

Shots of the valve positions with the system on and off attached.
 

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