837. Support: SpaGuts Pneumatic Spa Controller is overheating the spa water.

You have reported that our pneumatic spa controller is overheating the spa water. 1) Make sure the New Hi-Limit and Temperature Sensors under the metal heater thermal cover plate are fully seated against the heater, and the wing nut is tighten. 2) Make sure the New Hi-Limit and Temperature Sensors are fully inserted within the metal heater thermal cover plate, and not exposed to air temperature. The air temperature may allow the sensors to think the water is not hot enough, and needs to continue heating. You can try spray foaming each end of the metal heater thermal cover plate to reduce air temperature from getting to the sensors. 3) If using a topside command center that has a temperature dial, go ahead and unplug the topside command cord from the controller box, and only use the temperature dial on the front cover of the controller box to see if the spa will still overheat. 4) Make sure the primary heat pump that flows water through the heater is running on low speed for the heat and filter cycles. If not, reverse the low and high speed wires. Running on high speed will increase extra heat to the motor. 5) Make sure the pump is not running too long on the filter cycle. Longer run time on a jet pump will also add extra heat to the spa water. 6) NOTE that if the air temperature is hot outside, the spa water temperature will certainly climb up to that hot temperature. Spa controllers only heat, and they do not cool down the spa water. Cool air temperature or adding cool water to the spa will help the spa water to cool down. If you are still having problems with the spa water overheating, give tech support a call for further suggestions.