Gecko · in.xe / in.ye / in.yt packsStop using the tub

OH on a Gecko hot tub: spa water overheat

The water in the spa has reached about 108°F. Do not get in. Take the cover off and let the water cool.

Also shown as: O H, overheat

Most likely causes

  1. 1Filter cycles too long in hot weathermost likely
  2. 2Hot weather with the cover oncommon
  3. 3Pump running continuouslyless common
  4. 4Temperature probe reading highless common

What to try, in order

  1. Stay out and remove the cover.
  2. Check the real temperature with a thermometer.
  3. Add some cold water if you want it to cool faster.
  4. Shorten the filter cycle duration or frequency in the panel settings.
  5. If OH appears when the water is not actually hot, book service.

OH questions

Why does my Gecko spa show OH on hot days?

Pumps add heat as they run. In summer, the filter cycles alone can push a well-insulated tub past its set point.

When is it safe to get back in?

When the water is at or below 104°F and the code has cleared.

Related codes

Balboa OH · Heater overheatHydro-Quip OH · Overheat protectionJacuzzi / Sundance OH · Overheat protectionGecko AOH · Equipment bay too hotGecko FLC · Flow switch stuck closedGecko FLO · No water flow detectedGecko HL · High limit trippedGecko Hr · Internal hardware error

General guidance. Follow your manufacturer's instructions; anything inside the control box is work for a licensed professional. Updated October 5, 2026.