What does oh ohh OHS mean in a hot tub?
What does oh ohh OHS mean in a hot tub? OH, OHH or OHS (o verheat) all mean that a temperature sensor has detected unsafe water temperatures of 108° - 118° F, and your spa is in an emergency cool down mode. The heater is shut off, and the circulation pumps and blower are turned on to help dissipate heat. Why is my hot tub flashing an Ohh code? So first off it hasn't ran in about a year. The water in the tub is stone cold maybe 40 some degrees. When you power on the breaker the tub goes...