What does the code OH mean on a hot tub?

OH : Overheat. Spa temp over 108°. HLoH : Hi Limit Over Heat. Hi limit sensor is disconnected, shorted, or spa temp is above 112° F. SEoP : Sensor open or disconnected. Heater disabled but spa operational. SESH : Sensor short, nonfunctional. Heater disabled but spa operational.

Are there error codes for digital hot tubs?

The best thing about digital spas and hot tubs – those with a spa side control panel – is that you are given error codes for most equipment problems. Spa error codes can be somewhat cryptic, but when you have the BIG LIST of CODES, you can immediately define the two or three digit source of trouble.

What to do if your spa error code is Oh?

Here’s another Cal Spa troubleshooting flowchart for spa error codes OH, including testing the spa heater element for excessive resistance. This type of testing should only be done with the spa heater and all systems powered OFF, and only performed by someone who is qualified to test safely.

What does oh, ohh, OHS mean in Spa?

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. Open the spa cover to allow excess heat and steam to escape.

Why does my hot tub have an OH code?

It is almost always a flow problem. When it’s not a flow problem, it’s usually a bad temp sensor, high limit switch or a stuck relay. Here’s another Cal Spa troubleshooting flowchart for spa error codes OH, including testing the spa heater element for excessive resistance.