Can I fix Balboa code OHH myself?

Start with these safe checks: Stay out of the water. Let it cool below 108°F, then press a button to reset. Clean the filter and check flow (power off first). If OHH repeats, call for service. Don't soak until it's resolved.

When should I call a technician for code OHH?

If OHH repeats, call for service. Don't soak until it's resolved. Water and electricity together can kill. Turn the equipment off at the breaker before you open anything, never touch equipment while standing in water, and stay out of the pool or spa if you feel tingling or suspect an electrical problem. Leave wiring, boards and GFCI faults to a licensed electrician or service tech.

Balboa Hot Tub Error Code OHH / M030: Heater too hot

What OHH means

A sensor detected 118°F in the heater and the spa shut down. Reset when the water is below 108°F.

Also shown as: M030, depending on the model.

Likely causes

Poor flow through the heater
Dirty filter
Closed valves

Safe first checks

Stay out of the water. Let it cool below 108°F, then press a button to reset.
Clean the filter and check flow (power off first).

When to stop

If OHH repeats, call for service. Don't soak until it's resolved.

Checked against: Balboa TP500S / TP600 system user guide (42339 rev A1): message codes; Balboa Spa Touch 3 user guide: messages. Codes can differ by model and year, so confirm with your owner's manual.