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Balboa hot tub error code

Balboa hot tub code dry / M027 / Heater dry: Heater dry, spa shut down

Balboa spa controls

What dry means

There's not enough water in the heater to start it. The spa stays shut down until the problem is fixed and you press a button.

Also shown as: M027, Heater dry, depending on the model.

Likely causes

  • Low water
  • Airlock
  • Severe flow restriction

Safe first checks

  1. Fix the water level and airlock, then press any button to reset.

When to stop

If it repeats, call for service.

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