What does error code Sensor A fault mean on a Balboa hot tub?

Temperature sensor fault. A temperature sensor or its circuit has failed.

Can I fix Balboa code Sensor A fault myself?

Start with these safe checks: Note the message and turn the spa off. Balboa says call for service.

When should I call a technician for code Sensor A fault?

Balboa says call for service. 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 Sensor A fault / M031 / M032:…

What Sensor A fault means

A temperature sensor or its circuit has failed.

Also shown as: M031, M032, Sensor B fault, depending on the model.

Likely causes

Sensor or wiring fault

Safe first checks

Note the message and turn the spa off.

When to stop

Balboa says call for service.

Parts that may help

Only order a part once the checks above point to it, and match the part number to your model.

Sundance/Jacuzzi 3-Pin Temperature Sensor, 12 ft Cable – 6600-751$59.99

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.