Can I fix Balboa code HFL myself?

Start with these safe checks: Top up the water to the fill line. Turn the spa off at its GFCI/breaker, take out the filter and clean it, then restart. Open all jets and valves, and prime the pumps if you just refilled. If HFL stays with a clean filter and full water, call for service.

When should I call a technician for code HFL?

If HFL stays with a clean filter and full water, 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 HFL / M016: Heater flow reduced

What HFL means

Heater flow is reduced: there may not be enough flow through the heater. Heater start-up tries again after about 1 minute.

Also shown as: M016, depending on the model.

Likely causes

Low water level
Dirty filter
Closed valves or too many closed jets
Air trapped after a refill

Safe first checks

Top up the water to the fill line.
Turn the spa off at its GFCI/breaker, take out the filter and clean it, then restart.
Open all jets and valves, and prime the pumps if you just refilled.

When to stop

If HFL stays with a clean filter and full water, 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.

Clarathon FC-2320 Spa Filter PRB14.5 C-2302$21.99

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.