Can I fix Jandy code 3 flashes myself?

Start with these safe checks: Make sure the gas supply is on, then reset the heater once by turning it off and on. If it locks out again, call a qualified tech.

When should I call a technician for code 3 flashes?

If it locks out again, call a qualified tech. Smell gas? Leave right away, don't touch light switches or phones inside, and call your gas utility or 911 from outside. Never open a gas valve, burner, gas line, vent or flue connection, or bypass a safety switch. Repeated lockouts, scorching, soot, or a CO alarm mean shut it off and call a licensed gas technician.

Jandy Pool Heater Error Code 3 flashes / LED 3 flashes: Ignition…

What 3 flashes means

Three flashes on the ignition control LED mean ignition lockout after 3 failed tries (a soft lockout).

Also shown as: LED 3 flashes, depending on the model.

Likely causes

Gas supply off
Igniter or flame sensing fault

Safe first checks

Make sure the gas supply is on, then reset the heater once by turning it off and on.

When to stop

If it locks out again, call a qualified tech.

Checked against: Jandy JXi gas-fired pool and spa heater installation and operation manual (H0574300). Codes can differ by model and year, so confirm with your owner's manual.