Zodiac pool heater makes loud banging or popping noises during operation.

Safety: Loud bangs can indicate dangerous delayed ignition. Turn off power and gas immediately and do not continue to operate the heater until inspected.

• Inspect burners: Remove the burner access panel and burner tray. Clean burners and orifices of rust, scale, and debris using a soft brush and compressed air.
• Check for soot: Look for black soot on the heat exchanger or inside the cabinet, indicating poor combustion. If present, stop and call a professional.
• Verify air openings: Ensure combustion air inlets are not blocked by leaves, dirt, or stored items.
• Professional combustion check: Have a qualified technician verify gas pressure, adjust combustion if applicable, and inspect the heat exchanger for damage.