Controller or external sensor indicates FUEL LEAK or FUEL ALARM; fuel odor may be present near generator.

Safety first: Immediately place the controller in OFF, close the gas shutoff valve, and keep all flames and sparks away. Evacuate the area if gas odor is strong and contact the gas supplier or fire department if necessary.

• Visual inspection: Once safe, inspect all visible fuel connections, hoses, and the Guardian regulator for signs of leakage (frosting, hissing, or odor).
• Soap solution test: Apply a soap-and-water solution to fittings and watch for bubbles indicating leaks. Do not use open flame.
• Tighten or replace components: Carefully tighten loose fittings. Replace cracked hoses or a leaking regulator with Guardian-approved parts.
• Sensor check: If no leak is found, inspect the external fuel leak sensor wiring and sensor body for damage or contamination.
• Professional verification: Have a licensed gas technician pressure-test the system before returning the generator to service.