Controller displays LO FUEL or LOW FUEL (LP tank models) and generator will not run a full cycle.

Safety first: Turn the controller to OFF. Do not smoke or create sparks near fuel.

• Check tank level: Read the LP tank gauge. If below the manufacturer-recommended minimum (often 20–30%), schedule a refill.
• Inspect regulator: Examine the primary and secondary LP regulators for frost buildup or damage. Ensure vent openings are clear.
• Level sender and wiring: On systems with a wired tank level sender, inspect the sender and cable for damage. Replace the sender if readings are obviously incorrect.
• Gas piping: Have a gas technician verify that the supply line size and pressure meet Briggs & Stratton specifications during generator operation.
• Clear the code: After restoring adequate fuel and correcting issues, cycle the controller to OFF then AUTO and run a full exercise cycle.