Generator runs but trips its main breaker or shuts down when large motors (like well pumps or AC compressors) start.

Safety first: Open the transfer switch to isolate the generator. Do not repeatedly reset a tripping breaker without finding the cause.

• Identify offending load: Note which appliance starts just before the trip. Common culprits are air conditioners, well pumps, and air compressors.
• Check generator rating: Compare the WEN generator's kW rating to the starting kVA of the load. If the load is too large, consider installing a soft‑start kit on the appliance or upgrading the generator.
• Inspect main breaker: Check the generator main breaker for signs of overheating or wear. Replace the main circuit breaker if it trips at currents below its rating.
• Stagger loads: Configure the ATS or load management system (if available) to delay starting large loads until the generator is stable.
• Have motors tested: If a specific motor draws excessive current, have an electrician or HVAC technician test and repair or replace the motor.