Generator runs but produces no AC power at the output lugs; controller shows normal run status with no code.

Safety first: Isolate the generator from the building and utility by opening the transfer switch. Turn OFF the generator and disconnect the battery before opening the alternator housing.

• Verify zero voltage: With the generator running in manual mode and no load, measure voltage at the output lugs. If zero or very low, shut down and proceed.
• Inspect alternator connections: Remove the alternator end cover and check all stator and rotor connections at the terminal block and AVR. Tighten any loose screws.
• Check brushes and slip rings: If your WEN alternator uses brushes, remove and inspect them. Replace the brush set if worn. Clean slip rings with fine abrasive.
• Test AVR: Inspect the AVR for burnt components or odor. If available, substitute a known good AVR to see if voltage returns.
• Field flashing (advanced): In some cases, the alternator may lose residual magnetism. A brief field flash using a low‑voltage DC source can restore it, but this should be performed only by a qualified technician following WEN procedures.