Generator runs but does not transfer load to the house during an outage.

Safety first: Do not attempt to manually force the transfer switch under load unless trained. Open all relevant breakers before working inside the ATS.

Steps:

• Verify generator output: Confirm the generator is producing correct voltage and frequency at its terminals.
• Check ATS status lights: Many Eaton ATS units have indicators for utility and generator presence. If utility is indicated when it is actually out, the sensing circuit may have failed.
• Control wiring: Inspect the low-voltage control cable between the generator controller and ATS for damage or loose terminals.
• Manual operation test: With both sources de-energized, operate the ATS manually (if designed for it) to ensure the mechanism moves freely. Binding or seized parts require ATS repair or replacement.
• Professional service: Because improper ATS operation can backfeed utility lines, have a qualified electrician or Eaton technician repair or replace the ATS components.