DuroStar Transfer Switch Fails to Transfer

Generator fails to transfer load during an outage even though it is running.

Advertisements

Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Advertisements

Possible Causes

Stuck or welded ATS contacts, Failed ATS control coil, Incorrect wiring between generator and ATS, Mechanical obstruction in switch mechanism

How to Fix / Troubleshooting

Safety first: Lock out/tag out both utility and generator sources before opening the ATS. Only qualified electricians should service transfer switches.

  • Visual inspection: Check for burned contacts, melted insulation, or mechanical damage inside the ATS.
  • Test control coil: Verify that the ATS coil receives the proper voltage from the generator when a transfer is commanded. Replace the coil or contactor if it does not operate.
  • Check mechanical linkage: Ensure the moving contact assembly is not jammed by debris or misalignment.
  • Verify wiring: Compare all control and power connections to the DuroStar wiring diagram and correct any errors.
Advertisements

Repair Difficulty

Professional Required 5/5

Required Part

Automatic Transfer Switch Contactor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements