The furnace will not start at all; no fan, no inducer, and no lights on the control board.

Safety first: Use a non-contact voltage tester and turn OFF the breaker before opening any electrical boxes.

• Check breaker and switch: Confirm the furnace breaker is ON and the service switch near the furnace is in the ON position.
• Door switch: Ensure the blower door is fully closed and engaging the door switch. Some Kelvinator furnaces will be completely dead if the door is not properly seated.
• Inspect junction box: With power OFF, open the furnace junction box and check for loose wire nuts or burned connections. Tighten as needed.
• If still dead: If there is confirmed 120 VAC to the furnace but the control board LED is off, the board or internal fuse may have failed and should be checked by a technician.