Furnace will not start at all; display is blank or dark, no fan or pump operation.

Safety: Turn off the breaker before opening any electrical compartment.

• Check breaker and switch: Verify the furnace circuit breaker is ON and any local disconnect switch near the Termet furnace is ON.
• Inspect power cord/terminal: Open the electrical access panel and confirm that live, neutral, and earth are securely connected.
• Check internal fuse: Many Termet boards have a replaceable fuse. With power off, remove and visually inspect the fuse. Replace only with the same type and rating.
• Test outlet (if plug-in): Plug another device into the same outlet to confirm power is present.

If the furnace remains dead after these checks, the main control board or internal power supply is likely faulty and should be replaced by a professional.