Furnace will not start at all, no lights on the control panel, completely dead.

Safety: Before working on electrical components, ensure the main breaker is off and verify with a tester.

• Check breaker: Locate the dedicated breaker for the Viadrus furnace in your electrical panel. Reset if tripped. If it trips again immediately, do not force it; call an electrician.
• Inspect main switch: Verify that the on/off switch on the furnace is in the ON position and not damaged.
• Terminal block: Remove the electrical cover on the furnace and check that the supply wires are firmly clamped in the terminal block. Tighten loose screws.
• Internal fuse: Many Viadrus control boards have a small glass or cartridge fuse. With power off, remove and inspect it. Replace only with the same rating. If it blows again, there is a short circuit that must be diagnosed by a technician.