My furnace does not start and the cold weather is coming in. When the thermostat is set for heat to come on, the furnace hums, but the blower does not start. The squirrel cage can be rotated easily by hand. Error code show one long, one short, pause, endless blinking about a second apart.
The unit was installed in 1994 and has never had service or anything go wrong in all the years of faithful service.
Any help would be greatly appreciated, and thank you in advance.