Thermostat Q - Blower Does Not Turn ON in FAN Auto Mode
Asked Oct 18, 2006, 08:06 AM
I just installed a NOMA 7-day programmable thermostat for an electric furnace/AC system (ceiling unit). I believe the wiring (5-wire) is correct.
When I set it to COOL with Fan set to AUTO, it turns on the A/C and the fan automatically. Good.
But when I set it to HEAT with Fan set to AUTO, it turns on the heating system but the fan doesn't. The fan does turn on when I force it by setting the switch to ON.
Any idea why?