Honeywell T8501 Owner's Manual - Page 6

TROUBLESHOOTING GUIDE Symptom Heating or Cooling does not come on. Temperature setting is too wram or cool. System on indicator ( = heat, = cool) is lit, but no warm or cool air is coming from the registers. Action Check that the System key on the thermostat is set to Heat or Cool. Check if the circuit breaker is tripped-reset the circuit breaker. Check if the fuse is blown-replace the fuse. Check for air movement at the register. Check power to the heating or cooling equipment. Adjust the temperature by pressing either the ▲ or ▼ key. Wait five minutes after seeing the flame or snowflake and check the registers again. If no there is no hot or cool air coming from the registers, refer to Heating or Cooling does not come on. If all these actions were checked, contact your local heating and cooling contractor. 6 69-1629-1