Honeywell T8665A Owner's Manual - Page 42

Troubleshooting (Cont) Symptom Cooling does not come on. Possible Cause System selection is not set to Cool. Cooling setpoint is above room temperature. System on indicator- for heat, for cool- is lit, but no warm or cool air is coming from the registers. Heat or cool turns on before programmed time. Heating/cooling equipment turns on the fan when the equipment has reached the preset time or temperature. Adaptive Intelligent Recovery™ control is on. Action Check that setpoint is below room temperature. Check if the circuit breaker is tripped-reset the circuit breaker. Check if the fuse at the fuse box is blown-replace the fuse. Check if the System switch at the equipment is in the Off position-set to the On position. Wait five minutes for the system to respond (thermostat displays " Wait"). Set System selection to Cool. Wait a minute after seeing the or and then check the registers. If there is no hot or cool air coming from registers, refer to Heating does not come on or Cooling does not come on. Adaptive Intelligent Recovery™ control brings the heat or cool on early to meet the temperature set for the programmed period. See Adaptive Intelligent Recovery™ control section. To disable Adaptive Intelligent Recovery™ control, contact your local Heating and Air Conditioning contractor. 42 69-1536-3