White Rodgers Air Conditioner troubleshooting

The diversity of models distinguishes White Rodgers air conditioners. There are models to any taste and needs. The entire range of air conditioners of this make has an efficient system of troubleshooting, revealing errors and malfunctions with their subsequent decoding. It is presented below in form of a chart.

SymptomPossible CauseCorrective Action
No Heat/No Cool/No Fan (common problems)1. Blown fuse or tripped circuit breaker.Replace fuse or reset breaker.
2. Furnace power switch to OFF.Turn switch to ON.
3. Furnace blower compartment door or panel loose or not properly installed.Replace door panel in proper position to engage safety interlock or door switch.
4. Loose connection to thermostat or system.Tighten connections.
No Heat1. Pilot light not lit.Re-light pilot.
2. Furnace Lock-Out Condition. Heat may also be intermittent.Many furnaces have safety devices that shut down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local HVAC service person for assistance.
3. Heating system requires service or thermostat requires replacement.Diagnostic: Set SYSTEM Switch to HEAT and raise the setpoint above room temperature. Within a few seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a HVAC service person to verify the heating is operating correctly.
No Cool1. Cooling system requires service or thermostat requires replacement.Same as diagnostic for No Heat condition except set the thermostat to COOL and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling.
Heat, Cool or Fan Runs Constantly1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. FAN Switch set to Fan ON.
Check each wire connection to verify they are not shorted or touching together. No bare wire should stick out from under terminal block. Try resetting the thermostat as described above. If the condition persists the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat.
Thermostat Setting & Thermostat Thermometer Disagree1. Thermostat thermometer setting requires adjustment.The thermometer can be adjusted +/- 4 degrees. See Temperature Display Adjustment in the Configuration Menu section.
Furnace (Air Conditioner) Cycles Too Fast or Too Slow (narrow or wide temperature swing)1. The location of the thermostat and/or the size of the Heating System may be influencing the cycle rate.Digital thermostats provide precise control and cycle faster than older mechanical models. The system turns on and off more frequently but runs for a shorter time so there is no increase in energy use. If you would like an increased cycle time, choose SL for slow cyde in the Configuration menu, step 6 (heat) or 7 (cool). If an acceptable cycle rate is not achieved, contact a local HVAC service person for additional suggestions.
Forgot Keypad Lockout CodePress the menu button (button will disappear) and hold in for 20 seconds. This unlocks the thermostat.