Emerson thermostat troubleshooting

Emerson 1F83-0422 thermostat troubleshooting

SymptomPossible CauseCorrection 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.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.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan system.
4. FAN Switch set to Fan ON.
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 cycle in the Configuration menu, step 6 (heat). 7 (cool) or 8 (heat pump). If an acceptable cycle rate is not achieved, contact a local HVAC service person for additional suggestions.
Forgot Keypad Lockout CodeHold MENU key for 20 seconds and the lockout will reset.

Emerson Delwarva Power thermostat troubleshooting

Possible CauseCorrective Action
Blown fuse or tripped circuit breaker.Replace fuse or reset breaker.
Furnace power switch set to OFF.Turn switch to ON.
Furnace blower compartment door or panel is loose or not properly installed.Replace door panel in proper position to engage safety interlock or door switch.
Thermostat may be in an Energy Wise Rewards conservation period. "Event in Progress" will be displayed on top line of home screen.Wait for the Energy Wise Rewards conservation period to end.
System switch is set to OFF.Press the thermostat's SYSTEM button one or more times to select HEAT or COOL (as appropriate).
Fan set to ON.Change Fan to AUTO.
Thermostat thermometer setting requires adjustment.The thermometer can be adjusted +/- 5 degrees. See Adjust Temperature Display on page 9.
Pilot light not lit.If it will not stay lit, call for service from your HVAC contractor.
System switch not set to HEAT.Press the thermostat's SYSTEM button one or more times to select HEAT and press © to raise the temperature setpoint above room temperature.
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 your HVAC contractor for assistance.
Heating system requires service or thermostat requires replacement.To diagnose this condition: Press SYSTEM button to select HEAT and press © to raise the temperature 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 after being reset, contact Delmarva Power Energy Wise Rewards for a replacement thermostat. If the thermostat does click, contact the furnace manufacturer or your HVAC contractor for a service visit to verify the heating is operating correctly.
The location of the thermostat and/or the size of the heating system may be influencing the cycle rate.Electronic thermostats, like this one, normally provide precise temperature control and may cycle faster than some older mechanical models. A faster cycle rate means the unit turns on and off more frequently to maintain the desired temperature, but runs for a shorter time so there is no increase in overall energy use.
System switch not set to COOL.Press SYSTEM button to select COOL and press 0 to lower the temperature setpoint below room temperature.
Outdoor unit disconnect or breaker tripped.Verify the outdoor unit disconnect or breaker has not been tripped.
Cooling system requires service or thermostat requires replacement.To diagnose this condition: Press SYSTEM button to select COOL and press 0 to lower the temperature setpoint below 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 after being reset, contact your installing contractor for a replacement thermostat. If the thermostat clicks, contact the furnace manufacturer or HVAC contractor for a sen/ice visit to verify the cooling is operating correctly.
Your thermostat is designed to determine the optimum time to activate the second stage. Simply raising the temperature in heating or lowering it in cooling will not always force the thermostat to bring the second stage on quickly. There is a time delay of 0 to 30 minutes depending on the performance of the first stage of the system.Wait for the second, third, or fourth stage to come on.

Error codes and troubleshooting