7 TROUBLESHOOTING
CONTINUED FROM FIFTH PAGE |
|
|
|
|
|
Symptom |
| Possible Cause |
| Corrective Action | |
|
| ||||
|
|
|
|
|
|
No Heat |
| 1. | Pilot light not lit. |
| |
|
| 2. | System Switch not set to HEAT. |
| Set System Switch to HEAT and raise setpoint |
|
|
|
|
| above room temperature. |
|
| 3. | Loose connection to thermostat or system. |
| Verify thermostat and system wires are securely |
|
|
|
|
| attached. |
|
| 4. | Furnace |
| Many furnaces have safety devices that shut |
|
|
| be intermittent. |
| down when a |
|
|
|
|
| heat works intermittently contact the furnace |
|
|
|
|
| manufacturer or local service person for |
|
|
|
|
| assistance. |
|
| 5. | Heating system requires service or |
| Diagnostic: Set System Switch to HEAT and raise |
|
|
| thermostat requires replacement. |
| the setpoint above room temperature. Within a few |
|
|
|
|
| seconds the thermostat should make a soft click |
|
|
|
|
| sound. This sound usually indicates the thermo- |
|
|
|
|
| stat 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 |
|
|
|
|
| service person to verify the heating is operating |
|
|
|
|
| correctly. |
|
|
|
|
|
|
No Cool |
| 1. | System Switch not set to COOL. |
| Set System Switch to COOL and lower setpoint |
|
|
|
|
| below room temperature. |
|
| 2. | Loose connection to thermostat or system. |
| Verify thermostat and system wires are securely |
|
|
|
|
| attached. |
|
| 3. | Cooling system requires service or |
| Same procedure as diagnostic for No Heat |
|
|
| thermostat requires replacement. |
| 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 Constantly. |
| 1. | Possible short in wiring. |
| Check each wire connection to verify they are not |
|
| 2. | Possible short in thermostat. |
| shorted or touching together. No bare wire should |
|
| 3. | Possible short in heat/cool/fan system. |
| stick out from under terminal screws. Try resetting |
|
| 4. | Fan Switch set to Fan On. |
| 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. |
|
|
|
|
|
|
Furnace (Air Conditioning) Cycles Too Fast |
| 1. | The location of the thermostat and/or the |
| Digital thermostats normally provide precise |
or Too Slow (narrow or wide temperature |
|
| size of the Heating (Cooling) System may |
| temperature control and may cycle faster than |
swing) |
|
| be influencing the cycle rate. |
| some older mechanical models. A faster cycle |
|
|
|
|
| rate means the unit turns on and off more |
|
|
|
|
| frequently but runs for a shorter time so there is |
|
|
|
|
| no increase in energy use. If you would like to |
|
|
|
|
| increase the cycle time, clip Jumper |
|
|
|
|
| mentioned in the instructions for Hydronic Heating |
|
|
|
|
| Systems. It is not possible to shorten the cycle |
|
|
|
|
| time. If an acceptable cycle rate is not achieved as |
|
|
|
|
| received or by clipping |
|
|
|
|
| service person for additional suggestions. |
|
|
|
|
|
|
Thermostat Setting and Thermostat |
| 1. | Thermostat thermometer setting requires |
| The thermometer can be adjusted +/- 3 degrees. |
Thermometer Disagree |
|
| adjustment. |
| See Temperature Display Adjustment in the |
|
|
|
|
| Operation section. |
|
|
|
|
|
|
Blank Display and/or Keypad Not |
| 1. | Voltage spike or static discharge. |
| Use the Reset Operation listed above. |
Responding |
|
|
|
|
|
|
|
|
|
|
|