The White Rodgers 1D56-310 is a manual thermostat for heating/cooling and cooling-only applications. It features positive contact snap-switches on subbase, bimetal thermometer, clear removable faceplate, and heating/cooling anticipators for narrow differential control. Compatible with standard 24V HVAC systems including gas, oil, electric, and hydronic. Below are the key specifications, installation, and operation instructions.
Assemble tools required: screwdriver, wire cutter/stripper.
WARNING: Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage.
ATTENTION: This product does not contain mercury. However, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. Mercury must not be discarded in household trash. Refer to www.white-rodgers.com for location to send product containing mercury.
Related Models: 1F56-301, 1F56-444, 1E56-444, 1D30-316, 1C30-302, 1F58-058
A standard heat/cool thermostat consists of three basic parts:
Make a note here of the anticipator setting on the old thermostat for future reference and use in step 5.
The heat anticipator pointer, if adjustable, will be set at one of a series of numbers representing the current rating of the primary control in your furnace. The number will be one of the following: .2, .4, .8, etc. or 0.2, 0.4, 0.8, etc.
If no heat anticipator/indication is showing, do not be concerned; move on to the next step.
Systems Replaced:
| New Thermostat Terminal Designation | Other Manufacturers’ Terminal Designation |
|---|---|
| RH | 4, R |
| RC | G |
| G | W |
| W | Y |
| Y | RH, R, G, W, Y, M, V, F, H, C, R5, -, G, 4, Y6, R, - |
* These are four-wire, single-transformer systems. Factory installed jumper wire between the RH and RC terminals must remain in place.
Refer to the note made during removal of the old thermostat. Set the heat anticipator pointer to match the primary control rating (e.g., .2, .4, .8). This adjustment affects the heating cycle rate.
1. System Switch: Set to HEAT for heating, COOL for cooling, OFF to turn off.
2. Fan Switch: AUTO for automatic fan operation, ON for continuous fan.
3. Temperature Adjustment: Slide the lever to desired temperature.
4. Electric Heat Note: If fan control is needed for heat, ensure jumper is set as described in wiring.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No Heat/No Cool/No Fan (common problems) | 1. Blown fuse or tripped circuit breaker. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel loose or not properly installed. | 1. Replace fuse or reset breaker. 2. Turn switch to ON. 3. Replace door panel in proper position to engage safety interlock or door switch. |
| No Heat | 1. Pilot light not lit. 2. Broken or melted anticipator wire. 3. Loose connection to thermostat or system. 4. Thermostat or heating system requires replacement or service. 5. System Switch not set to Heat. 1. Furnace Lock-Out Condition | 1. Re-light pilot. 2. Excessive current or dead short in system. Have a qualified service person check the system before replacing thermostat. 3. Verify thermostat and system wires are securely attached. 4. Your furnace manufacturer or service person can describe how to test the heating system to verify it is operating correctly. If the heating system is capable of operation and the no heat condition persists, replace the thermostat. 5. Set System Switch to Heat and raise temp above room temp. Many furnaces have safety devices that shut the system down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local service person for assistance. |
| Intermittent Heat | ||
| No Cool | 1. Loose connection to thermostat or system. 2. Thermostat or cooling system requires replacement or service. 3. System Switch not set to Cool. | 1. Verify thermostat and system wires are securely attached. 2. Your cooling system manufacturer or service person can describe how to test the cooling system to verify it is operating correctly. If the cooling system is capable of operation and the no cooling condition persists, replace the thermostat. 3. Set System Switch to Cool and lower temp below room temp. |
| Heat, Cool or Fan Runs Constantly | 1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. | Check each wire connection to the thermostat to verify it is neatly looped under the terminals. No extra wire should stick out from under the terminals. |
| Furnace Cycles Too Fast or Too Slow (Narrow or wide temperature swing) | See Step 5, Adjusting the Anticipator. The anticipation setting is the only adjustment that effects the heating cycle rate. If an acceptable cycle rate is not achieved using the anticipator contact a local service person for additional suggestions. The location of the thermostat, size of the Heat/Cool System and current draw can influence the cycle rate. | |
| Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing) | 1. Poor thermostat location for sensing room temperature. 2. Cooling system over or undersized. 3. Excessive Current draw influencing thermostat. | The cycle rate for cooling can not be adjusted. The location of the thermostat, size of the Cool system and current draw can influence the cycle rate. Contact a local service person for suggestions. |
| Thermostat Setting and Thermostat Thermometer Disagree | 1. Thermostat thermometer setting requires adjustment. 2. Thermostat setting lever requires calibration. | The thermometer can be adjusted by using a standard slotted screwdriver. Turn the thermometer pointer screw located inside the front cover to change the setting. For calibrating the setting lever contact a local heating and cooling service person. |
1. Thermostat thermometer disagrees with other room thermometers.
The thermometer on the thermostat is accurately calibrated at our factory but you can adjust it by using a standard slotted screwdriver. Turn the thermometer pointer screw located inside the front cover to change the setting.
Homeowner Help Line: 1-800-284-2925