Your new White Rodgers 1E56-444 Thermostat is a vertical snap-action thermostat for standard heating and cooling systems. It features heating and cooling anticipators, B&O terminals for compressor lockout protection, and compatibility with electric heat and single-stage heat pumps. Below are the key specifications, installation, operation, and troubleshooting instructions.
Assemble tools required: power drill, flat blade screwdriver, wire cutter/stripper, level.
Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage.
CAUTION! To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete.
Before removing wires from old thermostat’s switching subbase, label each wire with the terminal designation it was removed from.
WARNING! Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard. Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage. Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
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. If a cell becomes damaged, the unit should be discarded. Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container. Refer to www.white-rodgers.com for location to send product containing mercury.
Buttons/Switches: FAN (AUTO, ON), SYSTEM (COOL, OFF, HEAT). Terminals: G, RC, B, O, W, A, Y, RH.
Figure 1. Thermostat subbase and wallplate: Mounting Screw, KEEP THIS AREA CLEAR OF WIRES Hole, Mounting Screw in Wall.
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.
Remove base from subbase: Loosen the screws on the base and remove it from the wall. Do not remove wires at this time.
Mount switching subbase: Use the screws provided to mount the subbase and adaptor plate (optional) to wall.
Terminal Cross Reference Chart
| New Thermostat Terminal Designation | Other Manufacturers' Terminal Designation |
|---|---|
| RH | RH, M, R |
| RC | R, V |
| G | G, F |
| W | W, H |
| Y | Y, C |
* These are four-wire, single-transformer systems. Factory installed jumper wire between the RH and RC terminals must remain in place.
Figure 2. Typical wiring for a single transformer heating/cooling system
For four-wire heat/cool system, leave the factory installed jumper between RC and RH attached.
Figure 3. Typical wiring for a two-transformer heating/cooling system
For five-wire system, remove the factory installed jumper between RC and RH.
Figure 4. Typical wiring for single transformer, single-stage heat pump system
For two wire systems (Heat Only or Cool Only): If you have a two-wire Heat Only system, attach one wire to RH and one to W. If you have a two-wire Cool Only system, attach one wire to RC and one to Y. Leave the factory installed jumper between RC and RH attached. Tighten any unused terminals securely.
Figure 5. Typical wiring diagram for heat only, 2-wire
Figure 6. Typical wiring diagram for cool only, 2-wire
Electric heat or single stage heat pump systems: 1E56-444 energizes the fan on call for heat. Other thermostats are configured from the factory to operate a heat/cool, fossil fuel (gas, oil, hot water) forced air system. This is correct for any system that DOES NOT require the thermostat to energize the fan on a call for heat. If your system is an electric heat or heat-pump system that REQUIRES the thermostat to turn on the fan on a call for heat, remove the yellow factory-installed jumper wire from the Y terminal and connect it to the A terminal. This will allow the thermostat to energize the fan immediately on a call for heat. If you are unsure if the heating system requires the thermostat to control the fan, contact a qualified heating and air conditioning service person. For single stage heat pump applications (no auxiliary heat), install a short jumper wire (not included) across terminals W and Y. If the system has a reversing valve connection energized in Cooling, attach it to O. If the system has a reversing valve connection energized in Heating, attach it to B. This thermostat will not provide multi-stage heating or cooling.
CAUTION! To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete. Keep this area clear of wires.
Set anticipator to match the setting of your old thermostat you noted in Step 3, or, the anticipator should be set to match the current rating stamped on your main heating control. The heat anticipator is adjustable from 0.15 to 1.2 amps. Adjust the anticipator by rotating the contact arm. The anticipator setting is indicated by the numbers on the base that the pointer points to. If you are unsure where to set the anticipator contact the heater manufacturer for a recommended setting. Move the pointer counterclockwise to lengthen heating system cycles; move clockwise to shorten heating cycles. Adjustments should not be greater than 1/2 marking at a time.
Figure 7. Heat anticipator adjustment
Snap on Cover: Carefully align the cover with the base and snap the cover onto the base.
Contact service if not operating properly. After installation, perform the following checks:
Use the fan switch to control fan operation. When the fan switch is in the AUTO position, the fan will cycle with the heating or cooling system (the fan will not run if the system switch is in the OFF position and the fan switch is in the AUTO position). When the fan switch is in the ON position, the fan will run continuously, regardless of system switch position (even if the system switch is set to OFF, the fan will run if the fan switch is in the ON position).
Use the system switch to select either heating. Set System Switch to Heat and raise temp above room temp.
CAUTION: Below 50°F, DO NOT operate.
Use the system switch to select cooling. Set System Switch to Cool and lower temp below room temp.
| System | Models |
|---|---|
| Standard Heating & Cooling Systems – 4 or 5 wires Standard Heat Only Systems Standard Central Air Conditioning Gas or Oil Heat Hydronic (Hot Water) Zone Heat – 2 wires | All Models |
| Electric Furnace Heat Pump (No Aux or Emergency Heat) | 1E56-444, 1E56W-444, 1F56-306, -444, 1F56W-444 |
| Heat Pump (with Aux or Emergency Heat) Baseboard Electric Heating or Line Voltage (120 or 240 Volt) Millivolt Heat Only Systems – Floor or Wall Furnaces Hydronic (Hot Water) Zone Heat – 3 wires | None |
| 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. | Replace fuse or reset breaker. Turn switch to ON. 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. Furnace power switch to OFF. 4. Furnace blower compartment door or panel loose or not properly installed. 5. Heating system requires service or thermostat may be improperly wired. | Re-light pilot. Excessive current or dead short in system. Have a qualified service person check the system before replacing thermostat. Turn switch to ON. Replace door panel in proper position to engage safety interlock or door switch. Verify thermostat and system wires are securely attached. |
| No Cool | 1. Cooling system requires service or thermostat may be improperly wired. 2. Furnace power switch to OFF. 3. Furnace blower compartment door or panel loose or not properly installed. | 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. Turn switch to ON. Replace door panel in proper position to engage safety interlock or door switch. |
| Heat, No Cool | 1. Cooling system requires service or thermostat may be improperly wired. 2. System switch set to HEAT. | 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. Set System Switch to Cool and lower temp below room temp. |
| Cool, No Heat | 1. Heating system requires service or thermostat may be improperly wired. 2. System switch set to COOL. | 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. Set System Switch to Heat and raise temp above room temp. |
| Furnace Blower Does Not Shut Off | 1. System switch set to FAN ON. 2. Heating system requires service or thermostat may be improperly wired. | Set System Switch to AUTO or OFF. 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. |
| Heat Pump Malfunctions | 1. Heat pump requires service or thermostat may be improperly wired. 2. Reversing valve wired incorrectly (check O or B terminal). | Contact a qualified service person for assistance. Verify wiring to O or B terminal. |
Homeowner Help Line: 1-800-284-2925 www.white-rodgers.com