White-Rodgers 1F56N-444 Thermostat User Manual

Quick guide from the manual

This document provides installation and operation instructions for the White-Rodgers 1F56N-444 thermostat. Before starting, ensure you have the necessary tools: power drill, flat blade screwdriver, wire cutter/stripper, and a level. Important: Always disconnect electrical power at the main fuse or circuit breaker before beginning installation to prevent shock or equipment damage.

Removing the old thermostat

A standard heat/cool thermostat consists of three basic parts:

• Cover: May be snap-on or hinge type.
• Base: Removed by loosening all captive screws.
• Switching subbase: Removed by unscrewing the mounting screws holding it to the wall or adaptor plate.

Note the anticipator setting on the old thermostat for future reference.

Mounting and wiring

Follow these steps to mount the new thermostat:

• Mounting: Use the screws provided to mount the subbase or wallplate to the wall. Ensure the area is clear of wires.
• Wiring: Attach wires to the appropriate terminals. Use the terminal cross-reference chart provided in the manual to determine correct connections.
• Jumper settings: If your system has more than two wires, check the factory-installed jumper between RH and RC. For electric heat or single-stage heat pump systems that require the thermostat to energize the fan, move the yellow jumper wire from the Y terminal to the A terminal.
• Finishing: Gently push excess wire back into the wall opening and plug the hole with fire-resistant material (e.g., fiberglass insulation) to prevent drafts. Mount the thermostat base to the subbase using the three captive screws.

Setting the heat anticipator

The heat anticipator is adjustable from 0.15 to 1.2 Amps. To adjust:

1. Rotate the contact arm to match the current rating stamped on your main heating control.
2. Move the pointer counterclockwise to lengthen heating cycles or clockwise to shorten heating cycles.
3. Adjustments should not be greater than 1/2 marking at a time.

Operation

Once power is restored, use the system switch to select heating or cooling. Use the fan switch to control fan operation:

• AUTO: Fan runs with the heating or cooling system.
• ON: Fan runs continuously, regardless of the system switch position.

Troubleshooting

If you encounter issues, check the following:

• No Heat/No Cool/No Fan: Check for a blown fuse or tripped circuit breaker, ensure the furnace power switch is ON, and verify the furnace blower compartment door is properly installed.
• Furnace cycles too fast/slow: Adjust the heat anticipator setting.
• Thermostat thermometer disagrees with room temp: Use a standard slotted screwdriver to turn the thermometer pointer screw inside the front cover to calibrate.