Old Honeywell Thermostat Wiring Diagram

Use the wiring cross reference table below to match each old thermostat wire with its corresponding terminal on the ct87 wallplate or subbase.

Old honeywell thermostat wiring diagram. Green the green wire connects to the fan. The honeywell home trademark is used under license from honeywell international inc. The model number of the honeywell thermostat was not provided however here are the typical wiring assignments for a conventional heating system. Install the honeywell lyric thermostat like a pro.

It s used for systems that don t provide a c wire but have a thermostat that requires one. 4 wire honeywell thermostat wiring diagram a pcb layout is the resulting design from taking a schematic once specific components and determining how they will physically be laid out upon a. White the white wire is what connects to the auxiliary heat on your system. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 2 wire application controlling a gas fired heating appliance.

The table above provides a more complete list of honeywell thermostat wiring colors and their uses. Wiring details troubleshooting for the honeywell 5 2 day programmable thermostat rth2300b1012. Honeywell thermostat rthb wiring diagram. But here is a list of the most common wire color mappings as seen in many four wire t stat setups.

Our wiring diagrams section details a selection of key wiring diagrams focused around typical sundial s and y plans. Honeywell thermostat wiring diagram 4 wire examples. Orange this wire connects to your heat pump if you have one. Our page top sketch courtesy of honeywell controls illustrates the wiring diagram for a traditional honeywell t87f thermostat used for 2 wire single pole single i am trying to wire an rth series honeywell thermostat and i followed what i believe is the correct wiring diagram but nothing is kicking on.

Red now there can be two separate wires for this. Honeywell thermostat wiring diagram wires. Honeywell wire saver modules combine the y and g wires to form a single k wire that connects to the k terminal on some honeywell thermostats. 8 through 13 wiring diagrams.

Also see these other honeywellt87 wall thermostat wiring diagrams honeywell wall t87 f type thermostats for sketches and drawings of honeywell thermostat wiring hookups. Strip the wire insulation as needed to fit the wires underneath the ter minal screws. C 24 vac common you might see blue purple or brown typically used for this wire. Yellow the yellow wire connects to your compressor.

These wires run directly outside and provide outdoor temperature information to the thermostat. Keep in mind that there should be a low voltage cable in the wall where the thermostat is located which has individual wires as shown in the instructions below.