4 Wire Thermostat Wiring Color Code Uk

Home forums how to.

4 wire thermostat wiring color code uk. Example of a honeywell smart thermostat rth9580wf wall plate mounted with 4 wires connected. 1 being red 2 yellow 3 yellowgreen4 blue. Wall plate for a 4 wire smart thermostat installation. This could happen if the wires are swapped on both.

Discussion in electrics uk started by. Electrics uk central heating room thermostat wiring help. Heck now im not calling anyone a dummy. For all other t stat terminals and in fact sometimes even for the above mentioned common color assignments the exact purpose of a wire is often not clear.

The thermostat wiring color code guide. 4 wire thermostat wiring color code. The next t stat the honeywell t87n1026 big dial model does not require a c wireso in this case the g wire actually does control the hvac fan. This one uses the green wire as the c wire instead of the g fan wire.

Thanks for the info about leaving the blue unconnected. The old units terminals are labels 1 to 4. Its important to note that in some cases the color of the wire does not necessarily mean it connects to that came color one the board. Log in or sign up.

Upgrading from a 4 wire thermostat to a 5 wire thermostat duration. Heres how to wire a thermostat using the color code and fyi each terminals purpose. The correct way to approach this is to work out what function each wire has using the old thermostat and the wiring at the other end of the cable as clues and to wire to the appropriate terminals on the new thermostat. The color code was started to make jobs like youre tackling easier.

The picture above depeicts the typical wiring color code for a 4 wire thermostat. Note that wiring colors have no inherent meaning. The wires are all the same. I believe the live red connects to q11 the neutral yellow connects to q14 not sure what to do with the earth yellowgreen.

Honeywell thermostat wiring color code. The above is a typical wiring diagram of a nest thermostat with 4 wires. Solid copper wire covered with colored pvc insulation. As the neutral is not required then isolate the blue wire but do not.

The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. This is commonly found in standard hvac systems that use an air conditioner and a furnace. The main trouble is dealing with those different colored wires knowing which one does what and if that wasnt enough you also have numbers and letters to deal with. Thermostat wiring color codes explained the easy way.

Cookies qa how this site is financed and mses editorial. Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat.