The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above. The white wire connects to your heat.
Thermostat Wiring Diagrams 10 Most Common Youtube
Basic thermostat wiring diagram. In the most basic system this functionality is provided by use of a fan center relay and the low voltage wiring to the thermostat now will require a minimum of three wires for heat only units and four wires for heat cool fan for control. Our page top sketch courtesy of honeywell controls illustrates the wiring diagram for a traditional honeywell t87f thermostat used for 2 wire single pole singlei 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. To install your unit youll need to connect the correct wires to the terminals on the back of your new thermostat. Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat. 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. This additional terminal is labeled g in the thermostat.
It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Here is the industry standard thermostat wire color code used for most systems. Heat pumps are different than air conditioners because a heat pump uses the process of refrigeration to heat and coolwhile an air conditioner uses the process of refrigeration to only cool the central air conditioner will usually be paired with a gas furnace an electric furnace or some other method of heating. Thermostat wiring for dummies. The yellow wire connects to your. Basic thermostat wiring colors air conditioner systems always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down.
Understanding thermostat wiring colors is the next step. Heck now im not calling anyone a dummy. Thermostat wiring diagrams for heat pumps heat pump thermostat wire diagrams. The basic heat ac system thermostat typically utilizes only 5 terminals. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable.
Gallery of Basic Thermostat Wiring Diagram
