Five Wire Thermostat Wiring Diagram

Thermostat wiring color code chart.

Five wire thermostat wiring diagram. Honeywell prestige wiring requirements need a minimum of 5 wires and maybe more depending on what features you want to operate humidifier etc. Some programmable thermostats eg. The diagram below shows how a basic 4 wire thermostat is connected as indicated by the color code chart above. The wiring for your honeywell thermostat depends on the functions of your heating and cooling system.

Youll probably see a thermostat jumper wire connecting the rc and rh terminals. Its there so you can supply power to the heating and cooling switches with a single wire which is usually red. 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. Only after youve done this disconnect the thermostat for replacing.

How to wire an air conditioner for control 5 wires the diagram below includes the typical control wiring for a conventional central air conditioning systemfurthermore it includes a thermostat a condenser and an air handler with a heat source. We have both a natural gas furnace and an ac unit. Ac service tech llc 15788 views. The table above provides a more complete list of honeywell thermostat wiring colors and their uses.

The basic heat ac system thermostat typically utilizes only 5 terminals. 4 wire or 5 wire thermostat wiring problem question. If you have heat and ac youll need 185. 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.

Even the most seasoned people who enjoy diy may come across problems with wiring a thermostat. Moreover the heat source for a basic ac system can include heat strips for electric heat or even a hot water coil inside the. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. We have a 19 year old condo with an old carrier mercury thermostat.

Color code how it works diagram. The additional 5th wire will be for common. Honeywell thermostat wiring diagram 4 wire examples. If youve only got heat 183 is sufficient but you may want to run 185 anyway for a bit of future proofing.

If you decide to get rid of your outdated thermostat for a smart or wifi thermostat be sure to mark the wires to indicate which color letter on the board they are connected to. Thermostat wire comes in various weights. Providing stepped down power from a transformer. 5 wire honeywell thermostat wiring.