Single Stage Furnace Thermostat Wiring

Verify that the red wire is connected to the r terminal green wire to the g terminal and white wire to the w terminal.

Single stage furnace thermostat wiring. The thermostat you purchased is designed for a single stage system such as an air conditioner and a single stage gas furnace. Basically heating furnaces are of two types. A dual fuel system which is comprised of a gas furnace and a heat pump should be connected to a thermostat or control system that can accommodate the specific heating set points. That is a basic honeywell thermostat wiring diagram for a single stage heat pump.

If not connect them in this manner. Cadet 16 7 amp 120 208 240 volt single pole electronic 7 day programmable wall thermostat in white. How to choose the right furnace thermostat. A two stage thermostat may need more wires than your current programmable thermostat.

A basic two wire thermostat can be compared to a simple single pole switch that you will find throughout your home only instead of you turning the switch on and off as required a mechanical or electronic temperature controlled mechanism is the operator of the switch. Single stage hvac system thermostat source. A two stage or variable speed system may only be operating at a single speed because the thermostat or control system doesn t allow for two stage wiring. The e and w2 hook ups are for the emergency heat relay and auxiliary heat control respectively.

The first and foremost thing you must do is to check what kind of heating system you are using at your home. One which is common is the single stage heating system and the other one is multi stage heating system. The terminals are usually marked r and w. Strip the brown thermostat wire back one half inch and connect it to the w2 terminal on the furnace.

So you may have to fish an additional four strand cable from the furnace room to the thermostat location photo 1. The new thermostat doesn t have these because it isn t designed for this type of installation. Conventional single stage systems will have one wire leading into w or w1 terminal for heating and one wire leading into y or y1 terminal for cooling. So that s the easiest way to identify single stage conventional hvac systems which would be furnace based or boiler based.

The thermostat only kicks in the second stage if the furnace can t maintain 6 to 8 degrees per hour. This controls the second stage of heating.