Single Stage Furnace Thermostat Wiring

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.

Single stage furnace thermostat wiring.

Furthermore this thermostat wiring diagram is specifically for a system with two transformers your system likely only has one transformer as most typical residential systems only use a single transformer for control. 1 know your heating system. Basically heating furnaces are of two types. The terminals are usually marked r and w.

Verify that the red wire is connected to the r terminal green wire to the g terminal and white wire to the w terminal. The thermostat you purchased is designed for a single stage system such as an air conditioner and a single stage gas furnace. How to choose the right furnace thermostat. If not connect them in this manner.

That is a basic honeywell thermostat wiring diagram for a single stage heat pump. The new thermostat doesn t have these because it isn t designed for this type of installation. A two stage thermostat may need more wires than your current programmable thermostat. This controls the second stage of heating.

The thermostat only kicks in the second stage if the furnace can t maintain 6 to 8 degrees per hour. Single stage hvac system thermostat source. The first and foremost thing you must do is to check what kind of heating system you are using at your home. Cadet 16 7 amp 120 208 240 volt single pole electronic 7 day programmable wall thermostat in white.

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. 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. If you have a two stage heat pump then you will also utilize terminal y2 for the second stage. So that s the easiest way to identify single stage conventional hvac systems which would be furnace based or boiler based.

Strip the brown thermostat wire back one half inch and connect it to the w2 terminal on the furnace. The e and w2 hook ups are for the emergency heat relay and auxiliary heat control respectively.