What if my thermostat has only two wires?
If your heating system has only two wires, the job of the thermostat is simple. All it has to do is turn the heat or the cooling on and off. There’s also no thermostat blue wire, or common wire, to power the thermostat, so it has to operate on its own, either using batteries or mechanical temperature detection.
Can I install a WIFI thermostat with only 2 wires?
2 Wire HVAC systems generally fall into two categories which are heat only or cooling only systems. High voltage systems aren’t compatible with 2 wire wifi thermostats but, most typical HVAC systems are low voltage systems and are compatible with 2 wire thermostats.
What is a two wire thermostat?
If we put it simply, a 2 wire thermostat is one that has only 2 wires coming out of its backside. As you already know, there are different types of thermostats serving different types of heating/cooling systems. So any thermostat with only 2 wires coming out of its back is generally named a 2 wire thermostat.
How do you change a 2 wire thermostat to a 4 wire?
How to Wire a 2-Wire Thermostat to a 4-Wire System
- Remove the fuse or trip the circuit breaker in the fuse box that supplies power to the thermostat and the unit that it controls.
- Remove the cover from the thermostat.
- Remove the screws from around the thermostat with the Phillips jeweler’s screwdriver.
What is the difference between a 2 wire and 4 wire thermostat?
If you see two wires coming out of it in the back you have a single pole. If there are four wires, you have a double pole. If you have more than four wires coming out of your thermostat, you most likely have a low voltage one, which would be used to control a central furnace, boiler, or something similar.
What is the difference between 2 wire and 4 wire thermostat?
How do I change a 2 wire thermostat to a 4 wire?