When you look at your Thermostat, you will find different wires and their functions. Sometimes, you may get confused among them. You can also see that other colored wires are attached to different terminals.
But you also have to take care as these wires have different functions. To understand what y2 wire is and its roles and usage, continue reading this article.
What Is The Y2 Wire On A Thermostat?
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You all heard about this y2 wire connection on your Thermostat, but what are it? Y2 wires are for the cooling system. These are yellow wires and are used for this cooling purpose. And also, this wire is connected to the y terminal.
As we also mentioned above, these are essential to your HVAC system. Suppose you are not touching the y2 wire on the y terminal, then your HVAC will not be able to process the cooling function.
Y2 is The Thermostat Wire For The Second Stage Of Cooling
As we mentioned, this y2 wire is significant because your single Thermostat may contain two compressors on the HVAC system, providing different cooling and heating levels.
Also, if your y2 wire is not connected correctly to your Thermostat, it will not offer you a proper cooling system.
1.Y wire is for the first compressor (air conditioner units)
This y wire signals the HVAC system to start the air conditioner. After that, it goes through the air handler and then connects before going to the various wires.
2.Y2 wire is for the second compressor (air conditioner unit)
Y2 wire is used to cool your house faster. These can be found two in a single thermostat. The y1 is for 1st level of cooling, and this y2 is for a second. Don’t forget to connect both of them.
Y2 wires apply only if two air conditioner compressor units are running from one AC thermostat.
The reason and causes are already mentioned in the first paragraph. Kindly refer to that.
Other Types Of Wires
Looking at your Thermostat, you can find different wires and their functions. Usually, you may get confused about how to connect them to the right place, so today, we will mention all of them.
1.White Wires:
White wires are indicated through the w terminal. These are used to control the heat levels. W1 and W2 are also used to refer to these wire wires.
W2 wire handles the second stage’s low and high heat levels for gas furnaces. Sometimes you may have 2 AUX stages, so you must connect the AUX2 to w2.
2.Green Wires:
These wires are indicated by ‘G’ and are connected to the G terminal. These are for the blower fan; this is something that delivers cool and heats into vents.
3.Red Wires:
The R wire Rh or Rc wire is indicated for this red wire. These are used to supply power to the HVAC system.
There will be two terminals, Rc and Rh. Rh terminal is for heating purposes, and Rc is for cooling purposes.
If you can see your HVAC system, it has both terminals, and then power will be supplied by Rc wire. If there is only one transformer, fix a jumper inside for it. Mostly it has a jumper so be careful.
4.Common Wires:
These are usually found in two colors, blue or black, and these wires are connected to the air handler on your board.
It will supply 24-V AC power to your Thermostat, and also it will help you to complete the circuit. These will never support those systems which run on battery.
These are also indicated with X or B wire. Also, many companies claim that you will need this C wire to fix a thermostat, but it is not confirmed you can also install it without the ‘c’ wire.
FAQ
What Is A Two-Wire Thermostat?
Thermostats are of different types. Some have four wires, some have five wires, and some are having 2. The Thermostat has two wires from its backside and is known as a single pole. It can be either a ‘line voltage model’ or ‘low voltage model’.
Is RC The Same As C Wire?
The answer is no RC and C wire is not the same in Thermostat. RC is usually used for air conditioning systems, and C wire is for the power supply in the Thermostat.
What If There Is No C Wire For The Thermostat?
If you are not installing a c wire for your Thermostat, there is a battery inside the Thermostat. It will charge automatically from HVAC and usually works for cooling and heating purposes.
There Are Many Problems Which The People Face Without C Wire:
1. AC is making unnecessary noise.
2. Stocking fan rapidly.
3. Getting problem in working of a heat pump.
Can I Use The G Wire For The C Wire?
Yes, you can use G wire to C wire, but if there is no invisible C wire. You must also note that you can’t operate your fan independently while the heating and cooling aren’t running.
What Are S, S1, and S2 Wires?
These wires act as an alternative to C wire. They provide all the outside temperature-related information to the Thermostat. Some thermostats will not support C wire, but they do support S, S1, and S2 wires.
What Are The Four Wires In The Thermostat?
Usually, there are four wires in the Thermostat: red, green, yellow, and white. These are for power, fan, cooling, and heat, respectively. These are a very crucial part of any thermostat.
Bottom Line
While handling all these wires, ensure you turn off the main power. Watch and scrutinize them and try to read this article twice to understand better. You should install an excellent hardwired smart thermostat for your Airbnb.
Also, there will be a ‘recovery mode’ on your Thermostat; this means there may be an outage of power, or it may also happen because the AC is trying to ‘recover’ the temperature.
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