Can I install a new thermostat by myself?

Can I do it myself? An experienced DIY-er can install most programmable thermostats and some smart thermostats. Don’t forget to turn off the breaker to the HVAC equipment!

Where do the wires go on a thermostat?





The white wire underneath your thermostat connects to your heating system. It terminates at your air handler or furnace. The white wire connects to terminal W in industry-standard thermostats.

How do I replace an old thermostat with a new one?

How to Replace an Analog Thermostat

  1. Step 1: Carefully Select New Thermostat. …
  2. Step 2: Shut Off Power to The Furnace. …
  3. Step 3: Remove the Faceplate From the Current Thermostat. …
  4. Step 4: Label the Wires. …
  5. Step 5: Disconnect the Wires and Remove the Wall Plate. …
  6. Step 6: Mounting the New Thermostat. …
  7. Step 7: Rewiring.

Is it hard to wire a new thermostat?

Connecting the wires on your new thermostat isn’t that difficult. On the mount, you’ll notice that there are letters. Each letter stands for a different colored wire: “G” – green, “R” – red, and so on. Simply insert each colored wire in its corresponding initialed receptor.

How do I know if my thermostat is compatible?

Quote from the video:
Quote from Youtube video: System to see if your hvac system is compatible with the nest thermostat go to nest.com. Works select nest thermostat.

Can I replace my thermostat with any thermostat?





Purchase a replacement thermostat that will work with your system. Review the compatibilities listed on the packaging of the replacement thermostat. Most replacement thermostats are compatible with all common systems. However, if your system is unique, finding a replacement thermostat may be difficult.

What happens if you wire a thermostat wrong?

Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.

What color wire goes where on a thermostat?

This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).

How many wires does a thermostat need?

2 wires



The most basic thermostat has 2 wires; usually a red and a white wire. Two wire thermostat wiring is used for furnaces only and usually doesn’t need a “C” or “Common” wire. That’s why we only need two wires: Red wire for power (24h).

How do I replace a thermostat in my house?

Quote from the video:
Quote from Youtube video: You can remove the thermostat from the wall by simply unscrewing the mounting hardware. Once you've removed the cover place a piece of tape on each of the wires with the letter code of the terminal.

How do you wire a 4 wire thermostat?

Quote from the video:
Quote from Youtube video: So remember blue to yellow if there's no yellow wire there and then you go green to green white to white red.

What are S1 and S2 wires on thermostat?



S, S1, S2: These wires run directly outside and provide outdoor temperature information to the thermostat.

What are R and Rc wires on thermostat?

There is no standard for the colour of the RH wire, but most units use a red one. The RC wire, on the other hand, refers to “red cooling”. It’s the same with the RH wire in that it powers the thermostat. For the RC, it powers the cooling system.

What does W1 and W2 mean on a thermostat?

W/W1 and W2. In a conventional system, W/W1 controls your heating system and, where applicable, W2 controls your heating system’s second stage, which helps warm the home faster.

What does RC and RH mean on a thermostat?

RC: The RC terminal is the 24-volt cooling power supply. RH: The RH terminal is the 24-volt heating power supply. (Note: The RC and RH terminals are jumpered together in a four-wire heat/cool system and a single-stage heat pump system but not in a five-wire heating/cooling system.)

Does my R wire go to RC or RH?



An R wire can go into a Nest Learning Thermostat’s Rc or Rh connector.

Do I connect red wire to RC or RH?

If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc. If you only have a single R wire, then it will only have an R connector, which is the connection you’ll use.