Buying a Used Mysa

Last updated: November 14, 2026

If you bought a used Mysa, moved into a home with Mysa already installed, or received a Mysa from a previous owner or tenant, this article tells you how to add it to your account.

A used Mysa can still be on the previous owner's account. Until it is removed from that account, you cannot pair it.

Before you buy

If you can, ask the seller or previous owner to remove the Mysa from their Mysa account before you take it. A factory reset is not enough, and sharing access does not transfer the Mysa to you.

If they are leaving all of their Mysa thermostats, they can also use Delete Home in the app. That removes every Mysa in that Home from their account.

For the steps the previous owner should use, see the Removing and Resetting article for your product (linked under After the transfer), or Sharing Will Not Transfer a Used Thermostat.

When you get the Mysa

  1. Install the Mysa app and create an account, or sign in.

  2. On the home screen, tap +, then tap Add a Mysa.

  3. Follow the pairing steps in the app.

If pairing works, you are done. For the full pairing steps for Mysa for Electric Baseboard Heaters, see Pairing Your Mysa for Electric Baseboard Heaters.

If the app says Can Not Pair This Mysa

The app can show Can Not Pair This Mysa. This message tells you that the Mysa is still on another user's account. See Thermostat Not Appearing During Pairing.

Ask the previous owner

Ask the previous owner to remove the Mysa from their account. Then pair the Mysa in your account.

Note: A factory reset alone does not remove the Mysa from the previous owner's account. It only clears local settings and pairing data. Sharing access also does not transfer a used Mysa. See Sharing Will Not Transfer a Used Thermostat.

If you cannot reach the previous owner

Ask Mysa support for an ownership transfer. Send an email to support@getmysa.com and include:

  • A clear photo of the serial number.

  • The email address on your Mysa account.

[CONFIRM: Ownership Transfer and the pairing articles ask only for a serial-number photo. The mini-split Removing and Resetting article and the internal transfer playbook also ask for a photo of the Mysa ID. Should this article require the Mysa ID, or only the serial number?]

Where to find the serial number:

  • Mysa for Electric Baseboard Heaters and Mysa for In-Floor Heating: The serial number is behind the front plate. Turn off the circuit breaker and make sure the power is off before you remove the front plate. Loosen the screw on the bottom of the front plate, then slide the front plate off.

  • Mysa for Mini-Splits: Check the back of the device.

For the full steps, see Ownership Transfer for a Used Thermostat.

After the transfer

After Mysa support removes the Mysa from the previous account, pair it in your account. Tap +, then tap Add a Mysa.

If the Mysa appears in your app but shows as disconnected, delete it from your account, put it in pairing mode, and pair it again.

Use the article for your product for reset and pairing steps:

Related articles

Get support

Email: support@getmysa.com