What is a Thermostat Jumper Wire and What do I do if I Have One?

Below is a table of common jumper connections you may see on your old thermostat base.

Sensi Smart Thermostat

The jumper wire connecting terminals RC and RH are most common, and this jumper wire is not necessary on Sensi thermostat. Sensi thermostat has a built-in RC/RH jumper wire on the back of the thermostat face plate.

Clip the RC/RH jumper wire on the Sensi thermostat if you have two separate wires (one running to RH and the other to RC) on your old thermostat that are coming from the wall. This indicates you have a two-transformer system.

If you accidentally clipped the RC/RH jumper on the back of the Sensi thermostat and did not mean to, you will need to re-jumper those two terminals.

To create a new jumper for RC/RH, use a short piece of thermostat wire, strip the insulation off both ends of the wire and bend it in half. Connect one end to RC and the other end to RH on the wall plate. Leave the wire that comes out of the wall attached to either RC or RH.

Sensi Touch Smart Thermostat

The jumper wire connecting terminals RC and RH are most common, and this jumper wire is not necessary on Sensi thermostat. Sensi thermostat has a built-in RC/RH jumper wire on the thermostat base.

Clip the RC/RH jumper wire on the Sensi thermostat if you have two separate wires (one running to RH and the other to RC) on your old thermostat that are coming from the wall. This indicates you have a two-transformer system.