How does a split AC thermostat work?

An electromechanical thermostat typically contains either a bi-metal coil or a metal strip. When the temperature changes, this coil or strip will move, causing a vial containing mercury to tip to one side. The mercury flows to one end of the vial, signaling that the heating or cooling needs to be turned on.

Where is the thermostat in split AC?

The thermostat sensor is located near the evaporator coils. These coils are inside your air conditioner unit. As the air is sucked through the return vents, the air passes by the sensor and the coils. As the air passes the sensor, it reads the temperature and compares that reading to the setting on your thermostat.

What does it mean when your house has two different thermostats?

Often, when the upstairs and downstairs are two different temperatures, it means that one of the units is running all the time while the other barely runs. That said, this also depends on whether you have a single-zone or dual-zone thermostat. With a single-zone thermostat, both the upstairs and downstairs are cooled by the same device.

Is it possible to have two air conditioners in a house?

Having two units also doubles the chance of system failure and increases the cost of repairs overall. It is possible to install a single central air-conditioning unit, with two or more thermostats, that can cool the house evenly.

What should the air conditioner thermostat be set at?

Thus, most people keep their air conditioning thermostat set at 72 to 74 degrees Fahrenheit. You should also think about the temperature settings while you’re away, such as at work. Most people don’t think about it, but you should raise the temp while you’re gone.

What should I set my second stage thermostat to?

Next, you will want to find the differential temperature setting that controls the second stage. This too should be a setting in the thermostat. I set most to a 3° F. differential setting. In other words, if you set the thermostat for 72° F. it will run at a single stage.