If you are unsure about the specific model of your Honeywell thermostat, there are a few ways to find out. Firstly, you can check the front or sides of the thermostat for any visible model numbers or names. These are usually located near the display or control buttons. Additionally, you can remove the thermostat from the wall plate and look for a label on the back that provides the model information. If you are still unable to identify the model, you can visit the HVAC Alliance Expert website, where Our specialists can assist you with any questions or concerns related to thermostat repair or installation.