A thermostat controls your home’s indoor temperature.
When it breaks down, you will not be able to regulate your HVAC system, and in turn, fail to keep your home’s indoor environment comfortable, often, when a thermostat breaks down, it becomes unresponsive.
It fails to detect and adjust to temperature swings as you had anticipated. Occasionally, it may fail to signal your HVAC component to turn on as expected. In some cases, it would turn the HVAC component on and will not turn it off at all, then a thermostat could cut down because of a wiring defect that disrupts signal transmission between the thermostat plus your HVAC equipment, and this could cause the system to start and stop unnecessarily. This short-cycling causes temperature change inside your home, then some rooms will not get conditioned air to heat or cool the room. Short cycling also strains the compressor plus raises electricity bills. Check your thermostat’s calibration to ensure it is correct. A faulty thermostat’s screen will be blank and will not have a backlight even after a battery change. It could also cause the blower fan to run continuously or fail to start at all. Check the wires that run from the thermostat to the central A/C and fix them if they are faulty. A thermostat could also have lost its connection to the compressor when the fan is running. Therefore, the HVAC system will not blow cool air from the vents. If you experience any of these troubles, you need to call an HVAC supplier to fix your thermostat, better yet, troubleshoot your thermostat plus determine the best course of action, and replace the HVAC system’s thermostat if it is completely broken.