A control component 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 control component breaks down, it becomes unresponsive, it fails to detect as well as adjust to temperature changes as you had anticipated. Occasionally, it may fail to signal your heating and A/C component to turn on as expected. In some cases, it would turn the HVAC component on and will not turn it off at all, a control component could break down because of a wiring defect that disrupts signal transmission between the control component and your HVAC equipment. This could cause the plan to start and stop unnecessarily. This short-cycling causes temperature swings inside your home. Some rooms will not get conditioned air to heat or cool the room. Short cycling also strains the compressor and raises electricity bills, check your control unit’s calibration to ensure it is correct. A faulty control unit’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 control component to the central AC as well as service them if they are faulty. A control component could also have lost its connection to the compressor when the fan is running. Therefore, the HVAC plan will not blow cool air from the vents. If you experience any of these problems, you need to call an HVAC professional to service your control unit. Better yet, troubleshoot your control component as well as determine the best course of action, however replace the HVAC system’s control component if it is completely broken.