The answer to 'thermostat not cooling' is that the most common causes are a thermostat issue, a problem with the air conditioning unit, or a blockage in the air flow. Symptoms may include the home not cooling down, the AC running constantly, or warm air blowing from the vents. Solutions can range from simple DIY troubleshooting to more complex repairs that require a professional HVAC technician.
If the thermostat itself is not working properly, you may be able to replace the batteries or recalibrate the settings. However, if the issue is with the AC unit or air flow, it's usually best to call in a professional HVAC technician to diagnose and repair the problem. They have the specialized knowledge and tools to properly inspect the system and get your cooling back up and running.