The answer to 'furnace not cooling' is that the most common causes are a clogged air filter, refrigerant leak, or faulty blower motor. Symptoms include warm air coming from the vents, the system running constantly, and high energy bills. Solutions may involve replacing the air filter, repairing refrigerant leaks, or replacing the blower motor. However, it's best to call an HVAC professional to properly diagnose and fix the issue, as trying to DIY can be dangerous and may cause further damage.
Furnaces are complex systems, and trying to repair them without proper training and tools can be risky. An HVAC technician will have the expertise to identify the root cause and make the necessary repairs safely and effectively.