The answer to 'furnace blowing hot air' is that there are several common causes, including a thermostat issue, a problem with the furnace's heating element or control board, or a blockage in the air ducts. Symptoms may include the furnace continuously running, the air feeling overly hot, and high energy bills. Potential solutions include checking the thermostat settings, cleaning or replacing air filters, and inspecting the furnace for any malfunctioning components.
If the issue persists or you're unsure of the cause, it's best to call in a professional HVAC technician. They can diagnose the problem and make any necessary repairs or replacements to get your furnace back to normal operation.