The answer to 'HVAC system freezing up' is that a frozen HVAC system is a common issue that can be caused by several factors, including low refrigerant levels, a blocked air filter, or a malfunctioning thermostat. Symptoms of a frozen HVAC system may include reduced airflow, ice buildup on the coils, and the system shutting off intermittently.
In many cases, the issue can be resolved through simple DIY troubleshooting and maintenance. However, if the problem persists or you are unsure of the cause, it's best to call a professional HVAC technician to diagnose and fix the issue. They have the expertise and tools to properly identify and address the root cause of the problem, ensuring your HVAC system is running efficiently and safely.