Will a dirty condenser coil cause ac to freeze up?

Yes, a dirty condenser coil can cause an air conditioning unit to freeze up. When the coil is dirty, it restricts airflow and prevents the heat exchange process from functioning properly, leading to low refrigerant pressures and ice formation on the evaporator coil. This can ultimately result in reduced cooling efficiency and potential damage to the system if not addressed. Regular maintenance and cleaning of the condenser coil can help prevent this issue.