EPA Section 608 Technician Certification (Universal)

What causes 'coil freeze-up' on an evaporator coil?

Overcharge of refrigerant causing high suction pressure Insufficient airflow or low refrigerant charge causing suction pressure to drop below freezing High outdoor ambient temperature reducing system capacity Dirty condenser coil reducing heat rejection

Correct Answer:

Insufficient airflow or low refrigerant charge causing suction pressure to drop below freezing

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