Heil Evaporator Coil Icing

Heil air conditioner frequently freezes up; ice forms on the indoor coil or suction line

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Low airflow from dirty filter or blower issues, Low refrigerant charge, Faulty TXV, Closed or blocked supply/return vents

Safety first: Turn the system OFF and set the fan to ON to thaw ice. Do not chip ice off the coil.

Step 1 – Thaw completely: Allow several hours for all ice to melt. Place towels or a pan under the air handler if needed.
Step 2 – Restore airflow: Replace filters, open all vents, and ensure interior doors are open for good circulation.
Step 3 – Clean blower and coil: Clean dust from the blower wheel and evaporator coil.
Step 4 – Technician check: If icing recurs, a technician must check refrigerant charge and TXV operation.

Medium 3/5

TXV (Thermostatic Expansion Valve)

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