Symptoms

Suction pipes frosted

Likely Cause

1. Excessive passage of gas through the expansion valve or valve oversized
2. Expansion valve locked in the open position
3. The evaporator fan motor does not work
4. High gas charge

Remedy

1. Adjust the valve or replace it with one of the correct sizes
2. Clean foreign bodies from the valve and replace if necessary
3. Find the cause and remove it
4. Reduce the charge

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