Midea WHS-169WES1, Service Manual

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Maintenance Service and Troubleshooting
2. Temperature is set incorrectly
Analysis of Problem
The temperature control knob is set to the "coldest" setting. This setting is for
fast freezing and can cause continuous running because the temperature for the
compressor to power off is too low, so it won't stop running until it reaches the
"coldest" temperature.
Solution
Check the temperature control knob to see if it is set to "coldest."
3. Thermostat is malfunctioning
Analysis of Problem
When the thermostat does not work properly, it will make the compressor run
continuously, causing the temperature to drop. The issue usually lies in the fact
that the contacts of the thermostat cannot be released.
Solution
Dismantle the thermostat and make a thorough examination. If it is out of
order, replace it with a new one.
4. Evaporation temperature is too high
Analysis of Problem
Refrigerant leakage and clogging in a refrigeration system will affect the
refrigerating capacity. Due to a lower refrigerating capacity, the refrigerator
temperature cannot reach its rated value and the thermostat will malfunction, so
the compressor will continue to run. When the evaporation temperature in the
system is too high, the temperature-sensing agent in the temperature sensor will
also be hot, so the thermostat will be unable to cut off the power supply to the
compressor and stop it.
Solution
If the amount of refrigerant is insufficient, recharge the system with refrigerant.
If clogging occurs, disassemble the clogged part. If the evaporation temperature
is too high, resolve this problem with an appropriate amount of refrigerant.
5. Damaged thermal insulation layer and/or door seal
Analysis of Problem
When the thermal insulation layer inside the casing deteriorates or the door
seal does not touch the doorframe, the temperature in the refrigerator will rise
and make the compressor continuously run.
Solution
Check the thermal insulation layer for damage. If damaged, repair it. If the
door has deformed or the door seal does not close tightly against the casing,
repair or replace seal/gasket.
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