Refrigeration & Air Conditioning USCG Question #259 (Set 5)

If the superheat value of the thermostatic expansion valve is adjusted too high, what would be the result?

Official USCG Answer & Rule Citation

Correct Answer: Option A — the suction line of the compressor will be abnormally warm

An excessively high superheat setting starves the evaporator of liquid refrigerant, reducing cooling capacity and causing the compressor suction line to run abnormally warm due to early vaporization and prolonged superheating.

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