Nope, It doesn't work that way.
In heating mode, it goes like this (even with a cap tube):
Hotter Evaporator-> Higher suction pressure -> Higher mass flow -> Higher CR -> Higher compressor Amps -> Higher COP and discharge temperature
Colder Evaporator -> Lower suction pressure -> Lower mass flow -> Lower CR -> Lower Compressor Amps -> Lower COP and discharge temperature
Frozen Evaporator -> Lowest suction pressure -> Lowest mass flow -> Highest CR -> Highest Compressor Amps -> Lowest COP and Highest discharge temperature
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