Hello, rule of thumb is 20 degrees across the evaporater. This is for a system that is using the refrigerant designed for it.I think you need a 134a expansion valve. Any valve that you buy is probably a 134a valve.134a works at as higher pressure. This allows too much refrigerant through the valve, flooding the evaperator a bit.Not enough evaperation of refrigerant occurs. Cooling happens with evaperation. Just like sitting beside the pool. Ahhhhhh |
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