Getting Colder, need advice

[Gary]

We seem to be getting strange SH readings. I'm thinking the accumulator is filling with liquid during the off cycle and the SH readings are low during the on cycle until the accumulator empties.

Liquid will form in the evaporator while the system is off. If the suction line goes from the bottom of the evaporator down to the accumulator, the liquid in the evap is transported by gravity to the accumulator.

This is easily remedied. Where the suction line leaves the evap, run the suction line up to the top of the evap and then back down to the accumulator. This traps the liquid in the evap.