I did replace the compressor and evaporator and heat exchanger on the sub zero model 680/s
Everything is running but not compressor,
Please I need advice and seal system service manual .
I did replace the start relay
See complete diagnostics manual for the Sub-Zero 600 series through the 690.
1) Do you have 115 volts to the compressor relay.
2) If not you may have an open thermostat / temperature control.
3) If 1-2 are not the issue go the control board for diagnostics in the manual, you may have a defective control board not sending 115 volts to the compressor relay.
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