Rheem Home A/C 90-101229-01 Rev 3 Wiring Diagram


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Route all SoftStart wires into the electrical box. Then crimp connectors onto all SoftStart Home wires as indicated in drawing.

Step 1. Follow Red Compressor wire from Compressor to T3 terminal on Contactor Block. Disconnect Red wire from Block, cut off Eye Ring, crimp Female connector on end, and connect it to Blue SoftStart wire. Tape connection.

Step 2. Connect Black SoftStart wire onto the T3 terminal that the Red Compressor wire was on.

Step 3. Connect Yellow SoftStart wire onto “H” HERM terminal on Run Capacitor next to Purple Compressor wire.

Step 4. If you see a second Purple wire on the “H” HERM terminal, disconnect the second Purple wire, tape the end and drop it.

Step 5. Follow Black Compressor wire FROM the Compressor to the T1 terminal on the Contactor Block. Disconnect Black Compressor wire, cut off Eye Ring, crimp Female connector on end, and connect it to Brown SoftStart wire. Tape connection.

Step 6. Connect Red SoftStart wire onto the T1 terminal that the Black Compressor wire was on.

Secure all wires. Tape connections with electrical tape.

Turn Power and A/C Breaker on. Turn A/C to Auto Cool setting and set the thermostat to 55ºF.

Look at SoftStart LED lights. Run LED 1 light should be “on”. Green light means the Compressor is running (there may be a full 3-minute delay before Green light comes on). IF there is no Green light after 4 minutes, call SoftStart Tech Support for assistance.

After establishing Green light operation, re-install all A/C covers.

Turn A/C on, set near to outdoor temperature and run for 30 minutes.

After 30 minutes, operate A/C normally.