1. Disconnect the power supply, remove the unit, and remove the plastic cover. compartment cover of the unit, and remove the plastic cover.
2. Remove the relay from the compressor terminals and inspect the relay terminals for burn discoloration and the wires for charred insulation. If so, replace the relay.
3. Holding the starting relay with the top up, touch one probe to the terminal that connects to the compressor run terminal and the other one to the terminal that connects to the compressor start terminal. The ohmmeter should show an open circuit reading on the RX1 scale; otherwise, the relay is defective.
4. Touch one probe to the relay terminal on the outside and the other probe to the relay terminal that connects to the compressor start terminal. The ohmmeter should register an open circuit. Otherwise, the relay is bad. (See fig. 46a)
5. Now turn the starting relay upside down and touch one probe to the relay terminal that is connected to the compressor run terminal and the other one to the relay terminal that connects to the compressor start terminal. The meter should register a zero reading on the ohmmeter. Otherwise, replace the relay.
