Compressor Clutch Diode HVAC: Testing and Inspection

Fig. 28 Diode.:

NOTE: The diodes are designed to pass current in one direction and block current in the opposite direction.
1. Using an ohmmeter, check the diodes Fig. 28.
2. Connect the positive to terminal 1 and negative to terminal 2 there should be continuity.
3. Reverse the leads and recheck there should be no continuity.
4. check the other diode (terminals 3 and 4)
5. Connect the positive to terminal 3 and negative to terminal 4 there should be continuity.
6. Reverse the leads and recheck there should be no continuity.