Test the compressor relay for continuity
using a multitester.
Set the multitester to the ohms setting X1.
With the relay upside down, place the probes
into the terminals labeled "S" and "M". The multitester should
display a reading of roughly zero ohms, indicating continuity (or if using
a continuity tester, it should light up).
With the probes still in place, turn the relay
over. You should hear the click of the magnetic switch engaging.
The multitester should now display an ohm reading of infinity
(or the tester should not light up).
Turn the relay upside down again, place the
probe on the "S" terminal and place it on the side terminal labeled
"L".
The multitester should now display a reading
of roughly zero ohms (continuity). Turn the relay over and the reading
should change to infinity.
With the relay upside down place one probe on
the "L" terminal and the other probe on terminal labeled "M".
The multitester should display a reading of
roughly zero ohms. Turn the relay over and the reading will stay the same,
zero ohms.
If the compressor relay does not pass all of
these tests, it should be replaced.
