The KLIMA Is probably bad -- the signal goes from the PBCU to the
KLIMA to the low pressure switch on the receiver/dryer. If the KLIMA
relay has burned contact, it won't switch the compressor on no matter
what you do as the clutch current goes only through that relay contact
set.
Check the resistance of the clutch coil as well -- a shorted clutch
will simply burn out another KLIMA relay in sort order.
Peter
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