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Rational service code 21

Question asked by scottm on May 16, 2019
Latest reply on Jun 25, 2019 by rationaltechnician

I have a mod.#  SCC-62G that periodically shows a service code 21 and that it is in emergency mode.  According to the code sheet this is a faulty micro switch for the clima control.  The switch tests good.  It also states that the humidity control could be faulty. Is this humidity control inside the pipe that the humidity control motor is attached to?  What determines when that motor gets energized?