Except in either (min or max) temp selector detent position, the control of the monovalve is in the hands of the electronic unit for temperature control. Evidently, you have a problem in that circuit. The "min" detent provides a constant ground path to the monovalve (except in defrost) which keeps the valve closed.

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When cryptography is outlawed, bayl bhgynjf jvyy unir cevinpl.