Johnson Controls Y63F22 0 Transformer 321894 706 a failure of the pressure a failure of the pressure switch to close during the pre purge cycle Confirm that the control board is delivering 24VAC to the PV (pilot valve) and MV (main valve) terminals use a Y65 series multi tap transformer Superior Isolation: Split bobbin design delivers high dielectric strength and optimizes primary to secondary circuit separation
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Johnson Controls Y63F22-0 Transformer 321894-706 a failure of the pressure