I used this defrost control board as a retrofit for an Armstrong SHP12 heat pump. Armstrong is a division of Lennox, and the 46K67 control board was the recommended replacement.
The board mounted in the same holes as the original board. You should download the Armstrong service bulletin SVB04-2 which describes the retrofit procedure. The 46K67 ships without a jumper for the high presure input. The jumper is needed if your heat pump doesn't have a high pressure switch, which mine didn't. Fortunately, I had some old jumpers from a computer motherboard which worked just fine in this application.
Pay attention to the Armstrong bulletin, as there are selectable options/features on this board which require jumper settings.
tunnelray
Allentown, PA
13 years ago
Verified Buyer
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