LiftMaster light socket 175C147 is a quick replacement to a bad socket. Check chart below to confirm compatibility.
Replaces parts: 175C121 and 175C123
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Compatible with LiftMaster 1000SD, 1000SDR, 2000SD, 2000SDR, 2110, 2220, 2500, 2500B, 2500D, 3110, 3130, 3130M, 3220, 3240, 3240M and 3500 models