Maytag refrigerator model number
MSD2641KEW was not cooling very good.
Could tell the refrigerator had not been self defrosting as it should have been because of the frost build up in the freezer.
I check the defrost heater and defrost thermostat for continuity with my multimeter and found them to be ok.
To repair this refrigerator I replaced the Defrost Control Board, part #
67004704I hope you find this helpful.
Here are the parts for the defrost system if you need to order them.
Defrost Control Board, part #
67004704

Defrost Heater Assembly, part #
67004188

Defrost Thermostat, part #
67004757
