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Thermostats
P/N 550005663 P/N 550005664
Air Defrost Evaporators Electric Defrost Evaporators
P/N 550005663 is used on all Air Defrost model evaporators and features a built in Air
Defrost time clock. The default defrost settings are every 6 hours for 30 minutes. See
pages 27-28 for default and custom defrost setting instructions.
P/N 550005664 is used on all Electric defrost model evaporators. See page 29 for
Electric Defroster Timer setting instructions.
NOTE: The 550005664 display will be blank during the electric defrost cycle.