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The operation of the electric defrost heater and the hot gas solenoid is typically controlled by the defrost timer or a defrost control board in refrigeration systems. These components regulate the timing and activation of the defrost cycle, determining when to heat the evaporator coils to remove frost buildup. In some systems, a thermostat may also play a role by monitoring the temperature and signaling when defrosting is necessary.

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2w ago

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