Aprilaire 4238 Circuit Board
$31.86 USD
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Aprilaire 4238 Circuit Board
$31.86 USD
Circuit Board with wiring harness for whole house fan-powered humidifiers. Includes wiring harness. Replacement circuit board with transformer for many brands/models of whole house humidifiers. Same as Aprilaire 4238. Board includes relay and transformer that supply 115V to fan motor and 24V to solenoid when system humidistat switch calls.