Aprilaire #4238 circuit board for 4238 700, 760, 760a, 768.? includes wiring harness.? this part does not work with the 700a/700M models (see relay part # 4740)
Aprilaire 4238 control board for the 4238 700, 768, 760. Circuit board length measures 4', width is 2' and 11/2 inch high. This controller mounts on the motor board bridge (rp-4243)
The Aprilaire 4238 700a, 700M and 700 manufactured in 2008 and later are Series two and designed primarily for an automatic humidistat. To turn-on these units require a humidistat that sends 24V to the humidifier

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 3.2 inch
Height : 2.1 inch
Length : 4.4 inch

Item Weight: 1 pounds (View shipping rates and policies)
Shipping Weight: 13.6 ounce (View shipping rates and policies)

ASIN : B0054KO0LG