When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
ST9120C 4057 gas furnace hvac control board HQ1011927HW st9120c4057 tested good:
$79.99
ST9120C 4057 gas furnace hvac control board HQ1011927HW
Tested before removal from a fully-functional unit.