Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This OEM Carrier furnace control board (HK42FZ011) is the brain of the GA1AAD024065ACJA gas furnace, controlling hot-surface ignition, blower and inducer timing, gas valve sequencing, and onboard diagnostic fault codes. If your furnace won't fire, locks out, or throws blinking LED errors, a degraded control board is one of the most frequent failures. Built to exact Carrier engineering specifications, this genuine board guarantees correct flame sensing, safety lockout, and timing behavior on the GA1AAD024065ACJA that generic replacements often get wrong. Installation is moderate: an experienced DIYer can complete the swap in 30-45 minutes by labeling and transferring connectors after killing power, but a licensed technician is advised for any gas-fired equipment. Get your heat back and eliminate nuisance lockouts with the exact part Carrier designed for your unit. In stock and ships same-day on orders placed before 3PM CST, with tracked delivery and our full fitment guarantee for peace of mind.
This part is compatible with Carrier model GA1AAD024065ACJA.
Same-day shipping before 3 PM CST. 30-day returns on uninstalled parts.