OEM Carrier Integrated Furnace Control Board for U19X100U36A

The integrated furnace control board is the brain of your Carrier unit, sequencing ignition, the inducer draft motor, the gas valve, and the blower in response to thermostat calls and feedback from the limit and flame-sense safeties. When it begins to fail, you'll see it: the furnace short-cycles, the blower runs continuously or never spins up, the unit ignores a heat call, or it lights for a few seconds and then locks out. A blinking diagnostic LED reporting a limit or flame fault while those components test fine almost always traces back to a worn board. This OEM board carries the complete onboard relay set — inducer, gas valve, and the 120 VAC heat/cool blower taps — along with the precise line- and low-voltage terminal strip matched to the U19X100U36A harness. It arrives pre-flashed with the correct ignition timing, flame-sense threshold, and lockout logic for this furnace, settings a universal replacement cannot duplicate. The control circuit operates at 24 VAC with 120 VAC line input. Why OEM matters here: a generic board may bolt in but run different relay ratings and timing, leading to nuisance lockouts, welded relay contacts, or an inducer that cuts out mid-cycle. Factory firmware protects the gas valve and igniter from mistimed energizing that shortens their service life. Install difficulty: 3 of 5. Have a 1/4" nut driver, a #2 Phillips, needle-nose pliers, and a multimeter on hand, and photograph the wiring before you start. Safety first — shut off the furnace breaker and verify zero voltage before disconnecting; this board carries line voltage. Ships same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.

Compatibility

This part is compatible with Carrier model U19X100U36A. Always verify the part number against your unit's data plate before ordering.

Why Choose OEM?

OEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.

Shipping & Returns

Same-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.