TRANE OEM Integrated Direct Spark Ignition Control Module CNT03457

The Trane CNT03457 is a genuine OEM integrated direct spark ignition (DSI) control board that acts as the brain of compatible Trane and American Standard gas furnaces and packaged rooftop units. It coordinates spark ignition, flame sensing, gas valve operation, blower timing, and safety interlocks so the unit lights reliably, runs the correct sequence, and shuts down if a flame, pressure, or limit fault is detected.

OEM construction matches factory timing, voltage, and connector layout, which reduces misfires, short cycling, and “won’t stay lit / blower won’t run” failures that aftermarket boards often introduce. Diagnostic indication helps techs pinpoint a failed relay, flame-sense issue, or lockout instead of guessing. Direct-spark ignition lights the burner quickly without a standing pilot or hot-surface igniter, supporting cleaner combustion and fewer nuisance lockouts when the rest of the system is healthy.

Use this board as a drop-in on later CNT03457 / CNT3457 applications. On older CNT02216, CNT02217, CNT01634, and CNT01669 boards, pair it with Trane KIT06839 (adapter board + harnesses) so wiring and mounting line up. Always match the unit model and existing board number before ordering.

Dimensions

• Approx. overall: 5.65 in L × 5.55 in W × 3.45 in H (14.35 × 14.10 × 8.76 cm)
• Board footprint (alternate listing): about 5-1/8 in × 4-7/8 in
• Weight: about 2 lb

Compatibility

Replaces / supersedes (verify your existing number):
CNT03457, CNT3457, CNT-3457, CNT03456, CNT3456, CNT04717 / CNT4717, CNT02216, CNT02217, CNT01634, CNT01669, CNT1634, CNT1669, X13650874-010, White-Rodgers / Emerson 50N02-495-91 / 50N2495B1, and related numbers. Older boards often need KIT06839.

Common equipment types:
Trane / American Standard packaged gas units and RTUs (YCY, YHC, YSC families), plus some furnaces and heat-pump packaged units that use this DSI module. Parts Town lists ~260 compatible models.

Example model families (wildcards shown as listed by suppliers):
YCY036 / YCY042 / YCY048 series (e.g. YCY036F3H0AE through YCY048F4H0AH)
YHC072 / YHC092 / YHC102 / YHC120
YSC072 / YSC090 / YSC092 / YSC102 / YSC120

Always confirm against the unit data plate and the board currently installed. Compatibility lists on reseller sites are not exhaustive and can omit suffix variants.