Replacement for Carrier LH33WP003/3A control boards
Low cost, form, fit and functional replacement ignition control
Direct Spark Ignition (DSI) control board
Microprocessor based
Controls combustion, blower and indoor motors, spark ignitor, gas valve
Monitors timing, trial for ignition, flame sensing and lockout
100% lockout safety feature
Compatible with LP or natural gas
Status LED for fault codes to aid in troubleshooting
Timing: pre-purge: 45 sec, trial for ignition: 5 + 2 sec, retry period: every 20 sec for 15 min, lockout: manual reset, post-purge: 45 sec
Red LED: Steady ON-normal operation
Flashing-fault codes inputs: Power - RT and C, thermostat interface - R, W, and G, safety switches - RS, LS, and CS, combustion motor hall effect sensor
Flame sensing outputs: spark - gas valve: GV, combustion motor: CM, blower motor: BM, indoor fan motor: IFO