Furnace Control Boards
Carrier Replacement Boards
ICM291
Furnace Control Boards
Carrier Replacement Boards
ICM291
Carrier OEM Replacement Control
The ICM291 control is low-cost form, fit and functional replacement board for Carrier: LH33WP003A circuit boards. It controls inducer fan motor, blower fan and monitors limit switches. The ICM291 has incorporated LED diagnostics to assist in troubleshooting. Fault code information can be found in the application guide. Please refer to the application guide with the furnace installation manual for future reference.- Low-cost form, fit and functional replacement for Carrier: LH33WP003A
- Direct Spark Ignition (DSI) control board
- Microprocessor-based
- Controls combustion, blower and indoor fan motors; spark ignitor; and the 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
Input:
- Control Voltage: 24 VAC (18-30 VAC), 60 Hz
- Line Voltage: 208/230 VAC, 60 Hz
Timing:
- Pre-Purge: 45 seconds
- Trial for Ignition: 5+2 seconds
- Retry Period: Every 20 seconds for 15 minutes
- Lockout: Manual reset
- Post-Purge: 45 seconds
LED Indicators:
- Red LED:
- Steady ON – Normal operation
- Flashing – fault codes
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
Weight/Dimensions
- Weight: 0.5
- Height: 1.875″
- Width: 7″
- Length: 5″
Carrier: LH33WP003, LH33WP003A
ICP: 1171166