ICM Controls ICM291 Furnace Control Module

The ICM291 Furnace Control Module is a microprocessor-based, direct spark control unit designed for natural gas and propane furnaces. The ICM291 provides reliable ignition sequencing and fault indication, built for residential and light commercial use.

Key capabilities include flame sense via single or dual rods, ignition sequence retry, and a controlled ignition trial time of 7 seconds with a 45-second prepurge. The module operates on 24 Volt AC (18–30 V) for control and 208/230 Volt AC for line power, with a compact footprint of 5 inch x 7 inch x 1.875 inch and a wide operating range from -40 to 176 °F.

• Microprocessor-based, Direct Spark ignition control for dependable startup
• Fuel compatibility: Natural gas and liquid propane gas
• Flame sense: Single or dual rod input for accurate flame monitoring
• Safety and timing: Ignition sequence retry, 7-second ignition trial, 45-second prepurge
• Power and compatibility: 24V AC control and 208/230V AC line; compact 5 inch x 7 inch x 1.875 inch
• Certifications: UL and CSA approvals

Indicator: Red LED shows steady-on for normal operation and flashing for fault codes, ensuring quick diagnostics and easy service.