ICM Controls ICM255 Fan Blower Control 24VAC Dual Delay Timer

The ICM Controls ICM255 is a dual-function fan blower control board designed to manage circulating fans in heat pump, air conditioning, and forced air HVAC systems. This reliable control features fixed time delays with a 1-second ON delay and 60-second OFF delay to optimize system performance and efficiency.

Key Features:

• Low-cost open board design with high-power relay output
• Input voltage range: 18-30 VAC (24VAC nominal)
• Output rating: 20 amps at 240 VAC (both N.O. and N.C. contacts)
• ON delay allows air to reach proper comfort level before energizing fan
• OFF delay continues running fan after heating/cooling cycle ends, purging ducts of residual air
• Replaces thermal time delays with solid-state reliability
• Features 1-second interrogation delay to prevent nuisance trips from thermostat bounce
• Board dimensions: 2.5 inches x 2.5 inches
• 1/4 inch quick connect terminals for easy installation

OEM Cross-Reference: Replaces A-1 5893, Bard 8201-056, Mars 32574, Rheem 42-22515-01/42-22515-02/42-22515-03, Snyder General/ICP 1395336, and other compatible part numbers.

This control board operates by keeping the load energized while the initiate contact is closed. When the contact opens, the time delay begins, and at the end of the delay period, the load turns off. This efficient design maximizes comfort while reducing energy waste in residential and commercial HVAC applications.