ICM Controls ICM275 Control Board

The ICM Controls ICM275 is a high-performance fan blower control board designed for direct, form-fit-functional replacement of Carrier furnace control centers. This microprocessor-based board is essential for managing fan timing in heat pumps, air conditioning units, and forced-air configurations. It features a sophisticated dual-function fan delay timer that optimizes system efficiency; the OFF delay ensures a thorough post-purge of residual air from the ductwork, while the ON delay allows heat exchanger temperatures to stabilize before the blower engages. Operating on a standard 18-30VAC input, the ICM275 handles heavy-duty loads with a 20A @ 240VAC rating on high speed and 10A on low. It also incorporates an automotive-style 3-amp fuse to protect the low-voltage circuit and transformer from shorts. For technicians performing retrofits, this board offers a manual adjustable heat-off delay (60-240 seconds) and an integrated short-cycle protection logic to increase component longevity.

Key Benefits

• Broad Compatibility: Direct replacement for Carrier/BDP parts including HH84AA021, HH84AA001, CES11019, and Robertshaw 695-101.
• Advanced Logic: Microprocessor control manages blower speed and dual-function timing for improved occupant comfort and energy savings.
• Built-in Protection: Features an accessible 3-amp fuse and short-cycle protection to shield the system from electrical faults.
• Installer Friendly: Direct wire-for-wire replacement requires no sheet metal modifications or specialized adapters.

Common Questions

How do I adjust the fan off delay on this board?
The ICM275 features a pot or jumper setting that allows you to manually adjust the furnace fan off delay between 60 and 240 seconds to ensure the heat exchanger is fully cooled.

What does it mean if the 3-amp fuse on the board keeps blowing?
A blown fuse typically indicates a 24V short in the thermostat wiring or a faulty contactor coil. The fuse protects the transformer from permanent damage during these events.

Can I use this board for a multi-speed blower motor?
Yes, the board includes dedicated terminals for high and low speed blower operations, automatically switching speeds based on the call for heat or cool.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.