ICM Controls

ICM Controls is a manufacturer of electronic controls and power-protection devices for HVAC, refrigeration, and related building systems industries. Founded in 1984, ICM Controls has served the HVAC/R controls marketplace for over 40 years through OEM and aftermarket distribution channels. ICM Controls operates vertically integrated manufacturing facilities in the United States and holds ISO certification for its production processes. The company's product portfolio spans furnace control boards, defrost controls, ignition modules, motor starters, line voltage monitors, surge protection devices, and A2L refrigerant detection systems. ICM Controls products are designed to serve residential HVAC, commercial refrigeration, RV, pool and spa, and marine applications. For HVAC technicians and service contractors, ICM Controls provides a single-source control and protection solution that covers diagnostics, replacement, and protection across the full range of HVAC/R electrical system needs.

Product Lines

Furnace Control Boards

ICM Controls furnace control boards are universal and OEM-replacement circuit boards designed to restore furnace operation in residential and commercial heating systems when the original board has failed. ICM Controls control boards are engineered to interface with standard furnace burner, blower, and ignition circuits, and are available in universal configurations that cover multiple furnace brands with a single replacement board. The ICM Controls furnace control board product line includes boards with adjustable timing and jumper-configurable blower delay settings that allow technicians to match the replacement board's behavior to the original equipment specifications. Contractors who stock ICM Controls universal boards can reduce their inventory requirements compared to stocking OEM-specific boards for each equipment brand they service.

Ignition Control Modules

ICM Controls ignition control modules provide electronic spark and hot-surface ignition management for gas furnaces, boilers, and residential heating appliances. ICM Controls offers ignition modules in both universal and OEM-equivalent configurations, covering standard intermittent pilot, direct-spark ignition, and hot-surface ignition applications. The ICM870 series is a soft-start ignition module that includes built-in start capacitor functionality, over-voltage and under-voltage monitoring, and over-current protection in a single device. Service technicians replacing ignition controls with ICM Controls modules benefit from the company's cross-reference tools that identify compatible ICM Controls replacements for OEM ignition module part numbers across major furnace brands.

Line Voltage Monitors and Surge Protection Devices

ICM Controls line voltage monitors detect over-voltage, under-voltage, and power quality events that can damage HVAC compressors, motors, and controls, automatically disconnecting and reconnecting equipment based on configurable voltage thresholds. ICM Controls surge protection devices guard connected HVAC equipment from transient voltage spikes associated with lightning, switching events, and utility disturbances. The SENTRY series combines disconnect functionality with internal voltage monitoring and surge protection in a single device for air conditioning and refrigeration equipment. For contractors in regions with unreliable power quality or frequent lightning exposure, ICM Controls voltage protection products can reduce compressor and control failures caused by power events.

A2L Refrigerant Detection Systems

ICM Controls A2L refrigerant detection systems monitor enclosed spaces for flammable A2L refrigerant accumulation, providing the code-required gas detection capability for equipment using low-GWP A2L refrigerants such as R-32 and R-454B. A2L detection is required by code in certain installation scenarios for equipment using mildly flammable refrigerants, and ICM Controls offers detection solutions designed for the specific concentration levels and response times that current standards require. The ICM Controls A2L product line supports both residential and light-commercial A2L refrigerant installations. As the HVAC industry transitions to A2L refrigerants, ICM Controls positions A2L detection as an integrated part of the control and safety package, not a separate add-on requirement.

Why Contractors Specify ICM Controls

ICM Controls has held ISO certification and operated vertically integrated US manufacturing since its founding in 1984, providing over 40 years of documented quality control in electronic control and protection device production. The company's cross-reference tools and universal-board product strategy reduce the number of SKUs a service department needs to maintain while covering a broad range of equipment brands. ICM Controls serves multiple industry sectors beyond HVAC, including RV, pool and spa, and marine, which drives investment in control reliability across diverse operating environments. The SENTRY series and A2L refrigerant detection products reflect ICM Controls' response to current code and technology transitions affecting the HVAC industry, allowing contractors to source protection and detection from an established US manufacturer rather than sourcing from multiple specialty suppliers.

How to Choose a ICM Controls Product

The most important decision variable when selecting an ICM Controls product is the specific function required: furnace control, ignition management, voltage protection, motor starting, or refrigerant detection. ICM Controls segments its product line by function, and matching the correct category to the application is the first step.

For furnace control board replacement, the key specifications are the OEM board's model number or furnace model number, the number and type of blower delay timing stages required, and whether the replacement needs to be OEM-equivalent or if a universal configuration will work with the equipment's wiring. ICM Controls universal boards reduce stocking requirements but may require jumper configuration at installation.

For ignition module replacement, the input voltage, spark type (intermittent pilot, direct spark, or hot surface), and lockout timing are the critical specifications. The ICM Controls cross-reference tool maps OEM ignition module part numbers to ICM Controls equivalents, and the ICM870 series adds soft-start and voltage monitoring capability compared to basic OEM ignition replacements.

For voltage protection, which ICM Controls line voltage monitor or surge protection device is right for the application depends on the voltage range of the connected equipment (120V, 240V, or three-phase), the required trip voltage thresholds, and whether the application requires manual or automatic restart after a voltage event. ICM Controls publishes specification sheets for each protection device on icmcontrols.com.

For A2L refrigerant detection, the installation scenario and local code requirements determine which ICM Controls detection system is appropriate. Contractors should confirm local jurisdiction requirements for A2L detection before specifying a system.

FAQs

Where are ICM Controls products manufactured?

ICM Controls products are manufactured in the United States. The company has operated vertically integrated US manufacturing facilities since its founding in 1984 and holds ISO certification for its production processes.

What warranty does ICM Controls offer on its electronic controls?

ICM Controls warranty terms are available on icmcontrols.com. Contractors should request current warranty documentation for the specific ICM Controls product being specified, as terms may vary by product line.

What is the difference between ICM Controls furnace control boards and ignition modules?

The difference between ICM Controls furnace control boards and ignition modules is the scope of function. Furnace control boards manage the full sequence of furnace operation, including inducer motor timing, gas valve staging, blower delays, and safety circuit monitoring. Ignition modules manage only the ignition sequence, providing the spark or hot-surface signal and monitoring for successful flame establishment. A furnace may use both an ICM Controls control board and a separate ignition module depending on the equipment design.

What size ICM Controls line voltage monitor is right for a residential application?

The right ICM Controls line voltage monitor for a residential application depends on the equipment's power supply voltage (typically 120V or 240V single-phase for residential HVAC) and the required trip thresholds for over-voltage and under-voltage events. ICM Controls publishes specification sheets for each voltage monitor model on icmcontrols.com, which include the voltage range, trip thresholds, and restart delay settings for each device.

Are ICM Controls products compatible with multiple HVAC equipment brands?

ICM Controls universal control boards and ignition modules may be compatible with multiple HVAC equipment brands when the functional specifications match the original equipment's requirements. ICM Controls provides cross-reference data mapping OEM part numbers to ICM Controls equivalents, which contractors should consult before specifying a universal replacement to confirm compatibility.

What is the difference between ICM Controls voltage monitors and surge protection devices?

The difference between ICM Controls line voltage monitors and surge protection devices is the threat type they address. Line voltage monitors detect sustained over-voltage and under-voltage conditions and disconnect equipment until power quality returns to acceptable levels. Surge protection devices absorb or divert transient voltage spikes from lightning, switching events, or utility disturbances. The SENTRY series from ICM Controls combines both voltage monitoring and surge protection in a single device for applications where both threat types are present.