Control boards and system controls are the brain of any HVAC system — managing staging, safeties, communication between components, and fault diagnostics. When a control board fails, the entire system can shut down or behave erratically, making fast access to the right replacement board critical. Cedars HVAC Supply stocks HVAC control boards for a range of residential, commercial, and geothermal systems.
What HVAC Control Boards Do
A control board receives signals from the thermostat and system sensors, then sequences the system’s components — inducer motor, igniter, gas valve, blower, and safeties — in the correct order and timing. In more advanced systems, control boards also manage variable-speed motor communication, fault logging, and system diagnostics. A failed board can manifest as no-heat, no-cool, short-cycling, or a system that simply won’t respond to thermostat calls.
Brands and Models We Carry
Our control board inventory includes units from leading manufacturers:
- Climatemaster — Including CXM and DXM control boards for geothermal and water-source heat pump systems. These are critical boards for Climatemaster equipment and are often difficult to source quickly through other channels.
- White Rodgers — Universal and OEM-specific control boards for gas furnaces and air handlers.
- Additional boards for brands including Carrier, Trane, and compatible OEM replacements across multiple system types.
When to Replace a Control Board
Common indicators that a control board needs replacement include:
- Visible burn marks, scorched traces, or swollen capacitors on the board
- System lockout with fault codes pointing to control board failure
- Intermittent operation that doesn’t trace to a sensor or mechanical issue
- Failed relay contacts on the board confirmed by continuity testing
Always document the board’s model number, system model, and any fault codes before ordering a replacement. Many boards are system-specific and must match the original configuration.
Shop HVAC control boards at Cedars HVAC Supply — free shipping on orders over $99. Questions? Call (305) 850-6693 or visit our contractor pricing page.
