Cedars HVAC Supply stocks HVAC control boards, defrost controls, and pressure controls from Ranco, Penn, and Danfoss for residential and commercial units. 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.
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.
