Carrier CESO110074-01 Control Board

The Carrier CESO110074-01 Control Board serves as the central processing unit for select Carrier, Bryant, and Payne mid-efficiency gas furnaces. As a genuine OEM replacement part, this board is the current factory-authorized successor to the obsolete CESO110074-00. When performing a field swap from the -00 to the CESO110074-01, technicians should note that while functional logic remains identical, minor terminal modifications may be required. Specifically, the EAC-1 and EAC-2 terminals utilize 1/4-inch quick connects, while the COM, SEC-1, and SEC-2 terminals require 3/16-inch connectors.

Engineered for precise furnace circuit board logic, this module manages the inducer motor, blower timings, and gas valve sequences. It features integrated HVAC diagnostic LED indicators to streamline troubleshooting by flashing specific fault codes for rapid system recovery. This furnace ignition control also incorporates a 100% safety lockout feature, ensuring the unit remains in a safe state if a critical flame or limit failure is detected during the heating cycle.

Key Benefits

• Direct OEM Compatibility: Engineered as the official Carrier furnace parts replacement for legacy boards like the CESO110054-00 and CESO110074-00.
• Advanced System Monitoring: Continuously regulates the inducer motor, pressure switches, and limit circuits to maintain factory-spec performance.
• On-Board Diagnostics: Rapidly identify furnace fault codes via status LEDs, reducing billable hours spent on diagnostic guesswork.
• Optimized Blower Timing: Features a fixed 45-second heat blower-on delay and selectable 120/180-second off delays for maximum heat exchanger efficiency.
• Reliable Safety Logic: Built-in 100% lockout protection provides essential system security against erratic pilot or main burner operation.

Common Questions

Is the CESO110074-01 a drop-in replacement for the -00 version?
Yes, it is the functional replacement control board, but you must check your terminal sizes. The CESO110074-01 uses different quick-connect widths for the EAC and secondary transformer leads compared to the older -00 revision.

How do I read the diagnostic codes on this board?
The status LED will flash a series of pulses corresponding to specific HVAC troubleshooting codes. Refer to the furnace service panel or the included 997-120460-1 instructions to translate these flashes into specific circuit faults.

Can this board be used in a standing pilot furnace?
Yes, though specific field wiring adjustments for the transformer and EAC connections are necessary for older standing pilot configurations to ensure proper 24V/115V isolation.

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.