Lennox 23X17 Control Board
The Lennox 23X17 Control Board, also identified as the Lennox 620244-02, is an essential demand defrost control designed for high-performance heat pump systems. Built to replace previous iterations such as the LEN620244-02, this board integrates multiple critical functions into a single 24V module, including demand defrost logic, a defrost relay, and an anti-short cycle timed-off control. It features a sophisticated pressure switch/system lockout circuit with a 5-strike safety protocol to protect the compressor from extreme operating conditions.
Operating with thermostat commands and inputs from coil and ambient sensors, the Lennox 23X17 optimizes efficiency by initiating defrost cycles only when necessary, preventing power-wasting timed intervals. Technicians can utilize the selectable 30-second compressor delay at the beginning and end of cycles to reduce system stress. The board is shipped with a jumper in the delay position and includes a comprehensive field connection terminal strip. This OEM Lennox replacement board ensures proper communication between the reversing valve, outdoor fan, and compressor to maintain peak heating capacity in freezing conditions.
Key Benefits
- Demand Defrost Logic: Reduces unnecessary cycles by monitoring coil and ambient temperature sensors, improving overall system SEER/HSPF ratings.
- Integrated Safety Circuit: Features a 5-strike lockout for high/low pressure switches, preventing compressor failure during refrigerant flow issues.
- Configurable Timing: Includes a selectable compressor delay and a factory-installed jumper for field-adjustable defrost cycle intervals.
- Universal Diagnostics: Onboard LED indicators simplify troubleshooting by identifying sensor faults, pressure cutouts, or communication errors.
- OEM Compatibility: Validated for direct replacement in Lennox heat pump units, ensuring terminal-to-terminal alignment for fast field installation.
Common Questions
How do I troubleshoot a 5-strike lockout on this board?
A 5-strike lockout typically indicates a persistent pressure issue. Check for a blocked orifice, failing outdoor fan motor, or low refrigerant charge. Reset the board by cycling 24V power, but ensure you verify sensor resistance values to rule out a faulty Lennox thermistor first.
Can I force a manual defrost for testing?
Yes, technicians can use the "Speed Up" pins to bypass the internal timer and force a manual test of the defrost relay and reversing valve. Always remove the jumper immediately after the sequence begins to return the board to normal demand defrost operation.
Why is my outdoor fan not stopping during defrost?
If the outdoor fan continues to run while the system is in defrost mode, the integrated defrost relay on the 23X17 board may be stuck, or there is an incorrect wiring configuration at the fan terminal. Verify 24V signals at the W and O terminals to ensure the logic is correctly switching modes.
This item is not eligible for free shipping.
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.
Original: $152.62
-65%$152.62
$53.42Lennox 23X17 Control Board
The Lennox 23X17 Control Board, also identified as the Lennox 620244-02, is an essential demand defrost control designed for high-performance heat pump systems. Built to replace previous iterations such as the LEN620244-02, this board integrates multiple critical functions into a single 24V module, including demand defrost logic, a defrost relay, and an anti-short cycle timed-off control. It features a sophisticated pressure switch/system lockout circuit with a 5-strike safety protocol to protect the compressor from extreme operating conditions.
Operating with thermostat commands and inputs from coil and ambient sensors, the Lennox 23X17 optimizes efficiency by initiating defrost cycles only when necessary, preventing power-wasting timed intervals. Technicians can utilize the selectable 30-second compressor delay at the beginning and end of cycles to reduce system stress. The board is shipped with a jumper in the delay position and includes a comprehensive field connection terminal strip. This OEM Lennox replacement board ensures proper communication between the reversing valve, outdoor fan, and compressor to maintain peak heating capacity in freezing conditions.
Key Benefits
- Demand Defrost Logic: Reduces unnecessary cycles by monitoring coil and ambient temperature sensors, improving overall system SEER/HSPF ratings.
- Integrated Safety Circuit: Features a 5-strike lockout for high/low pressure switches, preventing compressor failure during refrigerant flow issues.
- Configurable Timing: Includes a selectable compressor delay and a factory-installed jumper for field-adjustable defrost cycle intervals.
- Universal Diagnostics: Onboard LED indicators simplify troubleshooting by identifying sensor faults, pressure cutouts, or communication errors.
- OEM Compatibility: Validated for direct replacement in Lennox heat pump units, ensuring terminal-to-terminal alignment for fast field installation.
Common Questions
How do I troubleshoot a 5-strike lockout on this board?
A 5-strike lockout typically indicates a persistent pressure issue. Check for a blocked orifice, failing outdoor fan motor, or low refrigerant charge. Reset the board by cycling 24V power, but ensure you verify sensor resistance values to rule out a faulty Lennox thermistor first.
Can I force a manual defrost for testing?
Yes, technicians can use the "Speed Up" pins to bypass the internal timer and force a manual test of the defrost relay and reversing valve. Always remove the jumper immediately after the sequence begins to return the board to normal demand defrost operation.
Why is my outdoor fan not stopping during defrost?
If the outdoor fan continues to run while the system is in defrost mode, the integrated defrost relay on the 23X17 board may be stuck, or there is an incorrect wiring configuration at the fan terminal. Verify 24V signals at the W and O terminals to ensure the logic is correctly switching modes.
This item is not eligible for free shipping.
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.
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Description
The Lennox 23X17 Control Board, also identified as the Lennox 620244-02, is an essential demand defrost control designed for high-performance heat pump systems. Built to replace previous iterations such as the LEN620244-02, this board integrates multiple critical functions into a single 24V module, including demand defrost logic, a defrost relay, and an anti-short cycle timed-off control. It features a sophisticated pressure switch/system lockout circuit with a 5-strike safety protocol to protect the compressor from extreme operating conditions.
Operating with thermostat commands and inputs from coil and ambient sensors, the Lennox 23X17 optimizes efficiency by initiating defrost cycles only when necessary, preventing power-wasting timed intervals. Technicians can utilize the selectable 30-second compressor delay at the beginning and end of cycles to reduce system stress. The board is shipped with a jumper in the delay position and includes a comprehensive field connection terminal strip. This OEM Lennox replacement board ensures proper communication between the reversing valve, outdoor fan, and compressor to maintain peak heating capacity in freezing conditions.
Key Benefits
- Demand Defrost Logic: Reduces unnecessary cycles by monitoring coil and ambient temperature sensors, improving overall system SEER/HSPF ratings.
- Integrated Safety Circuit: Features a 5-strike lockout for high/low pressure switches, preventing compressor failure during refrigerant flow issues.
- Configurable Timing: Includes a selectable compressor delay and a factory-installed jumper for field-adjustable defrost cycle intervals.
- Universal Diagnostics: Onboard LED indicators simplify troubleshooting by identifying sensor faults, pressure cutouts, or communication errors.
- OEM Compatibility: Validated for direct replacement in Lennox heat pump units, ensuring terminal-to-terminal alignment for fast field installation.
Common Questions
How do I troubleshoot a 5-strike lockout on this board?
A 5-strike lockout typically indicates a persistent pressure issue. Check for a blocked orifice, failing outdoor fan motor, or low refrigerant charge. Reset the board by cycling 24V power, but ensure you verify sensor resistance values to rule out a faulty Lennox thermistor first.
Can I force a manual defrost for testing?
Yes, technicians can use the "Speed Up" pins to bypass the internal timer and force a manual test of the defrost relay and reversing valve. Always remove the jumper immediately after the sequence begins to return the board to normal demand defrost operation.
Why is my outdoor fan not stopping during defrost?
If the outdoor fan continues to run while the system is in defrost mode, the integrated defrost relay on the 23X17 board may be stuck, or there is an incorrect wiring configuration at the fan terminal. Verify 24V signals at the W and O terminals to ensure the logic is correctly switching modes.
This item is not eligible for free shipping.
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.
