Lennox SLP98UHV Furnace Error Codes

Modulating Gas Furnace | Control Board: SureLight Variable Capacity Integrated Control

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Disclaimer
This information is for reference purposes only and does not guarantee accuracy or completeness. Always consult your owner's manual and a licensed HVAC technician for diagnosis and repair. Any actions taken based on this information are at your own risk.

All Error Codes

Code Name Severity DIY?
. Idle Mode Info — →
A Indoor Blower CFM Setting Info — →
C Cooling Stage Display Info — →
d Dehumidification Mode Info — →
h Variable Capacity Heat Display Info — →
H Heat Stage Display Info — →
df Defrost Mode Info — →
U Discharge Air Temperature Info — →
Two horizontal bars Soft Disable Low ✗ Call a pro →
E 105 Device Communication Problem Low ✗ Call a pro →
E 110 Low Line Voltage High ✗ Call a pro →
E 113 High Line Voltage High ✗ Call a pro →
E 114 Line Voltage Frequency Out-of-Range High ✗ Call a pro →
E 115 Low 24V High ✗ Call a pro →
E 120 Unresponsive Device Low ✗ Call a pro →
E 124 Thermostat Signal Missing High ✓ Yes →
E 125 Control Self-Check Failed High ✗ Call a pro →
E 126 Internal Control Communication Failure High ✗ Call a pro →
E 131 Corrupted Control Parameters High ✗ Call a pro →
E 180 Outdoor Air Sensor Failure Low ✗ Call a pro →
E 200 Hard Lockout - Rollout Circuit Open High ✗ Call a pro →
E 201 Indoor Blower Communication Failure High ✗ Call a pro →
E 202 Indoor Blower Motor Mis-Match Low ✗ Call a pro →
E 203 Appliance Capacity Not Programmed High ✗ Call a pro →
E 204 Gas Valve Mis-Wired High ✗ Call a pro →
E 205 Gas Valve Relay Contact Shorted High ✗ Call a pro →
E 207 Hot Surface Ignitor Sensed Open High ✗ Call a pro →
E 223 Low Pressure Switch Failed Open High ✗ Call a pro →
E 224 Low Pressure Switch Failed Closed High ✗ Call a pro →
E 225 High Pressure Switch Failed Open High ✗ Call a pro →
E 226 High Pressure Switch Failed Closed High ✗ Call a pro →
E 227 Low Pressure Switch Open During Run High ✗ Call a pro →
E 228 Pressure Switch Calibration Failed High ✗ Call a pro →
E 240 Low Flame Current High ✗ Call a pro →
E 241 Flame Sensed Out of Sequence High ✗ Call a pro →
E 250 Limit Switch Circuit Open High ✓ Yes →
E 252 Discharge Air Temperature Too High High ✓ Yes →
E 270 Soft Lockout - No Flame Sensed High ✗ Call a pro →
E 271 Soft Lockout - Pressure Switch Opening High ✗ Call a pro →
E 272 Soft Lockout - Pressure Switch Recycle High ✗ Call a pro →
E 273 Soft Lockout - Flame Failure High ✗ Call a pro →
E 274 Soft Lockout - Limit Circuit High ✓ Yes →
E 275 Soft Lockout - Flame Out of Sequence High ✗ Call a pro →
E 276 Soft Lockout - Calibration Retries Exceeded High ✗ Call a pro →
E 290 Ignitor Circuit Fault High ✗ Call a pro →
E 291 Restricted Air Flow High ✓ Yes →
E 292 Indoor Blower Motor Unable to Start High ✗ Call a pro →
E 294 Combustion Air Inducer Motor High Amp Draw High ✗ Call a pro →
E 295 Indoor Blower Motor Over Temperature High ✗ Call a pro →
E 310 Discharge Sensor Failure Low ✗ Call a pro →
E 311 Heat Rate Reduced - Cutback Mode Low ✓ Yes →
E 312 Restricted Airflow - Cooling/Fan Mode Low ✓ Yes →
E 313 Indoor or Outdoor Unit Capacity Mismatch Info — →
E 331 Communication Link Problem Low ✗ Call a pro →
E 347 No 24V Output Y1 to C High ✗ Call a pro →
E 348 No 24V Output Y2 to C High ✗ Call a pro →
E 349 No 24V Between R and O High ✗ Call a pro →
E 401 LSOM - Compressor Ran Over 18 Hours High ✗ Call a pro →
E 402 LSOM - Outdoor Unit Pressure Trip High ✗ Call a pro →
E 403 LSOM - Compressor Short-Cycling High ✓ Yes →
E 404 LSOM - Compressor Rotor Locked High ✗ Call a pro →
E 405 LSOM - Compressor Open Circuit High ✗ Call a pro →
E 406 LSOM - Compressor Open Start Circuit High ✗ Call a pro →
E 407 LSOM - Compressor Open Run Circuit High ✗ Call a pro →
E 408 LSOM - Compressor Contactor Welded High ✗ Call a pro →
E 409 LSOM - Compressor Low Voltage High ✗ Call a pro →

How to Read the Error Code

The SureLight Variable Capacity Integrated Control uses a 7-segment LED display to show status and error codes. Press the diagnostic push button and hold it to cycle through a menu of options. Every five seconds a new menu item will be displayed. When a solid "E" is displayed, the control enters the Error Code Recall mode. Error codes are displayed as "E" followed by a 3-digit number (e.g., E 105, E 200).

About This Model

The Lennox SLP98UHV is a modulating gas furnace using the SureLight Variable Capacity Integrated Control control board.