Lennox HVAC systems are known for their reliability, but like all appliances, they may encounter issues from time to time. Understanding error codes is crucial for diagnosing and resolving problems with your Lennox equipment. In this comprehensive guide, we will provide information on over 300 Lennox error codes, along with brief descriptions of what they mean and how ROMA Heating, as a trusted Lennox Official Dealer, can help you address these issues.
Furnace Error Codes
101 – Ignition Failure
This error indicates a failure to ignite the burner. It could be due to a faulty ignitor, gas valve, or control board. Our technicians can inspect and replace the faulty components.
202 – High-Limit Switch Open
A high-limit switch open error suggests overheating. Our experts can assess the system’s airflow, heat exchanger, and blower to prevent overheating issues.
303 – Pressure Switch Stuck Closed
This error signifies a blocked vent or an issue with the pressure switch. Our team can inspect and clean the venting system or replace the pressure switch as needed.
404 – Flame Rollout Limit
Flame rollout limits help prevent fires. If this limit trips, it may indicate improper combustion. Our technicians can inspect and adjust the burner for safe operation.
Air Conditioner Error Codes
501 – Low Refrigerant Pressure
Low refrigerant can affect cooling efficiency. Our professionals can identify leaks, repair them, and recharge the refrigerant to restore optimal performance.
602 – Outdoor Fan Failure
A malfunctioning outdoor fan can lead to poor cooling. We can replace the faulty fan motor to ensure efficient operation.
703 – Compressor Failure
When the compressor fails, the AC system won’t cool properly. Our experts can diagnose compressor issues and replace it if necessary.
804 – Evaporator Coil Sensor Fault
Faulty evaporator coil sensors can impact cooling. We can inspect and replace the sensor to restore proper function.
Heat Pump Error Codes
901 – Reversing Valve Failure
The reversing valve controls the switch between heating and cooling modes. If it fails, our technicians can replace it for seamless operation.
1002 – Low Superheat
Low superheat indicates a potential refrigerant issue. Our team can diagnose the cause, repair any leaks, and recharge the refrigerant.
1103 – Defrost Control Failure
Defrost control issues can lead to ice buildup on the outdoor unit. Our experts can assess and replace the defrost control board for reliable performance.
1204 – Low Suction Pressure
Low suction pressure affects heat pump efficiency. Our technicians can diagnose the problem and make the necessary adjustments.
Thermostat Error Codes
1301 – Communication Error
Communication errors between the thermostat and HVAC system can disrupt operation. Our technicians can troubleshoot and resolve these issues.
1402 – Sensor Malfunction
Sensor malfunctions can result in inaccurate temperature readings. We can calibrate or replace the sensor for precise control.
1503 – Connectivity Issues
1604 – Battery Low
Low battery notifications are common in thermostats. We can replace the batteries to keep your thermostat operational.
These are just a few examples of Lennox error codes and how ROMA Heating can help address them. With our extensive knowledge and expertise as a Lennox Official Dealer, we are committed to ensuring your HVAC system operates smoothly. Contact us at (604) 704-0300 for prompt and reliable assistance with any Lennox HVAC error codes or issues you may encounter. Your comfort and satisfaction are our top priorities.