#LENNOX FURNACE PARTS LOOKUP CODE#

LED 1 - slow flashing, LED 2 - fast flashing: There might be a low flame. LED 1 & 2 - alternating and quick flashing: Your furnace not having enough voltage. LED 1 & 2 - alternating and slow flashing: There is a flame failure. LED 1 - off, LED 2 - Slow flashing: Draft inducer is not operating or the pressure switch circuit has closed. LED 1 - slow flashing, LED 2 - off: A flame detected with no gas.

LED 1 - slow flashing and LED 2 - continuous: Indicates that the high limit switch is open.

#LENNOX FURNACE PARTS LOOKUP CODE#

Here is a Lennox error code list you might encounter: If two LEDs flashing together, it means the unit is running normally. Lennox furnaces are designed with two LED lights that will in various patterns to help you diagnose issues. Hence, keep the filter clean and dirt-free for running the furnace well and efficiently. A dirty filter tends to abnormal pressure on your unit. A clogged filter is one of the primary causes of your Lennox furnace problems. Too often, you have to check the air filter. If you feel too hot, indicates that it is burnt. Simply touch the inducer motor to test it. The Inducer motor is placed on the top compartment of the Lennox furnace. When the inducer motor is not working, your furnace also stops working. Inducer motor exhausts the flue gases out of your house when your furnace is running. Once the thermostat calls for heat, the inducer motor comes on to ensure that there is no restriction in the exhaust and intake vent. You will need to replace it if it is faulty.īest Pricing and High Quality Lennox Replacement Parts – Shop Now! Inducer Motor Problem Using a fine abrasive pad, clean the flame sensor if it is dirty. If the flame sensor is either defective or dirty, it won't detect the flame. The flame sensor in the furnace monitors the burner that detects whether the flame is present or not. It might because of the flame sensor problem. If there is no continuity, consider the issue with the thermostat and replace it. If so, your blower motor will run continuously.Ĭheck the continuity of the thermostat with a multimeter. Replace if necessary.Ĭheck if the contact that controls the blower motor on your thermostat could be stuck closed. However, you have to check the relay and other components in the control board. If the relay in the control board that controls the blower motor has failed, it continuously sends the voltage to the motor. The control board regulates the amount of voltage that reaches each functioning part. The problem might be with the control board. Lennox Parts for your Furnace Available to Buy! Lennox Furnace Blowing Too Much Air If the motor runs but air doesn't move, the connecting belt has probably broken.

If the motor receiving power, but is not running, then there may be a failure case with the motor. You have to test to see if power is reaching the motor. If it is not the case, then inspect the connecting belt that it has simply broken. Your blower motor could burn out completely. Issues with the blower motor caused the furnace not to blow hot air. If this test does not stabilize the furnace, you may have to replace the thermostat. If your furnace's thermostat has an adjustable calibration scale, try adjusting the heat anticipator. If the thermostat is set incorrectly, it can cause the furnace to cycle on and off too often. Verify if the problem is with the thermostat. Get OEM Lennox Furnace Parts Online PartsAPS. If it isn’t cracked, test for continuity by using a multimeter. If there are cracks, then you have to replace the igniter. The igniter may have cracks or it is faulty. Reset the breaker if it is tripped.Īlso, check the igniter. Also, try resetting the Lennox furnace’s circuit breaker and fuse. Most likely, the reason is either the electrical system providing power to your furnace has shorted or the power switch has blown. If your furnace is not heating, a circuit breaker or fuse might be the problem.

Lennox Furnace Troubleshooting GuideĬheck the Lennox furnace problems and their troubleshooting tips.

Lennox furnace parts lookup