Brand: LENNOX
Category: HVAC
Document Type:
Language: EN
Manual for A96UH2E & 96G2UHE - Troubleshooting and error codes + PDF Download
Uploaded: March 30, 2025, 4:25 p.m.
Warranty Summary
None
Start-Up Summary:
- Safety First: Read all safety warnings before operating.
- Smell for Gas: Check for gas leaks around the furnace area, especially near the floor.
- Gas Valve Operation: Ensure you understand how to operate the gas control switch lever by hand only, without tools.
- Automatic Ignition: This furnace uses automatic hot surface ignition. Do not manually light burners.
- Thermostat Setting: Set the thermostat to the lowest setting initially.
- Power On: Turn on electrical power to the unit.
- Gas Valve Switch: Turn the gas valve switch to the ON position after waiting five minutes for gas to clear if smelled previously.
- Set Thermostat: Set the thermostat to the desired temperature.
Troubleshooting and error codes
Failure to Operate Checklist:
| Problem | Possible Cause |
|---|---|
| Unit fails to operate | Is the thermostat calling for heat? |
| Unit fails to operate | Are access panels securely in place? |
| Unit fails to operate | Is the main disconnect switch closed? |
| Unit fails to operate | Is there a blown fuse or tripped breaker? |
| Unit fails to operate | Is the filter dirty or plugged? |
| Unit fails to operate | Is gas turned on at the meter? |
| Unit fails to operate | Is the manual main shut-off valve open? |
| Unit fails to operate | Is the internal manual shut-off valve open? |
| Unit fails to operate | Is the unit ignition system in lockout? |