The Lennox furnace manual pilot lighting procedure is essential for gas furnace models with standing pilot lights. This guide covers safety precautions, step-by-step lighting instructions, troubleshooting common issues, and maintenance tips for Lennox furnace pilot lights. Always refer to your specific model's manual and exercise extreme caution when working with gas appliances.
Before attempting to light the pilot, ensure you follow these critical safety measures:
| Safety Measure | Description |
|---|---|
| Gas smell detection | If you smell gas, do not light pilot - evacuate and call gas company |
| Ventilation | Ensure adequate ventilation in furnace area |
| Clearance | Keep flammable materials away from furnace |
| Proper tools | Use long fireplace matches or extended lighter |
| Gas valve location | Know where main gas shutoff valve is located |
| Carbon monoxide | Ensure CO detectors are functioning properly |
Complete these steps before lighting the pilot:
WARNING! Never attempt to light pilot if you smell gas. Leave area immediately and call your gas provider.
Follow these instructions carefully to light your Lennox furnace pilot:
CAUTION! If pilot won't stay lit after multiple attempts, wait 10 minutes and try again. If problem persists, call for service.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pilot won't light | Gas supply off or thermocouple issue | Check gas valve; ensure thermocouple is properly positioned in flame |
| Pilot lights but won't stay lit | Dirty thermocouple or draft | Clean thermocouple with emery cloth; check for drafts |
| Weak or yellow pilot flame | Clogged pilot orifice | Clean pilot assembly; adjust air shutter if available |
| Gas smell but no pilot | Gas leak or improper lighting | Turn off gas immediately and call professional |
| Pilot out frequently | Drafty conditions or thermocouple failing | Check ventilation; replace thermocouple if needed |
Regular maintenance ensures reliable pilot operation:
Tip: Keep area around furnace clean and free of dust/debris
Contact a qualified HVAC technician if you experience:
WARNING! Never attempt to repair gas valves or major components yourself - always use licensed professionals.
| Question | Answer |
|---|---|
| How long should I hold the pilot button? | Typically 30-60 seconds to allow thermocouple to heat up |
| What color should the pilot flame be? | Mostly blue with small yellow tip - all yellow indicates problem |
| Can I relight pilot if it goes out? | Yes, but wait 5-10 minutes for gas to dissipate first |
| How often does thermocouple need replacement? | Every 2-5 years depending on usage and maintenance |
| Is it safe to light pilot myself? | Yes, if you follow all safety procedures and feel comfortable |
Emergency: If you suspect gas leak, leave area immediately and call 911 or gas company from safe location.