Lennox Error Code 7: Ignition Lockout
Warning: Your Lennox HVAC system has entered ignition lockout. It's safe, but needs professional attention.
How to Fix Lennox Code 7
- Check if your system has power. If not, reset the circuit breaker.
- Listen for any unusual noises from your furnace. If you hear any, call a professional.
- Do not attempt to open your furnace or tamper with any internal components.
How to Reset Lennox Code 7
- Turn off the furnace power switch, usually located on or near the unit.
- Turn off the circuit breaker for the furnace. Wait 30 seconds.
- Restore power at the breaker and flip the furnace switch back on.
- Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.
What does 7 mean?
Lennox error code 7, or ignition lockout, means your heating system has temporarily shut down to prevent damage. This could be due to a safety feature kicking in, or a minor issue that needs addressing. Don't worry, it's not a gas leak or fire risk, but it's best to get it checked out.
Affected Models
- SLP98V
- SLP98
- EL296V
- EL296
- SLP
- SLP
- ELP
- ELP
- NCB
- NPE
- Elite Series
- Elite Series
- Dave Lennox Signature Collection
- Dave Lennox Signature Collection
- ML195
- SLO
- EL296
- SLP98V
- EL296V
- G61
- ELP
- NCB
- NPE
- NPE
- ML195
- ML199
- Elite Series
- Dave Lennox Signature Collection
- Lennox Healthy Climate
- Elite Series
- Elite Series
- Slimline Series
- Slimline Series
- Health Saver Series
- Pace Series
Replacement Parts
| Part | OEM Number | Est. Cost |
|---|---|---|
| Igniter | 65-598325-00 | — |
| Flame Sensor | 65-598326-00 | — |
Related Codes on Same Models
| Code | Description | Severity |
|---|---|---|
| 1 | Ignition Failure | Warning |
| 2 | Pressure Switch Stuck Closed | Warning |
| 3 | Pressure Switch Stuck Open | Warning |
| 4 | High Limit Switch Open | Warning |
| 5 | Flame Rollout Switch Open | Warning |
| 6 | Pressure Switch System Lockout | Warning |
| 8 | Control Board Error | Warning |
| 9 | Line Voltage Polarity Incorrect | Warning |
| E250 | Lennox Code E250 - Indoor Blower Communication Error | Warning |