Lennox Error Code E250: Lennox Code E250 - Indoor Blower Communication Error
How to Fix Lennox Code E250
- Step 1: Check the furnace's power switch to ensure it is in the 'ON' position.
- Step 2: Inspect the furnace filter and replace it if it's dirty. A clogged filter can sometimes cause unusual system behavior.
- Step 3: Reset the furnace by turning off the breaker that supplies power to the furnace for about 5 minutes, then turn it back on. This might clear a temporary communication glitch.
- Step 4: If the error code persists after these steps, contact a qualified HVAC technician for diagnosis and repair.
How to Reset Lennox Code E250
- 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.
Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.
What Does Lennox Error Code E250 Mean?
Lennox error code E250 indicates a communication fault between the furnace control board and the indoor blower motor. Basically, the 'brains' of your furnace can't talk to the part that blows air through your vents. This usually means the furnace has shut down as a safety measure, since it can't properly regulate temperature without the blower working. This communication issue can stem from a few different things, like wiring problems, a faulty blower motor module, or even a problem with the control board itself. Because the blower is responsible for moving heated air throughout your home, this error will prevent your furnace from producing heat until the problem is resolved.
Common Causes
- Loose or damaged wiring between the control board and the blower motor module.
- Faulty blower motor module (ECM motor failure).
- Defective furnace control board.
- Power surge or electrical interference affecting communication signals.
Diagnostic Steps
| If... | Check | Expected |
|---|---|---|
| Furnace displays E250 error | Check voltage at the blower motor connector on the control board | Typically 24VAC present during a call for heat |
| Low or no voltage at the blower connector | Inspect wiring harness between the control board and blower motor for damage or loose connections | Wiring is intact and securely connected |
| Wiring appears OK | Measure resistance across the communication terminals on the blower motor module | Specific resistance value will vary by motor model; consult the motor's technical data. |
| Communication resistance is out of range | Check the 5-pin connector on the blower motor for corrosion or damage | Connector is clean and undamaged |
Applicable Lennox Models
- Lennox Healthy Climate(dual_fuel)
- Dave Lennox Signature Collection(gas)
- EL296(electric)
- EL296V(electric)
- ELP(electric)
- Elite Series(electric)
- G61(gas)
- Health Saver Series(electric)
- ML195(dual_fuel)
- ML199(gas)
- NCB(electric)
- NPE(electric)
- Pace Series(electric)
- SLO(gas)
- SLP(electric)
- SLP98(gas)
- SLP98V(gas)
- Slimline Series(electric)
Replacement Parts
| Part | OEM Number | Est. Cost | Where to Buy |
|---|---|---|---|
| Blower Motor Module (ECM) | X13 Motor | — | Find Part |
| Furnace Control Board | — | — | — |
| Wiring Harness | — | — | — |
Related Codes on Same Models
Other codes that affect the same Lennox model families as E250.
| 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 |
| 7 | Ignition Lockout | Warning |
| 8 | Control Board Error | Warning |
| 9 | Line Voltage Polarity Incorrect | Warning |