🔥Furnace

6 FLASHES

Lennox · EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace

Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace 6 FLASHES Error Fix: 115 VAC Power or Ground Fault

The control board has detected reversed line voltage polarity (hot and neutral swapped) or an improper ground connection. Lennox furnace controls require correct polarity for flame sensing to work properly. The flame sense circuit uses the grounding path as a reference. Check the power supply: hot wire on the black terminal, neutral on white, and proper earth ground. Use a multimeter to verify proper polarity at the furnace junction box.

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error 6 FLASHES on the Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace means: 115 VAC Power or Ground Fault. The top-ranked community fix is “Inspect and Repair Grounding and Control Board Connections” (medium difficulty, ~45 min, DIY cost: $0-$10). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · furnace

Content is based on manufacturer service documentation, community repair experience, and OEM technical bulletins. Always verify with your owner's manual.Learn about our editorial standards.

When to Call a Professional

While many furnace repairs can be done safely at home, consider hiring a qualified technician if:

The repair involves electrical wiring, gas lines, or refrigerant
You've tried the top-ranked fix and the error persists
You smell gas, see sparking, or notice water leaking
The repair requires specialized tools you don't have
Your appliance is still under manufacturer warranty

Average professional repair cost for this issue: $120-$200.

Other Lennox Models with Error 6 FLASHES

ML196E Merit Series 96% AFUE Single-Stage Gas Furnace

furnace · 2 fixes

SL280V Dave Lennox Signature Collection 80% AFUE Variable Speed Gas Furnace

furnace · 2 fixes

SL297NV Dave Lennox Signature Collection 97% AFUE Modulating Variable Speed Gas Furnace

furnace · 2 fixes

Other Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace Error Codes

1 FLASH

No Previous Fault Code Stored

2 fixes

10 FLASHES

Blower Motor Calibration Fault

2 fixes

11 FLASHES

Auxiliary Limit Switch Open

Inducer Motor Fault

Communicating System Fault

2 fixes

2 FLASHES

System Lockout — Retries Exhausted

2 fixes

3 FLASHES

Pressure Switch Stuck Closed

2 fixes

4 FLASHES

Pressure Switch Open — Did Not Close

2 fixes

People Also Ask About Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace Error 6 FLASHES

What does error code 6 FLASHES mean on a Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace?

Error code 6 FLASHES on the Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace means: 115 VAC Power or Ground Fault. The control board has detected reversed line voltage polarity (hot and neutral swapped) or an improper ground connection. Lennox furnace controls require correct polarity for flame sensing to work properly. The flame sense circuit uses the grounding path as a reference. Check the power supply: hot wire on the black terminal, neutral on white, and proper earth ground. Use a multimeter to verify proper polarity at the furnace junction box.

How do I fix error code 6 FLASHES on my Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace?

The most successful fix is "Inspect and Repair Grounding and Control Board Connections" (medium difficulty, ~45 minutes). Estimated DIY cost: $0-$10. HomeMD has 2 community-ranked fixes for this error.

Is error code 6 FLASHES on a Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace error 6 FLASHES myself?

Yes — the top-ranked community fix ("Inspect and Repair Grounding and Control Board Connections") is rated medium difficulty and takes about 45 minutes. Tools needed: T15 Torx screwdriver, Multimeter, Wire strippers.

How much does it cost to repair Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace error 6 FLASHES?

DIY cost: $0-$10. Professional repair typically costs $120-$200. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace have?

The Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace has 8 other known error codes, including: 1 FLASH (No Previous Fault Code Stored), 10 FLASHES (Blower Motor Calibration Fault), 11 FLASHES (Auxiliary Limit Switch Open), 12 FLASHES (Inducer Motor Fault), 13 FLASHES (Communicating System Fault), and 3 more.

Which other Lennox models have the 6 FLASHES error?

Error code 6 FLASHES also appears on 3 other Lennox models: ML196E Merit Series 96% AFUE Single-Stage Gas Furnace, SL280V Dave Lennox Signature Collection 80% AFUE Variable Speed Gas Furnace, SL297NV Dave Lennox Signature Collection 97% AFUE Modulating Variable Speed Gas Furnace. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace have?

The Lennox EL296V Elite Series 96% AFUE Two-Stage Variable Speed Gas Furnace has 8 other known error codes:

1 FLASH — No Previous Fault Code Stored (2 fixes)
10 FLASHES — Blower Motor Calibration Fault (2 fixes)
11 FLASHES — Auxiliary Limit Switch Open (2 fixes)
12 FLASHES — Inducer Motor Fault (2 fixes)
13 FLASHES — Communicating System Fault (2 fixes)
2 FLASHES — System Lockout — Retries Exhausted (2 fixes)
3 FLASHES — Pressure Switch Stuck Closed (2 fixes)
4 FLASHES — Pressure Switch Open — Did Not Close (2 fixes)

Which other Lennox models have the 6 FLASHES error?

Error code 6 FLASHES also appears on 3 other Lennox models:

ML196E Merit Series 96% AFUE Single-Stage Gas Furnace (furnace) · 2 fixes
SL280V Dave Lennox Signature Collection 80% AFUE Variable Speed Gas Furnace (furnace) · 2 fixes
SL297NV Dave Lennox Signature Collection 97% AFUE Modulating Variable Speed Gas Furnace (furnace) · 2 fixes

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