🔥Furnace

E05

Trane · S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace

Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace E05 Error Fix: Flame Sensor Failure

The flame sensor is not detecting the burner flame, which may cause the furnace to shut down as a safety feature to prevent gas buildup. This can be due to a dirty or faulty flame sensor.

High severity2 fixes available

Quick Answer

Error E05 on the Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace means: Flame Sensor Failure. The top-ranked community fix is “Replace Flame Sensor Assembly” (medium difficulty, ~30 min, DIY cost: $40-$60). 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.

Root Cause Analysis

Sensor MalfunctionPrimary

When to Call a Professional

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

This is a high severity error — continued use may cause damage or a safety hazard
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: $130-$210.

Other Trane Models with Error E05

XR13 13 SEER Central Air Conditioner

air_conditioner · 2 fixes

Other Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace Error Codes

E01

Pressure Switch Failure

Ignition Failure

High Limit Switch Open

2 fixes

E04

Inducer Motor Failure

2 fixes

E06

Blower Motor Overload

Limit Switch Shorted

Control Board Communication Error

2 fixes

E09

Flame Rollout Detected

2 fixes

People Also Ask About Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace Error E05

What does error code E05 mean on a Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace?

Error code E05 on the Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace means: Flame Sensor Failure. The flame sensor is not detecting the burner flame, which may cause the furnace to shut down as a safety feature to prevent gas buildup. This can be due to a dirty or faulty flame sensor.

How do I fix error code E05 on my Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace?

The most successful fix is "Replace Flame Sensor Assembly" (medium difficulty, ~30 minutes). Estimated DIY cost: $40-$60. HomeMD has 2 community-ranked fixes for this error.

Is error code E05 on a Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace error E05 myself?

Yes — the top-ranked community fix ("Replace Flame Sensor Assembly") is rated medium difficulty and takes about 30 minutes. Tools needed: Phillips screwdriver, Nut driver.

How much does it cost to repair Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace error E05?

DIY cost: $40-$60. Professional repair typically costs $130-$210. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace have?

The Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace has 8 other known error codes, including: E01 (Pressure Switch Failure), E02 (Ignition Failure), E03 (High Limit Switch Open), E04 (Inducer Motor Failure), E06 (Blower Motor Overload), and 3 more.

Which other Trane models have the E05 error?

Error code E05 also appears on 1 other Trane model: XR13 13 SEER Central Air Conditioner. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace have?

The Trane S9V2B080U4 80,000 BTU 96% AFUE Two-Stage Variable Speed Gas Furnace has 8 other known error codes:

E01 — Pressure Switch Failure (2 fixes)
E02 — Ignition Failure (2 fixes)
E03 — High Limit Switch Open (2 fixes)
E04 — Inducer Motor Failure (2 fixes)
E06 — Blower Motor Overload (2 fixes)
E07 — Limit Switch Shorted (2 fixes)
E08 — Control Board Communication Error (2 fixes)
E09 — Flame Rollout Detected (2 fixes)

Which other Trane models have the E05 error?

Error code E05 also appears on 1 other Trane model:

XR13 13 SEER Central Air Conditioner (air conditioner) · 2 fixes

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