York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace BF Error Fix: Blower Fault

The blower motor has failed to start or is running outside normal parameters. This fault can cause overheating and furnace shutdown due to lack of airflow.

High severity2 fixes available

Quick Answer

Error BF on the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Blower Fault. The top-ranked community fix is “Replace Blower Motor” (hard difficulty, ~90 min, DIY cost: $180-$250). 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

Motor FailurePrimary

Mechanical Wear

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: $300-$450.

Other York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace Error Codes

Burner Blocked

2 fixes

Control Board Failure

2 fixes

CF1

Circulation Fan Fault

2 fixes

Exhaust Blockage

2 fixes

Flame Detection Failure

Filter Fault

Flame Lockout

Flame Sensor Shorted

People Also Ask About York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace Error BF

What does error code BF mean on a York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace?

Error code BF on the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Blower Fault. The blower motor has failed to start or is running outside normal parameters. This fault can cause overheating and furnace shutdown due to lack of airflow.

How do I fix error code BF on my York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace?

The most successful fix is "Replace Blower Motor" (hard difficulty, ~90 minutes). Estimated DIY cost: $180-$250. HomeMD has 2 community-ranked fixes for this error.

Is error code BF on a York TM9V100C20MP11 100,000 BTU 96% AFUE 2-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 York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace error BF myself?

Yes — the top-ranked community fix ("Replace Blower Motor") is rated hard difficulty and takes about 90 minutes. Tools needed: Phillips screwdriver, Nut driver, Multimeter.

How much does it cost to repair York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace error BF?

DIY cost: $180-$250. Professional repair typically costs $300-$450. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace have?

The York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace has 8 other known error codes, including: BB (Burner Blocked), CF (Control Board Failure), CF1 (Circulation Fan Fault), EB (Exhaust Blockage), FD (Flame Detection Failure), and 3 more.

What other error codes does the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace have?

The York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace has 8 other known error codes:

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