York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace CF Error Fix: Control Board Failure

The furnace control board detected an internal fault or communication error, causing furnace shutdown. This error indicates possible board failure or wiring issues.

critical2 fixes available

Quick Answer

Error CF on the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Control Board Failure. The top-ranked community fix is “Replace Control Board” (hard difficulty, ~60 min, DIY cost: $250-$300). 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

Control Board FailurePrimary

Electrical Fault → Wiring Harness Damaged

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: $400-$600.

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

Burner Blocked

2 fixes

Blower Fault

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 CF

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

Error code CF on the York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Control Board Failure. The furnace control board detected an internal fault or communication error, causing furnace shutdown. This error indicates possible board failure or wiring issues.

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

The most successful fix is "Replace Control Board" (hard difficulty, ~60 minutes). Estimated DIY cost: $250-$300. HomeMD has 2 community-ranked fixes for this error.

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

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Can I fix York TM9V100C20MP11 100,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace error CF myself?

Yes — the top-ranked community fix ("Replace Control Board") is rated hard difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver.

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

DIY cost: $250-$300. Professional repair typically costs $400-$600. 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), BF (Blower Fault), 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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