🔥Furnace

E03

York · TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace

York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace E03 Error Fix: Pressure Switch Error

The pressure switch did not close or open as expected during the furnace startup sequence. This may be caused by blocked venting, faulty switch, or inducer motor issues, preventing proper combustion.

critical2 fixes available

Quick Answer

Error E03 on the York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Pressure Switch Error. The top-ranked community fix is “Replace Pressure Switch” (medium difficulty, ~40 min, DIY cost: $50-$80). 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 Malfunction → Pressure Switch FailedPrimary

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: $160-$240.

Other York Models with Error E03

DERA-P036N07 HP 16 SEER

heat_pump · 2 fixes

GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace

furnace · 2 fixes

TM8E100C20MP11 100,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace

furnace · 2 fixes

YCG42B21S 3.5 Ton 14 SEER Affinity Series Air Conditioner with Scroll Compressor

air_conditioner · 2 fixes

Other York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace Error Codes

Ignition Failure

Flame Sensor Fault

Inducer Motor Failure

2 fixes

E05

High Limit Switch Open

Blower Motor Fault

Limit Circuit Open

Indoor Air Sensor Fault

2 fixes

E09

Control Board Communication Error

2 fixes

People Also Ask About York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace Error E03

What does error code E03 mean on a York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace?

Error code E03 on the York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace means: Pressure Switch Error. The pressure switch did not close or open as expected during the furnace startup sequence. This may be caused by blocked venting, faulty switch, or inducer motor issues, preventing proper combustion.

How do I fix error code E03 on my York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace?

The most successful fix is "Replace Pressure Switch" (medium difficulty, ~40 minutes). Estimated DIY cost: $50-$80. HomeMD has 2 community-ranked fixes for this error.

Is error code E03 on a York TM9V080B12MP11 80,000 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 TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace error E03 myself?

Yes — the top-ranked community fix ("Replace Pressure Switch") is rated medium difficulty and takes about 40 minutes. Tools needed: Phillips screwdriver, Needle-nose pliers.

How much does it cost to repair York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace error E03?

DIY cost: $50-$80. Professional repair typically costs $160-$240. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace have?

The York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace has 8 other known error codes, including: E01 (Ignition Failure), E02 (Flame Sensor Fault), E04 (Inducer Motor Failure), E05 (High Limit Switch Open), E06 (Blower Motor Fault), and 3 more.

Which other York models have the E03 error?

Error code E03 also appears on 4 other York models: DERA-P036N07 HP 16 SEER, GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace, TM8E100C20MP11 100,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace, YCG42B21S 3.5 Ton 14 SEER Affinity Series Air Conditioner with Scroll Compressor. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace have?

The York TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace has 8 other known error codes:

E01 — Ignition Failure (2 fixes)
E02 — Flame Sensor Fault (2 fixes)
E04 — Inducer Motor Failure (2 fixes)
E05 — High Limit Switch Open (2 fixes)
E06 — Blower Motor Fault (2 fixes)
E07 — Limit Circuit Open (2 fixes)
E08 — Indoor Air Sensor Fault (2 fixes)
E09 — Control Board Communication Error (2 fixes)

Which other York models have the E03 error?

Error code E03 also appears on 4 other York models:

DERA-P036N07 HP 16 SEER (heat pump) · 2 fixes
GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace (furnace) · 2 fixes
TM8E100C20MP11 100,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace (furnace) · 2 fixes
YCG42B21S 3.5 Ton 14 SEER Affinity Series Air Conditioner with Scroll Compressor (air conditioner) · 2 fixes

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