🔥Furnace

E03

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

York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace E03 Error Fix: Pressure Switch Open

The pressure switch failed to close indicating a venting or inducer motor problem. This error is triggered when the furnace cannot detect proper airflow, preventing ignition to avoid unsafe conditions.

High severity2 fixes available

Quick Answer

Error E03 on the York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace means: Pressure Switch Open. The top-ranked community fix is “Replace Pressure Switch” (hard difficulty, ~45 min, DIY cost: $40-$65). 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

Sensor Malfunction → Pressure Switch Failed

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: $150-$220.

Other York Models with Error E03

DERA-P036N07 HP 16 SEER

heat_pump · 2 fixes

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

furnace · 2 fixes

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

furnace · 2 fixes

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

air_conditioner · 2 fixes

Other York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace Error Codes

Ignition Failure

Flame Sensor Fault

Limit Switch Open

Inducer Motor Failure

2 fixes

E06

Blower Motor Overcurrent

2 fixes

E07

Thermostat Communication Failure

2 fixes

E08

Flame Rollout Switch Open

2 fixes

E09

Open Limit Circuit

2 fixes

People Also Ask About York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace Error E03

What does error code E03 mean on a York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace?

Error code E03 on the York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace means: Pressure Switch Open. The pressure switch failed to close indicating a venting or inducer motor problem. This error is triggered when the furnace cannot detect proper airflow, preventing ignition to avoid unsafe conditions.

How do I fix error code E03 on my York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace?

The most successful fix is "Replace Pressure Switch" (hard difficulty, ~45 minutes). Estimated DIY cost: $40-$65. HomeMD has 2 community-ranked fixes for this error.

Is error code E03 on a York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow 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 GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace error E03 myself?

Yes — the top-ranked community fix ("Replace Pressure Switch") is rated hard difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver, Multimeter.

How much does it cost to repair York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace error E03?

DIY cost: $40-$65. Professional repair typically costs $150-$220. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace have?

The York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace has 8 other known error codes, including: E01 (Ignition Failure), E02 (Flame Sensor Fault), E04 (Limit Switch Open), E05 (Inducer Motor Failure), E06 (Blower Motor Overcurrent), 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, TM8E100C20MP11 100,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace, TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed 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 GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace have?

The York GM9S080B12MP11 80,000 BTU 96% AFUE Single-Stage Upflow Gas Furnace has 8 other known error codes:

E01 — Ignition Failure (2 fixes)
E02 — Flame Sensor Fault (2 fixes)
E04 — Limit Switch Open (2 fixes)
E05 — Inducer Motor Failure (2 fixes)
E06 — Blower Motor Overcurrent (2 fixes)
E07 — Thermostat Communication Failure (2 fixes)
E08 — Flame Rollout Switch Open (2 fixes)
E09 — Open Limit Circuit (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
TM8E100C20MP11 100,000 BTU 80% AFUE Single-Stage Upflow Gas Furnace (furnace) · 2 fixes
TM9V080B12MP11 80,000 BTU 96% AFUE 2-Stage Variable-Speed Gas Furnace (furnace) · 2 fixes
YCG42B21S 3.5 Ton 14 SEER Affinity Series Air Conditioner with Scroll Compressor (air conditioner) · 2 fixes

Ad Space — banner

Replace ADSENSE_PUBLISHER_ID in AdUnit.tsx