❄️Air Conditioner

COMPRESSOR FAILURE

Lennox · ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner

Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner COMPRESSOR FAILURE Error Fix: Compressor Failure

The compressor — the most expensive single component — has failed. Symptoms: outdoor unit hums or trips breaker, no cooling. Types: seized (mechanical), open winding (electrical), grounded winding. Test compressor terminals with multimeter. Lennox offers 10-year compressor warranty. Replacement $1,500–$3,000+ installed.

critical2 fixes available✨ Free fix available

Quick Answer

Error COMPRESSOR FAILURE on the Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner means: Compressor Failure. The top-ranked community fix is “Test Compressor Windings and Replace Compressor if Faulty” (hard difficulty, ~180 min, DIY cost: $0-$50). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · air conditioner

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.

When to Call a Professional

While many air conditioner 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: $1500-$3000+.

Other Lennox Models with Error COMPRESSOR FAILURE

XC21 Dave Lennox Signature Collection 21 SEER Variable-Capacity Air Conditioner

air_conditioner · 2 fixes

XC25 Dave Lennox Signature Collection 26 SEER Variable-Capacity Air Conditioner

air_conditioner · 2 fixes

XP21 Dave Lennox Signature Collection 20 SEER Heat Pump

heat_pump · 2 fixes

XP25 Dave Lennox Signature Collection Variable-Capacity Heat Pump

heat_pump · 2 fixes

Other Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner Error Codes

1 FLASH YELLOW

High Pressure Switch Open

2 fixes

2 FLASHES YELLOW

Low Pressure Switch Open

2 fixes

3 FLASHES YELLOW

Compressor Thermal Overload

2 fixes

4 FLASHES YELLOW

Short-Cycle Protection

2 fixes

CAPACITOR FAILURE

Capacitor Failure (Run/Start)

2 fixes

CONDENSER FAN FAIL

Condenser Fan Motor Failure

Contactor Failure

Dirty Condenser Coil

People Also Ask About Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner Error COMPRESSOR FAILURE

What does error code COMPRESSOR FAILURE mean on a Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner?

Error code COMPRESSOR FAILURE on the Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner means: Compressor Failure. The compressor — the most expensive single component — has failed. Symptoms: outdoor unit hums or trips breaker, no cooling. Types: seized (mechanical), open winding (electrical), grounded winding. Test compressor terminals with multimeter. Lennox offers 10-year compressor warranty. Replacement $1,500–$3,000+ installed.

How do I fix error code COMPRESSOR FAILURE on my Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner?

The most successful fix is "Test Compressor Windings and Replace Compressor if Faulty" (hard difficulty, ~180 minutes). Estimated DIY cost: $0-$50. HomeMD has 2 community-ranked fixes for this error.

Is error code COMPRESSOR FAILURE on a Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner 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 Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner error COMPRESSOR FAILURE myself?

Yes — the top-ranked community fix ("Test Compressor Windings and Replace Compressor if Faulty") is rated hard difficulty and takes about 180 minutes. Tools needed: Multimeter, Refrigerant recovery machine, Manifold gauge set, Wrenches, Torque wrench.

How much does it cost to repair Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner error COMPRESSOR FAILURE?

DIY cost: $0-$50. Professional repair typically costs $1500-$3000+. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner have?

The Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner has 8 other known error codes, including: 1 FLASH YELLOW (High Pressure Switch Open), 2 FLASHES YELLOW (Low Pressure Switch Open), 3 FLASHES YELLOW (Compressor Thermal Overload), 4 FLASHES YELLOW (Short-Cycle Protection), CAPACITOR FAILURE (Capacitor Failure (Run/Start)), and 3 more.

Which other Lennox models have the COMPRESSOR FAILURE error?

Error code COMPRESSOR FAILURE also appears on 4 other Lennox models: XC21 Dave Lennox Signature Collection 21 SEER Variable-Capacity Air Conditioner, XC25 Dave Lennox Signature Collection 26 SEER Variable-Capacity Air Conditioner, XP21 Dave Lennox Signature Collection 20 SEER Heat Pump, XP25 Dave Lennox Signature Collection Variable-Capacity Heat Pump. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner have?

The Lennox ML14XC1 Merit Series 14 SEER Single-Stage Air Conditioner has 8 other known error codes:

1 FLASH YELLOW — High Pressure Switch Open (2 fixes)
2 FLASHES YELLOW — Low Pressure Switch Open (2 fixes)
3 FLASHES YELLOW — Compressor Thermal Overload (2 fixes)
4 FLASHES YELLOW — Short-Cycle Protection (2 fixes)
CAPACITOR FAILURE — Capacitor Failure (Run/Start) (2 fixes)
CONDENSER FAN FAIL — Condenser Fan Motor Failure (2 fixes)
CONTACTOR FAILURE — Contactor Failure (2 fixes)
DIRTY CONDENSER — Dirty Condenser Coil (2 fixes)

Which other Lennox models have the COMPRESSOR FAILURE error?

Error code COMPRESSOR FAILURE also appears on 4 other Lennox models:

XC21 Dave Lennox Signature Collection 21 SEER Variable-Capacity Air Conditioner (air conditioner) · 2 fixes
XC25 Dave Lennox Signature Collection 26 SEER Variable-Capacity Air Conditioner (air conditioner) · 2 fixes
XP21 Dave Lennox Signature Collection 20 SEER Heat Pump (heat pump) · 2 fixes
XP25 Dave Lennox Signature Collection Variable-Capacity Heat Pump (heat pump) · 2 fixes

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