🌡️Heat Pump

TXV-FAIL

Daikin · DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump

Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump TXV-FAIL Error Fix: Expansion Valve Failure

Thermostatic expansion valve (TXV) failure — the metering device is stuck open, stuck closed, or hunting, causing improper refrigerant flow and poor performance

Medium severity2 fixes available✨ Free fix available

Quick Answer

Error TXV-FAIL on the Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump means: Expansion Valve Failure. The top-ranked community fix is “Test and Replace the Thermostatic Expansion Valve” (hard difficulty, ~120 min, DIY cost: $10-$20). 2 community-ranked fixes available below.

Published February 2026 · 2 fixes · heat pump

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 heat pump 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: $350-$600.

Other Daikin Models with Error TXV-FAIL

DX14SN0181 1.5 Ton 14 SEER Single-Stage Air Conditioner

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DX16SA0361 16 SEER AC

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DX17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Air Conditioner

air_conditioner · 2 fixes

DX20VC0361 20 SEER AC

air_conditioner · 2 fixes

DZ14SA0301 2.5 Ton 14 SEER Single-Stage Heat Pump

heat_pump · 2 fixes

DZ16SA0361 3 Ton 16 SEER Single-Stage Heat Pump

heat_pump · 2 fixes

DZ20VC0361 20 SEER HP

heat_pump · 2 fixes

Other Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump Error Codes

CAP-FAIL

Capacitor Failure

2 fixes

COIL-ICE

Excessive Outdoor Coil Icing

Compressor Failure

Compressor Overheating

Contactor Failure

Defrost Cycle Not Initiating

Dirty Condenser Coil

Condensate Drain Clogged

2 fixes

People Also Ask About Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump Error TXV-FAIL

What does error code TXV-FAIL mean on a Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump?

Error code TXV-FAIL on the Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump means: Expansion Valve Failure. Thermostatic expansion valve (TXV) failure — the metering device is stuck open, stuck closed, or hunting, causing improper refrigerant flow and poor performance

How do I fix error code TXV-FAIL on my Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump?

The most successful fix is "Test and Replace the Thermostatic Expansion Valve" (hard difficulty, ~120 minutes). Estimated DIY cost: $10-$20. HomeMD has 2 community-ranked fixes for this error.

Is error code TXV-FAIL on a Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump serious?

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Can I fix Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump error TXV-FAIL myself?

Yes — the top-ranked community fix ("Test and Replace the Thermostatic Expansion Valve") is rated hard difficulty and takes about 120 minutes. Tools needed: Refrigerant manifold gauge set, Vacuum pump, Adjustable wrenches, T20 Torx screwdriver.

How much does it cost to repair Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump error TXV-FAIL?

DIY cost: $10-$20. Professional repair typically costs $350-$600. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump have?

The Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump has 8 other known error codes, including: CAP-FAIL (Capacitor Failure), COIL-ICE (Excessive Outdoor Coil Icing), COMP-FAIL (Compressor Failure), COMP-OVERHEAT (Compressor Overheating), CONTACTOR (Contactor Failure), and 3 more.

Which other Daikin models have the TXV-FAIL error?

Error code TXV-FAIL also appears on 7 other Daikin models: DX14SN0181 1.5 Ton 14 SEER Single-Stage Air Conditioner, DX16SA0361 16 SEER AC, DX17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Air Conditioner, DX20VC0361 20 SEER AC, DZ14SA0301 2.5 Ton 14 SEER Single-Stage Heat Pump, DZ16SA0361 3 Ton 16 SEER Single-Stage Heat Pump, and 1 more. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump have?

The Daikin DZ17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Heat Pump has 8 other known error codes:

CAP-FAIL — Capacitor Failure (2 fixes)
COIL-ICE — Excessive Outdoor Coil Icing (2 fixes)
COMP-FAIL — Compressor Failure (2 fixes)
COMP-OVERHEAT — Compressor Overheating (2 fixes)
CONTACTOR — Contactor Failure (2 fixes)
DEFROST-FAIL — Defrost Cycle Not Initiating (2 fixes)
DIRTY-COND — Dirty Condenser Coil (2 fixes)
DRAIN-CLOG — Condensate Drain Clogged (2 fixes)

Which other Daikin models have the TXV-FAIL error?

Error code TXV-FAIL also appears on 7 other Daikin models:

DX14SN0181 1.5 Ton 14 SEER Single-Stage Air Conditioner (air conditioner) · 2 fixes
DX16SA0361 16 SEER AC (air conditioner) · 2 fixes
DX17VSS036 3 Ton 17 SEER2 Daikin Fit Side-Discharge Air Conditioner (air conditioner) · 2 fixes
DX20VC0361 20 SEER AC (air conditioner) · 2 fixes
DZ14SA0301 2.5 Ton 14 SEER Single-Stage Heat Pump (heat pump) · 2 fixes
DZ16SA0361 3 Ton 16 SEER Single-Stage Heat Pump (heat pump) · 2 fixes
DZ20VC0361 20 SEER HP (heat pump) · 2 fixes

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