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York · YZF42B21S LX Series AC

York YZF42B21S LX Series AC E8 Error Fix: Indoor Coil Freeze Protection Activated

The indoor coil temperature is below safe limits indicating potential coil freeze due to airflow restriction or refrigerant issues. The system shuts down to prevent damage.

High severity2 fixes available

Quick Answer

Error E8 on the York YZF42B21S LX Series AC means: Indoor Coil Freeze Protection Activated. The top-ranked community fix is “Inspect Refrigerant Levels and Defrost Coil” (hard difficulty, ~60 min, DIY cost: $0-$40). 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.

Root Cause Analysis

Refrigerant IssuePrimary

When to Call a Professional

While many air conditioner 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: $200-$300.

Other York Models with Error E8

DERA-F036N07 14 SEER

air_conditioner · 2 fixes

YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor

heat_pump · 2 fixes

YZH36B21S 3 Ton 16 SEER 9.5 HSPF Heat Pump with Environmentally Friendly Refrigerant

heat_pump · 2 fixes

Other York YZF42B21S LX Series AC Error Codes

Indoor Temperature Sensor Failure

2 fixes

Outdoor Coil Temperature Sensor Fault

2 fixes

High Pressure Switch Trip

2 fixes

Low Pressure Switch Trip

2 fixes

Compressor Overcurrent Protection

2 fixes

Indoor Fan Motor Locked Rotor

2 fixes

Outdoor Fan Motor Locked Rotor

2 fixes

Drain Pump Failure

2 fixes

People Also Ask About York YZF42B21S LX Series AC Error E8

What does error code E8 mean on a York YZF42B21S LX Series AC?

Error code E8 on the York YZF42B21S LX Series AC means: Indoor Coil Freeze Protection Activated. The indoor coil temperature is below safe limits indicating potential coil freeze due to airflow restriction or refrigerant issues. The system shuts down to prevent damage.

How do I fix error code E8 on my York YZF42B21S LX Series AC?

The most successful fix is "Inspect Refrigerant Levels and Defrost Coil" (hard difficulty, ~60 minutes). Estimated DIY cost: $0-$40. HomeMD has 2 community-ranked fixes for this error.

Is error code E8 on a York YZF42B21S LX Series AC serious?

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Can I fix York YZF42B21S LX Series AC error E8 myself?

Yes — the top-ranked community fix ("Inspect Refrigerant Levels and Defrost Coil") is rated hard difficulty and takes about 60 minutes. Tools needed: HVAC gauges, Multimeter.

How much does it cost to repair York YZF42B21S LX Series AC error E8?

DIY cost: $0-$40. Professional repair typically costs $200-$300. Many homeowners save money by trying the top-ranked community fix first.

What other error codes does the York YZF42B21S LX Series AC have?

The York YZF42B21S LX Series AC has 8 other known error codes, including: E1 (Indoor Temperature Sensor Failure), E2 (Outdoor Coil Temperature Sensor Fault), E3 (High Pressure Switch Trip), E4 (Low Pressure Switch Trip), E5 (Compressor Overcurrent Protection), and 3 more.

Which other York models have the E8 error?

Error code E8 also appears on 3 other York models: DERA-F036N07 14 SEER, YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor, YZH36B21S 3 Ton 16 SEER 9.5 HSPF Heat Pump with Environmentally Friendly Refrigerant. The fix may vary by model, so check each model's specific page for tailored repair steps.

What other error codes does the York YZF42B21S LX Series AC have?

The York YZF42B21S LX Series AC has 8 other known error codes:

E1 — Indoor Temperature Sensor Failure (2 fixes)
E2 — Outdoor Coil Temperature Sensor Fault (2 fixes)
E3 — High Pressure Switch Trip (2 fixes)
E4 — Low Pressure Switch Trip (2 fixes)
E5 — Compressor Overcurrent Protection (2 fixes)
E6 — Indoor Fan Motor Locked Rotor (2 fixes)
E7 — Outdoor Fan Motor Locked Rotor (2 fixes)
E9 — Drain Pump Failure (2 fixes)

Which other York models have the E8 error?

Error code E8 also appears on 3 other York models:

DERA-F036N07 14 SEER (air conditioner) · 2 fixes
YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor (heat pump) · 2 fixes
YZH36B21S 3 Ton 16 SEER 9.5 HSPF Heat Pump with Environmentally Friendly Refrigerant (heat pump) · 2 fixes

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