York YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor E17 Error Fix: Auxiliary Heater Failure

Error code E17 on the York YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor means: Auxiliary Heater Failure. The auxiliary electric heater has failed or is not operating correctly, reducing the heat pump’s ability to maintain indoor temperature during cold conditions.

The most successful fix is "Replace auxiliary heater element" (medium difficulty, ~60 minutes). Estimated DIY cost: $90-$130. HomeMD has 2 community-ranked fixes for this error.

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

Yes — the top-ranked community fix ("Replace auxiliary heater element") is rated medium difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, Multimeter.

DIY cost: $90-$130. Professional repair typically costs $200-$350. Many homeowners save money by trying the top-ranked community fix first.

The York YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor has 8 other known error codes, including: E1 (High Pressure Switch Trip), E10 (Indoor Coil Freeze Warning), E11 (Compressor Start Relay Failure), E12 (Communication Error Between Indoor and Outdoor Units), E13 (Outdoor Ambient Temperature Sensor Failure), and 3 more.

Error code E17 also appears on 6 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, 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, 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.