York YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor E14 Error Fix: High Limit Thermostat Open

Error code E14 on the York YHG42B21S 3.5 Ton 14 SEER 10 HSPF Affinity Series Heat Pump with Variable-Speed Compressor means: High Limit Thermostat Open. The high limit thermostat has opened due to overheating in the heat pump system. This safety device prevents damage by shutting down the system when temperatures exceed safe limits.

The most successful fix is "Replace high limit thermostat" (medium difficulty, ~45 minutes). Estimated DIY cost: $30-$50. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

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

DIY cost: $30-$50. Professional repair typically costs $150-$250. 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 E14 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.