Bosch Heat Pump Error Code EA 410: How to Fix It

Q: What causes Bosch heat pump error EA 410?

Error EA 410 is caused by a faulty compressor discharge temperature sensor, loose wiring connections, or occasionally a malfunctioning control board that cannot properly read the sensor signal.

Q: Can I run my Bosch heat pump with EA 410 error?

No, the heat pump will shut down when EA 410 occurs to protect the compressor from overheating. The system will not operate until the sensor fault is resolved.

Q: How much does it cost to fix EA 410 error?

If it's just loose wiring, the fix is free. A new discharge temperature sensor typically costs $50-150, plus $150-300 in labor if professionally installed.

Q: Is EA 410 a serious problem?

EA 410 is moderately serious because it prevents heat pump operation and could indicate potential compressor issues. However, it's often a simple sensor or wiring problem that's easily fixed.

Q: How often should heat pump sensors be replaced?

Temperature sensors typically last 10-15 years under normal conditions. They may fail sooner in harsh environments with extreme temperatures or moisture exposure.

Abstract

Bosch heat pump error code EA 410 indicates a fault with the compressor discharge temperature sensor, which monitors the temperature of refrigerant leaving the compressor. This sensor is critical for preventing compressor overheating and ensuring efficient operation.