E03
Temperature Sensor Error
The HRV temperature sensor is providing incorrect readings or has failed completely. The system may continue to operate but with reduced efficiency and inability to properly regulate temperature exchange.
- Sensor wiring disconnected or damaged
- Sensor probe failure from age or moisture
- Interference from nearby electrical sources
- Control board sensor circuit malfunction
- E03 error code on display
- Inconsistent temperature readings
- System running constantly or cycling frequently
- Reduced heat recovery efficiency
Power off system at breaker
Visually inspect sensor wiring for loose connections
Check sensor probe for visible damage or corrosion
Reconnect any loose wiring (power OFF)
Power on and observe if error clears
If error persists, contact professional for sensor replacement
Important: If these steps do not resolve the issue or you are uncomfortable performing them, contact a professional HVAC technician immediately.
- Annual sensor cleaning and inspection
- Check sensor connections during routine maintenance
- Keep sensor area free from dust and moisture
- Test sensor calibration annually
Will my HRV still work with a faulty temperature sensor?
The HRV will continue to ventilate but may not optimize heat recovery, potentially increasing energy costs. Prompt sensor repair or replacement is recommended.
How much does temperature sensor replacement cost?
Sensor replacement typically costs $150-$300 including parts and labor. Contact us for an exact quote for your specific HRV model.
Need Immediate Assistance?
Our expert technicians are available 24/7 for emergency HRV repairs. Don't let error code E03 disrupt your comfort.