E3
Blaupunkt
Outdoor Condenser Coil Temperature Sensor (T2) Fault
Outdoor unit stops, indoor unit may show E3 and system shuts down after running briefly.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Failed outdoor NTC sensor, Sensor wiring damaged by weather or rodents, Loose sensor connector on outdoor PCB, Sensor not properly attached to condenser coil
How to Fix / Troubleshooting
Safety first: Isolate power at the outdoor disconnect or breaker. Outdoor units contain high voltage and moving parts.
Steps:
- Access outdoor PCB: Remove the service panel on the outdoor unit to expose the control board and wiring.
- Locate T2 sensor: Follow the thin two-core cable from the condenser coil area to the PCB. The sensor is usually strapped or clipped to the condenser coil tubing.
- Inspect sensor and wiring: Check for cracked insulation, corrosion, or a sensor that has fallen off the coil. Re-secure the sensor firmly to the coil with the original clip or metal strap.
- Measure resistance: Disconnect the sensor from the PCB and measure resistance at ambient temperature. Compare to Blaupunkt’s NTC chart; infinite or shorted readings indicate failure.
- Replace if needed: Install a new Blaupunkt outdoor condenser NTC sensor of the same type. Route the cable away from sharp metal edges and fan blades.
- Restore power and test: After reassembly, turn power back on and run the unit. The E3 code should clear if the sensor is functioning.
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Repair Difficulty
Medium
3/5
Required Part
Condenser Coil Temperature Sensor (T2 NTC)
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