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Viessmann · Mini-split

Eh61 Indoor coil sensor (T2) fault

Medium severity Viessmann DLFSHB high wall indoor

What the control is telling you

Indoor coil sensor T2 open or shorted.

Applies to: DLFSHBH high wall indoor units 09-24K (Midea / Carrier / Viessmann) on DLC multi-zone or single-zone outdoor units

Likely causes

  • Sensor plug loose
  • Bad T2 sensor
  • Bad indoor PCB

Test and repair steps

  1. Safety kill power at the disconnect and wait for the inverter capacitors to discharge before touching boards or wiring.
  2. Check the sensor plug on the board and the wire for damage.
  3. Unplug the sensor and measure its resistance. T1-T4 sensors read about 10 kOhm at 77 F (25 C); the discharge sensor (T5/TP) about 54.9 kOhm at 77 F. Compare with the sensor resistance tables.
  4. Out of range or open/shorted replace the sensor. Sensor reads fine: replace the board it plugs into.

Models that show this code

5 models in Viessmann DLFSHB high wall indoor

DLFSHBH09XAKDLFSHBH12XAJDLFSHBH12XAKDLFSHBH18XAKDLFSHBH24XAK

Other codes on the same units

  • EH0b Indoor PCB to display board communication error
  • EH02 Zero-crossing signal error
  • EH03 Indoor fan speed out of range
  • EH30 Indoor external fan low voltage
  • EH31 Indoor external fan over voltage
  • Eh60 Room sensor (T1) fault
  • EL0C Refrigerant leak detected
  • EL01 Indoor / outdoor communication error

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Source: Carrier MS-DLFSHB-01 High Wall Ductless Service Manual (04/2021), Table 9 p.17, p.30. Summarized in our own words; check the original manual for your model.

Homeowner looking at this code? See what it means for you and when to call a technician.

For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.