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Vaillant · Heat pumps · Vaillant aroTHERM plus with uniTOWER plus

F.732Compressor outlet temperature too high

Name in the manufacturer's documentation (service manual): Compressor outlet temperature too high[1]

In plain words (editorial)

The compressor outlet temperature is too high (the manual gives above 110 °C). The manual names exceeded application limits, an EEV that does not open correctly, or too little refrigerant; it also lists a leak-tightness test and checking that the service valves are open.

When to call a service technician: Contact a competent heating engineer (installer or Vaillant customer service).

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified F.732 Compressor outlet temperature too high
  2. [2] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified The compressor outlet temperature is above 110 °C
  3. [3] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Application limits exceeded
  4. [4] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified EEV does not work or does not open correctly
  5. [5] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Refrigerant volume too low (frequent defrosting due to extremely low evaporation temperatures)
  6. [6] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Check the compressor inlet sensor and outlet sensor
  7. [7] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Check the compressor outlet temper- ature sensor (TT135)
  8. [8] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Check the EEV (does the EEV move to the limit stop? Use the sensor/actuator test)
  9. [9] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Check the refrigerant volume (see Technical data)
  10. [10] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Carry out a leak-tightness test
  11. [11] Vaillant uniTOWER plus VIH QW 190/6 E – Operating, installation and maintenance instructions (0020291525_05) (0020291525_05) , p. 61 official manufacturer document quote verified Check whether the service valves on the outdoor unit are open