# Vaillant Arotherm: excessive noise from compressor

**URL:** <https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824>\
**Category:** Heatpump\
**Tags:** vaillant\
**Created:** [15 January 2025 17:39 UTC](https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824 "2025-01-15T17:39:57Z")\
**Posts on this page:** 1\
**Showing post:** 103

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**Author:** ![TrystanLea](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/trystanlea/32/31_2.png) [@TrystanLea](https://community.openenergymonitor.org/u/TrystanLea)\
**Post date:** [26 September 2025 20:42 UTC](https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824/103 "2025-09-26T20:42:30Z")

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Not necessarily related to compressor noise but for anyone interested in max output capacities under defrost conditions we’re looking for help this winter in establishing if the pump speed setting max or auto makes any difference. A couple of systems indicate that the max pump setting might enable higher outputs [Vaillant maximum output capacity testing - #183 by TrystanLea](https://community.openenergymonitor.org/t/vaillant-maximum-output-capacity-testing/27221/183)

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_[View the full topic](https://community.openenergymonitor.org/t/vaillant-arotherm-excessive-noise-from-compressor/27824)._