Vaillant
Mounting / Anti‑Vibration Isolation Problem
Outdoor unit vibrates excessively and transmits noise into the building
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Possible Causes
Outdoor unit not level, Missing or deteriorated rubber feet, Loose mounting bolts on wall brackets, Refrigerant pipes rigidly fixed to structure
How to Fix / Troubleshooting
Safety: Turn off power before working around the outdoor unit. Use appropriate lifting techniques or assistance.
- Check level: Use a spirit level to ensure the outdoor unit is level. Adjust bracket or pad as needed.
- Inspect rubber feet: Replace cracked or missing anti‑vibration pads under the unit feet.
- Tighten bolts: Tighten all mounting bolts on wall brackets or floor stands.
- Isolate piping: Insert foam or rubber sleeves where refrigerant pipes contact walls or brackets to reduce vibration transmission.
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Repair Difficulty
Easy
2/5
Required Part
Outdoor Unit Mounting Feet / Anti‑Vibration Pads
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