How to Fix / Troubleshooting

Steps:

Check installation: Ensure the window unit is securely mounted with the supplied Hotpoint brackets and side panels. Add shims if the chassis is not level or is flexing.
Tighten brackets: Tighten all mounting screws and brackets securing the unit to the window frame or wall sleeve.
Inspect fans: Check indoor blower and outdoor fan for missing pieces or heavy dirt buildup on one side, which can unbalance them. Clean or replace the blower wheel / fan blade if damaged.
Compressor mounts: With power off, inspect rubber grommets under the compressor. If cracked or missing, have a technician replace the compressor mounting grommets.

Note: Some vibration is normal, but it should not be excessive or cause structural noise.

Unit vibrates excessively, causing the window frame or floor to shake.

Possible Causes