Hood Got Louder After the Filters Were Cleaned
| Reads like | Actually is |
|---|---|
| The wash has broken something | A set of filters back in the wrong way round — Stainless Baffle Filters |
| The blower is on its way out | A wheel now free to move air it could not shift before |
| It was quieter when it was dirty | A loaded filter muffling the very same motor |
Clean filters, worse hood
Grease is a muffler. A loaded set of baffles restricts what the blower can pull and damps the sound of it doing so. Wash them and both effects go at once. Some of what you are now hearing is simply the hood working again.
Refitted the wrong way round
The rest is usually fitment. Where the canopy carries baffles, they are angled plates in a frame, built to sit one way up and one way round in their channel. Turned over they still slide in and still look right from below, but the air now crosses them against the grain.
Putting them back so they drain
Take the whole set out and lay them on the counter in order. Set them all facing the same way, then slide them home until every catch engages and none of them rocks. If the noise survives a set that is seated and matching, the conversation moves to the wheel behind them.
What you can look at yourself
- Pull each filter and compare them side by side. They are not symmetrical end to end, so if one sits the opposite way round to its neighbour, one of the two is wrong.
- Press each one down until its catch takes hold. A filter riding high leaves a slot at the top that whistles as soon as the hood is stepped up.
- Make sure the wash left nothing behind — a clip, a cloth, a handle folded flat where it can buzz.
- Stop there. Anything behind a panel, above the cabinets or on a roof is the visit — Wolf Repair Los Angeles, (310) 626-4008.
Follow-ups
Should they be dry before they go back?
Yes, and not only for the sake of the metal. A wet filter put straight back holds water against the channel where nobody can see it, and the first proper cook drives that off as steam. Leave them to drain, refit them square, and run the hood empty for a minute.