---
title: "Hood filter and duct service cost"
description: "La Cornue hood filter and duct service cost — flow measured as found, baffles cleaned or replaced, damper and termination freed, flow proved afterwards."
url: "https://la-cornuemiami.support/repair-cost/hood-filter-and-duct-service-cost/"
date_modified: "2026-09-03"
Appliance type: "Range hoods"
---


# La Cornue hood filter and duct service cost

### Why this matters to the range, not just the room

Grease the hood does not catch goes onto the cabinets, the ceiling and eventually into the cabinet under the cooktop where the induction generator lives — and the one error code La Cornue documents, E2, is about electronics getting too hot. A hood at half its rated flow is therefore not only a comfort problem; it shortens the life of the most expensive electronic assembly in the range. Which is why the hood is part of the annual maintenance visit rather than something to look at when somebody complains.

What moves this figure

from $175, and the first fix is often free

600 CFM assumes an unobstructed duct — most losses are in the run

A coastal termination cap is a salt and grease trap

Baffle condition

Dishwasher safe by design. Saturated, they are the whole problem.

The duct run

Length, crushes, elbows added after installation. Measured, not assumed.

The damper and cap

A seized backdraft damper and a greased roof cap undo a healthy blower.

Whether the capture tray needs doing

Behind the baffles, messier, and needed a few times a year.

Whether it turns out to be the blower

Where the path is genuinely clear, that is the other page.

Why this matters to the range, not just the room

Grease the hood does not catch goes onto the cabinets, the ceiling and eventually into the cabinet under the cooktop where the induction generator lives — and the one error code La Cornue documents, E2, is about electronics getting too hot. A hood at half its rated flow is therefore not only a comfort problem; it shortens the life of the most expensive electronic assembly in the range. Which is why the hood is part of the annual maintenance visit rather than something to look at when somebody complains.

### How often should baffles be cleaned?

Over this range, every four to six weeks with real use, monthly if you grill or use the plaque regularly. They go in the dishwasher, which is the point of baffles over mesh. The channels and capture tray want doing a few times a year. If yours have been done twice a year, the hood has been running well below its rating for most of its life.

### Would a bigger blower fix weak suction?

Rarely, and it is usually the wrong money. A 600 CFM blower against a restricted duct does not improve by getting bigger — the restriction limits the flow, and a bigger fan against the same restriction is louder rather than stronger. Fix the path and measure it.

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