---
title: "Range hoods & ventilation"
description: "Thermador range hoods and ventilation: paired to the cooktop below it and, on the newer kitchens, talking to it — a hood that will not follow the burner…"
url: "https://thermadormiami.support/appliances/vent-hood/"
date_modified: "2026-08-28"
Appliance type: "Range hoods & ventilation"
---


# Thermador range hoods & ventilation

### The quietest part of the kitchen to ignore

A hood is the appliance people notice last and clean least. Most of what we are called out for on them is maintenance that had been postponed rather than a failure.

### What actually goes wrong

- **The fan not starting, or stuck at one speed.** Motor, capacitor or the control, and which of the three is usually clear from whether it hums.
- **The light out while the fan works.** Two separate circuits, so this is the smaller job it sounds like.
- **A hood that no longer follows the cooktop.** On the newer kitchens the two talk to each other, and a hood that has stopped answering is a connection question rather than a motor one.
- **A pull-out that will not pull out.** The mechanism is a slide with a switch on it; when it jams the fan often never gets asked to run.
- **Grease.** Filters left long enough stop being filters, and everything behind them starts doing their job instead.

### Salt air and dampers

The damper at the end of the duct is the part this coast is hardest on: it sits in the airflow, it is out of sight, and it corrodes until it stops opening. A hood that sounds normal and clears nothing is usually a damper rather than a motor. If yours ducts out through an exterior wall within sight of the water, mention it — it moves that check to the top of the list.

Pull-out · Chimney · Island · Downdraft

Range hood repair

The fan not starting or running at one speed

The light out while the fan works

A hood that no longer follows the cooktop

The quietest part of the kitchen to ignore

A hood is the appliance people notice last and clean least. Most of what we are called out for on them is maintenance that had been postponed rather than a failure.

What actually goes wrong

The fan not starting, or stuck at one speed. Motor, capacitor or the control, and which of the three is usually clear from whether it hums.

The light out while the fan works. Two separate circuits, so this is the smaller job it sounds like.

A hood that no longer follows the cooktop. On the newer kitchens the two talk to each other, and a hood that has stopped answering is a connection question rather than a motor one.

A pull-out that will not pull out. The mechanism is a slide with a switch on it; when it jams the fan often never gets asked to run.

Grease. Filters left long enough stop being filters, and everything behind them starts doing their job instead.

Salt air and dampers

The damper at the end of the duct is the part this coast is hardest on: it sits in the airflow, it is out of sight, and it corrodes until it stops opening. A hood that sounds normal and clears nothing is usually a damper rather than a motor. If yours ducts out through an exterior wall within sight of the water, mention it — it moves that check to the top of the list.

### The hood stopped following the cooktop automatically.

These pair over the home network, so the first question is whether the network changed — a new router, a new password, a band that the appliances cannot use. Check the hood still works from its own controls; if it does, nothing is broken and the pairing needs redoing.

### The light works and the fan does not.

Then the supply is fine and the motor or its speed control is not. On a pull-out hood there is a third possibility worth eliminating first: the fan will not run until the front is slid out, and a mechanism that has stiffened can leave it a few millimeters short.

### It has got much louder than it was.

Almost always the filters. Grease-laden mesh makes the motor work harder and the airflow noisier, and in a kitchen that cooks daily they need washing more often than most people do it. If clean filters do not quieten it, the motor bearings are next.

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