The fan, lights, display, and buttons are all completely unresponsive. Range-hood performance depends on the appliance, filters, ducting, and installation, so the sound of a running fan alone does not confirm proper ventilation.
Common causes
- The breaker, receptacle, plug, or hardwired supply has a problem
- A connection in the hood or junction box is loose
- An internal fuse, line filter, or power-supply board has failed
- Heat or grease has damaged wiring or a control component
How the problem is diagnosed
Diagnosis starts at the electrical supply and proceeds through the cord or hardwired connection, junction points, protective devices, power supply, and control. This avoids replacing internal parts when the fault is at the breaker, receptacle, or connection.
Electrical and airflow findings are considered together. Appliance Repair Pro explains the diagnosis and provides an upfront estimate before approved work begins.
Information to prepare
Note whether the loss of power followed cleaning, a power outage, a lamp failure, or a breaker trip, and whether other kitchen circuits still work. The full model number and a photo of the hood and duct arrangement can help identify the correct parts and service scope.
Repair or replace?
Switches, lights, capacitors, and some motors are often serviceable when parts are available. Replacement may make more sense when the hood has extensive grease damage, an unavailable integrated control, or an installation that cannot deliver adequate capture. Diagnosis helps separate an appliance repair from a duct or installation issue.
