Range Hood Repair

Range hood repair in Denver: wall, island, under-cabinet, insert and downdraft hoods, including blowers, fans, lights, controls and makeup air dampers. The Appliance Team fixes range hoods across the Denver metro and 30 surrounding cities, from a basic under-cabinet unit to a 1,200 CFM island hood over a 48-inch gas range. The home service call is $99, waived when you go ahead with the repair. You get a written quote before any work starts, and every repair carries a 90-day warranty on parts and labor. Same-day service is available on most weekdays.

Range hoods we service

A range hood is a fan, a filter, a light and a duct working together. Most “broken hood” calls are a failed motor, a dead control board, a stuck damper or a duct problem that makes a good blower look weak. We work on every configuration and on all major brands.

We service Wolf, Thermador, Viking, Zephyr, Broan, Best, Vent-A-Hood, ZLINE, GE, Monogram, Café, Bosch, KitchenAid, JennAir, Miele, Bertazzoni and Faber, plus other major brands. We use genuine OEM parts whenever they are available, and we tell you up front when a motor or board has to be ordered.

Range hood problems we fix

Weak suction is often a duct problem, not a motor problem

Manufacturers are blunt about this. Zephyr lists mounting height outside the recommended range, incorrect or flexible ducting, an improper wall or roof cap, duct obstructions and too little CFM for the cooktop as the causes of a hood that does not capture smoke. Vent-A-Hood says corrugated or flex duct must not be used because it restricts airflow, and that the duct area must be at least equal to the hood’s discharge area for the whole run. Before we sell anyone a new motor, we check the filters, the damper and the duct. A common find is a backdraft damper held shut by a screw that sticks into the duct, which Vent-A-Hood calls out as a frequent obstruction.

Blower wheel and motor failures

Grease is the enemy of a blower. It loads the wheel, throws it out of balance and wears the motor bearings. That is where the rattling, humming and grinding come from. On Vent-A-Hood Magic Lung blowers the wheel is held by a set screw on a flat spot of the motor shaft, and a loose wheel knocks or rattles. Vent-A-Hood also pairs white wheels with white motor rings (clockwise) and black wheels with black rings (counterclockwise). A mismatched wheel and ring will not move air properly. We check rotation and pairing on every centrifugal hood we open.

Controls, lights and boards

Modern hoods use touch panels, LED drivers and timers. A surge can lock a control so the fan will not stop or the lights stay on. Zephyr and other makers recommend a breaker reset first. If the fault returns, the control board, touch panel or LED driver usually needs replacing. Flicker on one light points to the bulb or module. Flicker on all of them points to the driver or board.

Range hood indicator lights and codes

Range hoods have very few true error codes. Most of what you see on the panel is a filter reminder that counts blower run time. The hours and reset steps differ by brand and model, so check your manual if the steps below do not match your panel. If a code or blinking light is not a filter reminder, write it down before you call.

Filter reminders by brand

Behaviors that act like codes

How a range hood repair visit works

• Diagnosis. We test power at the hood, the control output and the motor, check the light circuit, and inspect the filters, damper and as much of the duct as we can reach.
• Written quote. You get the cause and the price in writing before we start. The $99 service call is waived if you proceed.
• Parts. Common motors, switches and bulbs may be on the truck. Brand-specific blowers, boards and touch panels are often ordered, and we say so at the visit.
• Warranty. Every repair has a 90-day warranty on parts and labor. We repair hoods in or out of the manufacturer’s warranty, and the choice of who does the work is yours.

Before you call: safe checks

• Reset the breaker. Turn it off for 30 seconds, then back on. Zephyr suggests 5–10 minutes for a locked control.
• Pull and clean the grease filters. A loaded filter cuts airflow and can make the motor overheat and cycle.
• Check that every filter is seated. Unseated filters cause whistling and, on some Monogram hoods, a blinking filter light.
• Replace a bulb if only one light is out or flickering.
• Go outside and look at the wall or roof cap while the fan runs. The flap should open. If it does not, the damper is stuck.
• Do not open the hood’s wiring compartment or work on the motor with power on. Leave that to us.

Denver code notes: makeup air and ducting

Large hoods in Denver homes raise a code question: makeup air. The International Residential Code, section M1503.6, requires makeup air for kitchen exhaust systems that can move more than 400 CFM when a fuel-burning appliance inside the home’s air barrier is not direct-vent and does not use a mechanical draft system. Think of an older natural-draft gas furnace or water heater. The makeup air must roughly equal the exhaust rate and run through a damper that opens automatically when the hood runs. Green Building Advisor notes the 400 CFM rule first appeared in the 2009 IRC and was narrowed in 2018 to homes with naturally drafted appliances. Denver’s current residential code is based on the 2021 IRC with local amendments, so the Denver permit office has the final word on a specific kitchen.

Why it matters for repair: a strong hood in a tight house can starve itself of air. It sounds loud but captures poorly, and it can pull exhaust gases back down a natural-draft flue. If your hood is over 400 CFM and the makeup air damper is not opening, that is a repair item. We test the damper and its interlock.

The IRC also requires range hoods and downdraft fans to be listed to UL 507, and ducts to be smooth, airtight and vented outdoors with a backdraft damper. M1503.3 says cooking exhaust must not end in an attic, a crawl space or inside the building. Ducts must be galvanized steel, stainless steel or copper. For sizing, Broan-NuTone recommends at least 100 CFM per 10,000 BTU of gas cooktop output, so an 80,000 BTU range calls for about 800 CFM. Electric and induction cooktops often need about 350–500 CFM.

Range hood maintenance schedule

Repair or replace your range hood?

Most premium hoods are worth repairing. A Wolf, Thermador, Vent-A-Hood or Monogram hood is sized and finished to match the kitchen, and a replacement often means new ductwork, new mounting and sometimes new cabinetry or a new custom liner. A blower motor, a control board or an LED driver is usually a much smaller job than that.

Replacement makes more sense when the hood is a basic under-cabinet unit and the motor and controls have both failed, when the parts are discontinued, or when the hood is simply too small for the range. If the hood never captured well because it is undersized or mounted too high, a new motor will not fix that. We will tell you so instead of selling you a part that will not solve the problem.

Range hood repair near you

We repair range hoods in Denver, Cherry Creek, Greenwood Village, Castle Pines, Boulder, Lone Tree, Highlands Ranch, Parker, Golden and Louisville, plus the rest of the metro.

Related services: range repair, oven repair, microwave repair (including over-the-range models) and dryer vent cleaning. Brand pages: Wolf, Thermador, Viking, ZLINE and Monogram.