How to Clean and Maintain Your Blodgett Commercial Oven

What a Blodgett oven is and why it matters for your kitchen

A Blodgett oven is a commercial-grade convection or deck oven built for high-volume cooking in restaurants, bakeries, and institutional kitchens. Blodgett Manufacturing, based in Vermont, has made these ovens since 1896, and they're designed to heat evenly and hold temperature reliably across multiple racks. If you own or operate one, you're working with equipment that's built to last—but only if you keep it clean and maintain it properly.

Unlike a home oven, a Blodgett commercial unit runs hotter, cycles more frequently, and accumulates grease and food residue faster. The stakes are higher: a dirty oven loses efficiency, cooks unevenly, and can become a fire hazard. Regular cleaning and maintenance aren't optional—they're part of keeping your oven safe and your food consistent.

Key Takeaways

• Blodgett ovens need daily wipe-downs of interior surfaces and weekly deep cleaning of racks and the deck to prevent grease buildup and uneven heating.
• The heating elements, thermostats, and door seals should be inspected monthly for damage or wear, and any visible corrosion or cracks mean it's time to call a technician.
• Convection models require the fan and vents to be checked for debris every two weeks, since blocked airflow reduces cooking performance and can damage the motor.
• Blodgett ovens should be professionally serviced at least once a year, and more often if the oven runs continuously or in a high-grease environment like a fryer station.
• Keeping a maintenance log—even a simple notebook—helps you spot patterns in performance and catch small problems before they become expensive repairs.

Daily cleaning routine for the interior and racks

Start each day by letting the oven cool slightly, then wipe down the interior walls and floor with a damp cloth or soft brush. Don't use abrasive scouring pads on stainless steel surfaces—they scratch and create spots where grease and bacteria hide. A mild degreaser diluted in warm water works well; spray it on, let it sit for a minute, and wipe clean. Pay special attention to corners and seams where grease pools.

Remove the racks and soak them in a commercial degreaser or a hot water bath with dish soap for 15 to 30 minutes. Use a soft brush or plastic scraper to loosen baked-on food, then rinse thoroughly and dry before replacing them. If you have a walk-in or deck oven with a removable floor, sweep out crumbs and debris daily—they burn and create smoke that affects food flavor and air quality.

Wipe the exterior stainless steel with a microfiber cloth and a stainless steel cleaner or a mix of white vinegar and water. This prevents fingerprints from etching the surface and keeps your kitchen looking professional. Check the door glass for splatter and clean it so you can see inside without opening the door—every time you open it, heat escapes and cooking time extends.

Weekly deep cleaning of the deck and heating surfaces

Once a week, do a more thorough cleaning of the oven deck (the cooking surface). If your Blodgett has a removable deck, take it out and soak it in hot water with degreaser for 30 minutes, then scrub with a soft brush and rinse completely. If the deck is fixed, use a commercial oven cleaner designed for stainless steel—never use caustic oven cleaners that can damage the metal or leave toxic residue on food-contact surfaces.

Check the heating elements (the rods or coils that glow red when the oven is on) for any visible buildup, rust, or discoloration. Light dust is normal, but caked-on grease or food particles reduce heat output and can cause uneven cooking. Use a soft brush or compressed air to gently remove debris—never touch the elements with a wet cloth or scraper, as this can damage them. If an element looks corroded or cracked, note it and contact a service technician.

Inspect the thermostatic controls and temperature gauges to make sure they're reading correctly. If your oven is consistently running 25 degrees hotter or cooler than the dial shows, the thermostat may need recalibration. This is a job for a professional, but catching it early prevents food waste and customer complaints.

Maintaining convection fans and air vents

If you have a convection model, the fan and ductwork are critical to performance. Every two weeks, check the fan housing and vents for grease, dust, or food particles. A blocked vent forces the motor to work harder, shortens its lifespan, and can cause the oven to overheat in spots. Use a soft brush or compressed air to clean the vents—never spray water directly into the motor or fan blades.

Listen for unusual noises when the oven is running: squealing, grinding, or rattling usually means the fan bearings are wearing out or something is loose inside. Turn off the oven immediately and don't use it until a technician inspects it. Running a damaged fan can spread grease throughout the ductwork and create a fire risk.

If your kitchen has a lot of airborne grease (near a fryer or grill), the convection vents will clog faster. In that case, check them weekly instead of biweekly. Some commercial kitchens install a grease trap or filter on the vent line—if yours has one, clean or replace the filter according to the manufacturer's schedule.

Checking door seals and hinges monthly

The door seal (the rubber or silicone gasket around the frame) keeps heat inside and prevents grease from seeping into the hinge mechanism. Once a month, close the door and look for gaps or light leaking through. If you see daylight, the seal is worn and needs replacement. A loose seal also means the oven has to work harder to maintain temperature, which wastes energy and money.

Check the hinges for rust, loose bolts, or grease accumulation. Wipe them clean with a dry cloth and apply a light coat of food-grade lubricant (not WD-40 or general-purpose oil, which can contaminate food). If a hinge is cracked or a bolt is missing, the door won't close evenly and heat will escape unevenly—this affects cooking and is a safety issue.

Test the door latch by closing it gently and making sure it catches without forcing. If the door swings open on its own or requires excessive pressure to close, the latch or hinges need adjustment. This is usually a quick fix, but ignoring it can lead to burns or dropped food.

Annual professional service and when to call a technician

Schedule a professional service visit at least once a year, ideally during a slower season. A certified Blodgett technician will inspect the heating elements, thermostat, gas lines (if applicable), electrical connections, and safety controls. They'll also clean internal components you can't reach and test the oven's temperature accuracy across all zones. This visit typically costs between $200 and $500, depending on the model and your location, but it prevents costly breakdowns and extends the oven's life.

Call a technician immediately if you notice: uneven cooking (hot spots or cold spots), the oven won't reach temperature, the door won't seal, visible rust or corrosion on heating elements, gas smell (if gas-powered), or any electrical sparks or burning smells. Don't try to repair these yourself—commercial ovens operate at high temperatures and pressures, and improper repairs can cause fires or injuries.

Keep a simple maintenance log: write down the date of each cleaning, any problems you noticed, and when you had professional service. Over time, this log shows patterns (for example, if the thermostat drifts every six months) and helps you plan repairs before they become emergencies.

Preventing grease fires and managing heavy-use environments

Grease buildup is the leading cause of oven fires in commercial kitchens. If your Blodgett sits near a fryer, grill, or other high-heat equipment, grease will accumulate faster. Clean the interior and vents more frequently—every three to five days instead of weekly—and never let grease pool in corners or on the deck. A small fire extinguisher rated for grease fires (Class B) should be mounted near your oven and accessible to all staff.

If you notice smoke coming from the oven during normal cooking, turn it off immediately and let it cool. Smoke usually means grease or food debris is burning on the heating elements or deck. Clean thoroughly before using again. If smoke continues after cleaning, the problem may be inside the ductwork or insulation, and you'll need a technician.

In high-volume kitchens, consider scheduling a professional duct cleaning once or twice a year. Grease can accumulate inside the ductwork where you can't see it, and this is a serious fire hazard. A professional duct cleaning removes buildup and reduces the risk significantly.

Frequently Asked Questions

Can I use a commercial oven cleaner on the inside of my Blodgett?

Yes, but only products labeled safe for stainless steel and food-contact surfaces. Avoid caustic or lye-based cleaners—they can damage the metal, leave toxic residue, and void your warranty. Test any new cleaner on a small, inconspicuous area first. For most daily cleaning, a degreaser and warm water are sufficient and safer.

How do I know if my oven's thermostat is broken?

If the oven consistently runs hotter or cooler than the dial shows (a difference of more than 15 degrees), or if different areas of the oven cook at different speeds, the thermostat may need recalibration or replacement. A professional technician can test it with a calibrated thermometer and adjust or replace it if needed.

What should I do if the oven won't reach temperature?

First, check that the door seals properly and there are no visible cracks in the heating elements. If those look fine, the problem is likely a faulty thermostat, a broken heating element, or a gas/electrical issue. Don't keep trying to use it—call a technician. Continuing to run a broken oven wastes energy and can damage other components.

How often should I replace the door seal?

A door seal typically lasts two to five years, depending on how often the oven is used and how well it's maintained. If you notice gaps, cracks, or the seal no longer springs back when pressed, it's time to replace it. A new seal costs $50 to $150 and takes about 30 minutes to install—much cheaper than the energy waste from a loose seal.

Can I clean the heating elements with water?

No. Water can damage the elements and create a shock hazard. Use a soft brush or compressed air to remove dust and debris only. If an element has heavy grease buildup that won't come off with a brush, call a technician—they have tools and techniques to clean it safely without damaging it.