01
Burnt Food and Grease
Old spills, cooking fat and food residue can smoke whenever the oven reaches a high temperature.
Advice Based on 15+ Years of Oven Cleaning
Why Is My Oven Smoking?
An oven may smoke because grease, food or cleaning residue is burning inside it. However, the cause can also be hidden above the upper grill element or behind the rear backplate around the fan and circular heating element.
- Hidden grease above the grill
- Residue behind the backplate
- Cleaning problem or appliance fault?
Important: if there is heavy smoke, visible
flames, an electrical smell, sparks or power problems, switch
the appliance off and arrange an appropriate inspection.
Smoke is commonly caused by grease, food residue or hidden build-up becoming hot inside the oven.
Quick answer
The Most Common Reasons an Oven Smokes
An oven normally starts smoking when grease, food residue or cleaning product is heated. However, some smoke can also be caused by an electrical or mechanical fault that needs an appliance engineer.
Why is my oven smoking?
In our experience, the most common cause is burnt-on grease in an area that is difficult to see. This may be on the oven floor, above the grill element, behind the rear backplate or around the fan and circular heating element.
02
Grease Above the Grill
Fat can collect on the oven roof and around a top grill element, particularly when the grill is rarely used.
03
Grease Behind the Backplate
Hidden deposits behind the rear panel may heat up around the fan and circular element, producing smoke and unpleasant smells.
04
Cleaning Product Residue
Oven cleaner that has not been completely removed can produce smoke or a chemical smell when the appliance is heated.
05
A New or Recently Repaired Oven
A new component or protective manufacturing residue may create a temporary smell. Always follow the manufacturer’s instructions.
06
An Electrical Fault
Damaged wiring, a failing heating element or another appliance fault can create smoke that cleaning will not solve.
Stop using the oven if the smoke is thick or smells electrical.
Switch the appliance off and allow it to cool. If you notice sparks, burning plastic, damaged wiring or continuing smoke from an electrical component, contact a qualified appliance engineer.
The solution
How to Clean Above the Oven Grill Element
Removing the grease from the oven roof can stop smoke caused by hidden cooking deposits. However, the grill element must only be moved when it is designed to lower and the manufacturer’s instructions allow it.
1
Switch Off and Cool
Disconnect the power where possible and wait until the oven and element are completely cold.
2
Check the Element
Confirm from the appliance manual whether the grill element is hinged or designed to lower for cleaning.
3
Clean the Oven Roof
Carefully remove the softened grease and burnt-on residue without soaking or damaging the heating element.
4
Rinse and Dry
Remove all cleaning-product residue, dry the area and return the element to its correct position.
What we commonly find during oven cleaning
The visible part of the oven may look clean, but once a movable grill element is carefully lowered, there can be a thick layer of grease on the roof above it. Cleaning this overlooked area can make a major difference when an oven repeatedly smokes from the top.
Safety: Never pull, bend or unscrew a fixed heating
element. If access requires dismantling the appliance, use a suitably
experienced oven cleaner or qualified appliance engineer.
Grease can remain hidden behind the oven’s rear backplate.
Common cause 02
Grease Hidden Behind the Oven Backplate
The rear backplate is another area that people cannot normally see. Grease, food residue and cleaning products can pass through its vents and collect around the fan and circular heating element.
Why can this make an oven smoke?
When the fan oven is switched on, the circular element behind the backplate becomes extremely hot. Grease or cleaning-product residue around this area can begin to heat, smell and smoke, even when the visible part of the oven looks clean.
- ✓ Smoke may appear mainly when the fan-oven setting is used.
- ✓ The smell may seem to come from the back of the oven.
- ✓ The oven may continue smoking after its visible surfaces have been cleaned.
- ✓ Cleaning-product residue may create an unpleasant chemical smell.
What we find during deep oven cleaning
When we remove the rear panel, we often find grease on the backplate, around the fan and close to the circular element. We also sometimes find cleaning product that has passed through the vents and was not properly removed.
Safety: Switch off the electrical supply and allow the
oven to cool completely. Only remove the backplate when the appliance
instructions permit it. If the element, wiring or fan appears damaged,
contact a qualified appliance engineer.
Cleaning the hidden area
Cleaning the Fan and Circular Element Area
Once the rear backplate is safely removed, the fan blade and the area surrounding the circular heating element can be inspected. This is where hidden grease, burnt food residue and traces of oven cleaner may be found.
1
Rear Backplate
Grease and residue are removed from both sides of the panel and from its ventilation openings.
2
Oven Fan Blade
Built-up grease is carefully cleaned from the fan blade without damaging or bending it.
3
Rear Oven Wall
Deposits hidden behind the panel are removed and the surface is thoroughly wiped and dried.
4
Circular Element Area
The area around the heating element is inspected for grease, residue and signs of damage.
Why cleaning this area can stop the smoke
The fan circulates hot air around the oven. If the fan blade, backplate or surrounding surfaces are greasy, heat and moving air can create smoke and spread the smell throughout the oven cavity. Removing these hidden deposits addresses the source rather than only cleaning what can be seen.
Important: The oven must be switched off, electrically
isolated and completely cold. A fan blade or backplate should only be
removed when the appliance instructions allow it. The circular heating
element must not be sprayed, soaked, pulled or bent. Damaged elements,
wiring or fan components should be checked by a qualified appliance
engineer.
Cleaning the oven fan, rear panel and surrounding circular element area.
Removing heavy grease and burnt-on food can stop smoke caused by a dirty oven.
Common cause 03
Can a Dirty Oven Cause Smoke?
Yes. Heavy grease, cooking fat and burnt food are among the most common reasons an oven starts smoking. The deposits become hot every time the oven is used and may eventually begin to burn.
Where does the smoking grease collect?
Grease can build up on the oven floor, walls, roof, door edges, trays, side racks and around heating components. Some deposits are easy to see, while others remain hidden underneath removable parts.
Food Spills
Sauces, cheese and food dropped onto the oven floor can burn during later cooking.
Cooking Fat
Fat from roasting can splash onto the walls, roof, racks and heating areas.
Burnt-On Carbon
Repeated heating turns older grease into hard, dark deposits that can produce smoke and odours.
Dirty Trays and Racks
Greasy oven trays, shelves and side racks can continue smoking even after the oven walls are wiped.
The safest solution is a thorough clean
Allow the oven to cool completely, remove loose food and clean all permitted removable parts. Any cleaning product must be thoroughly rinsed away before the oven is used again. Heavy grease should be removed rather than deliberately burnt off using high heat.
If the smoking continues: Stop using the appliance if
a thoroughly cleaned oven continues to smoke, particularly if there is
an electrical smell, sparking or unusual noise. These signs may require
inspection by a qualified appliance engineer.
What should you do next?
Do You Need an Oven Cleaner or an Appliance Engineer?
The correct solution depends on whether the smoke is coming from grease and residue or from an electrical or mechanical fault.
Stop using the oven if you suspect an electrical fault
Switch the appliance off and isolate its electrical supply where it is safe to do so. Do not continue testing an oven that is sparking, tripping the power or producing a burning-plastic smell.
How to Help Prevent Your Oven from Smoking
Clean Fresh Spills Remove food spills after the oven has cooled before they become
burnt-on deposits.
Check Hidden Areas Do not forget the oven roof, grill area, backplate, racks and trays.
Remove Product Residue Thoroughly rinse and dry accessible surfaces after using an oven
cleaning product.
Use the Grill Carefully If it is clean and working correctly, use the grill occasionally in
accordance with the manufacturer’s instructions.