“I heat with a pellet stove, it’s freezing cold outside and suddenly the power goes out. What now? Will the stove switch off by itself? And won’t the smoke get into the room?”
This is a question that every owner of an automatic pellet stove should ask themselves, ideally before the first power outage.
Most conventional automatic pellet stoves require electricity not only for ignition, but also for controlling combustion and for removing exhaust gases.
So what exactly happens if the power goes out in the middle of the heating process?
What gets stuck in the oven first?
In the event of a power outage, the electrically operated components of conventional automatic pellet stoves will no longer function.
This means above all:
- Pellet conveyor – stops supplying new fuel to the burner.
- Exhaust fan – It stops the active removal of flue gases.
- Warm air fan – If the oven has such a feature, the heat distribution in the room is adjusted.
- Electronic control Without an emergency power supply, neither the display nor the automatic control system will function.
However, the pellets that are already burning in the burner do not go out even in the event of a power outage.
They can continue to burn or glow for some time.
Therefore, a power outage is not the same as simply switching off the stove.
Can exhaust fumes enter the room during a power outage?
Yes, under certain circumstances that is possible.
In normal operation, the exhaust fan helps to carry the exhaust gases into the chimney.
Once the fan stops, further exhaust gas removal depends, among other things, on the natural draft of the chimney, the design of the stove and the conditions in the building.
If the flue gas extraction is insufficient, some of the smoke or flue gases may enter the room.
Carbon monoxide (CO) is particularly dangerous because it is colorless and odorless, so you may not even notice its presence.
A functioning chimney alone is no guarantee that exhaust fumes will not escape in the event of a power outage.
Therefore, it is important to have a professionally installed and regularly maintained oven, a sufficient exhaust path, and a functioning carbon monoxide detector.
What should I do if the power goes out during the heating process?
Above all: Stay calm and follow the safety precautions.
- Do not open the firebox door or the pellet hopper. Opening the door can disrupt combustion conditions and allow smoke to escape.
- Do not attempt to remove the burning pellets by hand or extinguish them with water.
- Do not pull unnecessarily on the power cord and do not tamper with the electrical installation of the stove. After power is restored, the device may need to go through a safety or post-cooling cycle.
- Watch out for smoke leaks or the activation of the carbon monoxide detector.
If smoke appears in the room, a carbon monoxide detector sounds an alarm, or you suspect an exhaust leak, leave the building and call the fire department from a safe place on 150 or 112.
Do not return inside until the area is safe.
The exact procedure in the event of a power outage must always comply with the instructions of the manufacturer of the respective oven.
What happens when the power comes back on?
There can be quite large differences between the individual ovens.
Some models can survive a brief outage and continue to function.
Others, after restoring power, first start the fan, perform a function test, and then switch to ignition or shutdown mode.
Other stoves may display error messages.