Woman warming her hands on a heater, using a blanket.

If you have experienced a heater that smells like burning, you may wonder why this happens and whether it is cause for concern. In this blog post, we will explore the possible reasons and provide some steps you can take to address the issue.

Heaters, electric, gas, or oil-based, can produce a variety of smells depending on the type and condition of the unit. A burning smell from the heater is the most common odor, and while it can be alarming, the cause of this smell is not always something that requires immediate action.

Why Does My Heater Smell Like Burning? 4 Causes And Solutions

From dust to faulty components and oil buildup, there are several reasons why your heater might give off a burning smell, and they are not all related to a malfunction or serious issue. So here is why your heater smells like burning and what to do:

1. Dust Buildup

Dust can accumulate outside and inside the unit when a heater is not used for a while. When turned on, this dust begins to burn off, causing the heater to smell like burning when first turned on. This issue is particularly common with electric heaters or space heaters.

If you have not used your heater for a while, clean it before turning it on or allow it to run briefly to burn off the dust. 

2. Heater Smells Like Burning Plastic

Another common reason for a burnt smell is overheating. If a part of the heater, such as the plastic casing or wiring, becomes too hot, it can emit a smell that resembles burning plastic. A faulty or damaged component inside the heater can cause it.

If you smell burning plastic, turn off the heater immediately and unplug it from the power source. Inspect the unit for visible damage or melting. If you find damage, it may be a sign to replace the furnace or have it repaired by a professional.

3. Oil Or Grease Buildup

For those who use oil-filled space heaters, another common cause of a burning smell is oil residue that may have accumulated in the unit. This is especially true if the heater has been used for a long time without proper maintenance.

Check the heater for signs of oil leaks or buildup. Wipe down the unit with a soft cloth to clean it. If the smell persists, you may want the heater serviced to ensure it functions safely.

4. Malfunctioning Heater Components

If the smell from the heater is persistent and does not disappear, it could be a sign that one of the internal components of the heater is malfunctioning. This could include the heating element, thermostat, or internal wiring. Over time, these components can wear out or become damaged, leading to potential overheating or electrical issues.

If the smell does not go away or gets stronger over time, it is advisable to turn off the heater and have it professionally inspected. Malfunctioning components can pose a fire risk, so it is best not to continue using the unit until the problem has been addressed.

While minor smells, like burning dust, can be a common heating problem and are usually nothing to worry about, there are instances when you should take further action.

Call a professional if your heater smells like burning plastic, has a persistent or worsening odor, or shows signs of overheating or malfunction. A certified technician can diagnose and safely repair the heater.

Come on over to Wisercosts heating experts, get a free quote, and find out once and for all why your heater smells like burning and the best ways to fix it!