Space Heater Making Noises? (Crackling, Clicking, Humming, & More Explained!)

Space heaters, while efficient in providing warmth, can occasionally produce various noises during their operation. Recognizing these sounds and understanding their causes is crucial for both safety and optimal functioning.

It is normal for a space heater to make certain noises during operation as mechanical parts move and temperature changes cause certain elements to expand or contract. Constant screeching or squealing, rattling, or popping could be a sign of a mechanical issue that needs to be fixed.

Read on to learn more about warming your house this winter!

8 Common space heater noises – causes and quick solutions

Below is a breakdown of common noises space heaters make and their likely reasons, along with suggested solutions:

Crackling Noise

A crackle noise coming from a space heaters often results from the heater components heating up, causing tension within the materials.

• Possible Causes: Dirty filter, blocked vents, or tension release from expanding components.
• Solution: Clean or replace the filter, ensure no obstructions near the vents, and recognize this noise might be a natural occurrence of the heater operation.

Clicking Sound

Click sounds coming from a space heater are usually due to the expansion and contraction of materials inside the heater.

• Possible Causes: Temperature fluctuations or the resettling of internal materials after tension release.
• Solution: Store the heater in a warm location and ensure it’s properly assembled.

Humming Noise

A hum or whir noise is generally linked to the motor or fan of the space heater.

• Possible Causes: Normal operation or issues with the motor/fan components.
• Solution: If humming is excessive and sounds like a roar, check for loose parts, tighten them, or consult a professional.

Screeching or Squealing Noise

Screeching noises coming from a space heater might suggest electrical complications but it could also be caused by friction as metal parts move against each other.

• Possible Causes: Electrical issues or damaged cords.
• Solution: Turn off the heater, inspect cords and plugs, and if required, seek professional assistance or consider replacement as electrical issues a concern that can’t be avoided.

Rattling Noise

Rattle noises generally indicates potential loose components or debris that move around with the vibration of the space heater’s motor.

• Solution: Inspect and secure any loose parts or clean as necessary.

Buzzing Noise

A buzz sound might point towards electrical problems in the system.

• Possible Causes: Loose connection or a faulty component.
• Solution: Ensure tight connections and, if uncertain, consult an expert.

Popping Sound

A pop, snap, clank, or thump are often heard during sudden temperature changes within the heater.

• Possible Causes: Normal contraction of materials when the heater cools down.
• Solution: Recognize it as a general sound during the heater’s operation.

Sizzling Sound

A sizzle, whoosh, or hiss suggests the presence of moisture.

• Possible Causes: Moisture or condensation build-up inside due to temperature fluctuations.
• Solution: Store the heater in a dry, warm place.

For optimal performance and safety, maintain regular inspections of your heater. If you’re ever in doubt about any noise or its remedy, prioritize safety and seek professional guidance.

Where do the noises come from on a Space Heater?

Heating element: The heating elements in your space heater can be a source of crackling noise. Over time, these elements can become damaged or warped, leading to small gaps that create noise as they heat up and cool down.

Fans: The fan inside your space heater can contribute to noise production. Dust or debris caught in the fan blades can cause a crackling sound as the fan spins. Regularly inspect the fan for any buildup and clean it as needed.

Motor: The motor that powers your space heater’s fan can also cause noise. If the motor is worn or damaged, it might create a buzzing or humming sound. Checking the motor for any signs of wear helps to maintain a quiet heater.

Screws and Vents: Loose screws or vents can cause a space heater to produce a clicking noise. Make sure all screws are tight, and that vents are free from blockage to minimize noise from this source.

Thermostat: The thermostat in your space heater may also cause a crackling noise, particularly when it cycles on and off. Ensure that the thermostat is functioning properly to avoid unnecessary noise.

Ducts: In some types of space heaters, especially those with forced air systems, the ducts can create crackling or popping noises due to metal expansion and contraction during temperature fluctuations.

Wires, Transformer, and Relay: Electrical components such as wires, transformers, and relays may emit buzzing or humming sounds if they are damaged or not functioning properly. Regularly inspect these components for any signs of wear or damage to keep your space heater running quietly and safely.

Repair and Replacement Process for Noisy Space Heaters

If you notice your space heater making a crackling noise, there are several steps you can take to troubleshoot and repair the issue. Before attempting any repairs, make sure to unplug the heater and allow it to cool down.

1. Check the filter: A dirty filter can cause your heater to produce unsettling sounds. To resolve this, clean or replace the filter as necessary. This is an essential maintenance step to ensure the longevity of your heater.
2. Inspect the area around the heater: Ensure that nothing is blocking the heater’s vents, as this may lead to obstructed airflow and result in crackling noises. Clear any obstructions to prevent further issues.
3. Examine cords and plugs: Damaged cords may cause the heater to emit noise. Check for any visible signs of wear and tear. If there is damage, consider replacing the cord or seeking professional assistance.
4. Assess internal components: For more complex issues, such as problems with the thermostat or heating element, you may need to consult a professional technician. If you’re confident in your ability to safely disassemble and troubleshoot the heater, do so with caution.
5. Replace if necessary: If the source of the noise cannot be resolved or the damage is beyond repair, replacing the heater may be the best option. Before purchasing a replacement, research the most suitable and energy-efficient options for your needs.

Regular maintenance and proper usage of your space heater will extend its lifespan and ensure optimal performance. By following these steps, you can address the noise issue and enjoy a comfortable, warm environment.

Potential dangers related to space heater noises

Noisy space heaters can pose some dangers if not promptly addressed. When your space heater makes a crackling noise, it could indicate a build-up of dust and dirt on the heating elements. Over time, dust and dirt accumulation can cause the elements to become less efficient and even lead to premature failure.

An old, faulty space heater can become dangerous. The internal components may deteriorate, increasing the risk of overheating. If your space heater is overheating, it might also increase the likelihood of a power surge, which can result in an electrical arc and, in some cases, a fire.

With these dangers in mind, it is essential to take the following precautions to minimize the risks associated with noisy space heaters:

1. Clean dust and dirt regularly: Remove the heating elements from the heater and wipe them down with a damp cloth to maintain efficiency and prevent early failure.
2. Inspect the heater for signs of wear or damage: If your space heater is old, inspect for worn-out components and replace them as needed to ensure safety.
3. Monitor overheating: Keep an eye out for signs that your space heater is overheating and unplug it immediately if you notice any unusual heat or other safety concerns.
4. Use a surge protector: Use a surge protector to reduce the chances of a power surge that could lead to an electrical arc and potential fire hazard.
5. Follow manufacturer safety guidelines: Always follow the safety guidelines specified by your space heater’s manufacturer.

By following these tips, you can minimize the dangers associated with noisy space heaters and ensure a safer and more comfortable heating experience.

How to prevent space heater noises

To keep your space heater running in a safe and comfortable manner, regular maintenance is essential. Here are a few preventive measures that will help reduce the occurrence of crackling noises from your space heater.

First, ensure that you clean the filter regularly. A dirty filter can cause crackling noises in your space heater. Check the filter and clean or replace it as needed, following the manufacturer’s instructions.

Next, pay attention to the area surrounding the space heater. Keep the area around the heater clear to prevent anything from blocking the vents. Blocked vents can lead to crackling noises, so make sure there are no obstructions near your heater. This will also help maintain safe and efficient operation.

Proper maintenance of your space heater is crucial. Inspect the cords and plugs for any signs of damage, and tighten any loose parts, as rattling indicates their presence. If you have an oil-filled radiator, ensure the oil is at an appropriate level. Regularly check the oil, and top it off as necessary to maintain your radiator’s performance.

Oil-filled radiators tend to have fewer issues with crackling noises, as they operate without the use of fans. Consider investing in an oil-filled radiator for a quieter and more efficient heating option for your home.

By following these preventive measures, you can ensure that your space heater functions efficiently while reducing any unwanted crackling noises and maintaining a comfortable environment in your home.