Why Is My Heater So Loud? 6 Surprising Reasons!

Do you wish to learn why is my heater so loud? Don’t worry, as you have arrived at the right place at the right time. Whenever you switch on the heater, you may hear loud screaming & rattling sounds from the blower motor’s joints or even the blower motor itself.

That heated air from the heater is forced out via the ventilation ducts in the home by the blower motor. To maintain performance and operation over time, the blower motor requires regular maintenance, generally with a particular subset of lubricant. Instead, the fan may seize up, resulting in a loud noise.

Several reasons might cause a heater to make loud noises. Scratching, slamming, screaming, or cracking noises might indicate a loose component, damaged heat exchanger, or unclean gas burners. Keep reading to learn more.


Why Is Your Heater So Loud?

The loud heater has a faulty blower motor, a loose blower belt, and dirty gas burners. We will discuss such an issue in detail so you will come to know why is my heater so loud.


#1. Clogged heater air filter

The most direct cause for screaming or screaming would be that the air filter is blocked with dirt, fluff, and dirt. The creepy shriek you hear may be merely air attempting to get through. Luckily, users can solve the noise problem fast and cheaply by themselves. If you’re using disposable filtration, swap out the old ones for new ones. When you do not have an extra disposable, replacing the old one is preferable.


#2. The blower motor is faulty

Another cause of screaming noises is the blower motor, which is the form of energy for the blower which pushes heated air via the ductwork to warm the house. To execute its function efficiently, the blower motor needs enough oil. The blower motor may harm the heater because it runs out of oil.


#3. Faulty blower wheel

Metal-on-metal clanking or scrapping indicates a significant issue with the heater blower wheel. The blower fan has likely gone loose and is making the noise by colliding with the blower house covering. The metal-scraping sound must be handled as soon as possible, and a professional HVAC specialist should be called in. Whenever you notice a metal-on-metal sound, switch off the heater right once and call a trained HVAC professional for a thorough evaluation. When you hear loud metal-on-metal or scratching noises, turn off the heater. It may be helpful to read about typical carrier furnace blower motor replacement cost.


#4. The blower motor belt is loose

A screeching or similar sound might occur if the heater blower belt gets loose. Dry shaft joints and other rotating elements are yet another cause of screaming. A trained technician greases rotating heater components during bi-annual tune-ups to ensure that the heater operates at top efficiency throughout the wintertime. The blower belt will have to be modified or changed over time. Although you may adjust the fan belt yourself, you must never try to repair a broken blower belt on your own. It’s recommended to have the fan belt inspected by an expert who can make any required adjustments, repairs, or replacements.


#5. Clogged burner

Users might hear a loud blast or boom whenever you switch on the heater if the burners are unclean and have to be wiped. Dirty burners might produce start-up time, which is harmful. Whenever the ignition gets switched on after a delay in the ignition, gas builds up and goes “bust” or “blow up.” That problem would be kept at bay by regular inspections & cleanings. Every heater burner is examined and cleaned as part of the professional tune-up.

An uneven air-to-fuel ratio is another source of a loud blast or explosion which resonates all through the house. The heater requires a correct blend of air & gas to function quickly and successfully. Gas may start building up when there is too much air and not enough gas, leading to loud booming noise. You’ll need an expert to assess the problem and make the necessary cleaning and modifications, whether you have unclean heaters or an imbalanced air-to-fuel ratio.


#6. Broken heating element

When you notice rattling sounds emanating from the heater, it might signal a loose screen or bolt. You may solve the problem manually by shutting off the electricity to the heater at the origin. You may then tighten the panel using a screwdriver. This may stop the rattling. Also, double-check that the access plate is completely locked. If somehow the rattling is caused by something other than a loose screw or perhaps an accessible panel, it’s significantly more severe and hazardous. A malfunctioning heat exchanger may cause shaking. A heat exchanger could be leaking or cracked.

Insufficient ventilation is among the most common reasons for a damaged heating element. Heat may start building up inside the heat exchanger if ventilation is hindered by filthy filtration, fans, and coils, which are prone to breakage and splinters. This occurs whenever the heater has indeed been ignored for a long time.


It’s A Wrap!

We are happy to know that you have learned why is my heater so loud. Various reasons cause your heater too so loud. If you find any of one issues mentioned above, you should fix them to avoid the bad loud sound. Read related articles; know what heater to buy and what kind of heater do i have. Thank you, friends, for staying with us. 

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