Despite our long summer, winter appears to have arrived in a hurry. Suddenly the furnace is your favorite appliance in the house. When problems arise, you know it right away.
Keeping your home warm is a combination of regular maintenance and knowing the symptoms of a furnace problem. You can start today by educating yourself about the most common furnace repairs and problems, as well as how to spot them.
Cleaning Dirty Ductwork
As simple as this repair may seem, it's an important one everyone needs to know about. Every once in a while, dust and debris can get into your heating ducts. That limits the amount of hot air you receive.
If you've noticed that your furnace doesn't seem to be heating the house as well as it once did, your ductwork could use a cleaning session. You can check the airflow by placing your hand in front of your vents and feeling the amount of air that is coming out.
To prevent future problems, you should get on a regular maintenance plan with an HVAC technician you trust. We'll be able to clean out your ductwork and the rest of your HVAC system so keep your heat up and running.
Your furnace has a filter that keeps your air clean and keeps your ductwork cleaner as well. Your filter blocks dirt, allergens, pollutants, and other hitchhikers in the air.
While most homeowners know about furnace filters, they don't know how often to change their filters. It depends on the filter itself, but you should replace most filters every month or two. Check your filter's packaging for a more specific timeline.
A key sign that you need to replace your filter is that your furnace may not heat the air as well as expected. If your furnace seems to be working harder than it should be, that could signal a filter change too. This happens because the filter is full and the furnace is struggling to get air through it.
Fixing the Starting Mechanism
Each furnace has a mechanism to jumpstart the heating cycle. The type of mechanism depends on the furnace itself.
In older furnaces, this is usually a pilot light. Newer furnaces typically use electrical ignitions instead of pilot lights.
Regardless of your furnace, the ignition or the pilot light can fail and we may need to replace it or repair it. In some cases, your furnace may stop turning on and heating the home when your ignition or pilot light has a problem.
You may be able to see the pilot light inside the furnace. Regardless, though, if your furnace isn't turning on when it should, it's worth a call to an HVAC technician.
Replacing Blower Bearings
Your furnace has a blower mechanism, which blows the heated air into the ducts so it warms your home. One part of that blower mechanism that can fail is the set of ball bearings.
Over time, ball bearings can develop wear and tear. They can also sustain damage if they're installed incorrectly.
The key sign of a problem with your blower bearings is a scraping sound coming from your furnace. If you hear this sound, contact an HVAC repair specialist right away so we can replace your bearings.
Keep in mind that as you continue running your furnace, you'll damage the bearings further. It's a good idea to turn off your furnace to prevent the problem from getting worse.
Replacing the Heat Exchanger
You probably haven't heard of it before, but trust us: you're grateful for your furnace's heat exchanger.
The heat exchanger is a coil of heated tubes. Your furnace pushes air through these heated tubes to warm the air before pushing that warm air into your home. In other words, this is where all the heat comes from in your furnace.
With the amount of heat those tubes handle, though, you need to keep up with regular furnace maintenance to keep them in good shape. If you don't, they can crack or have other malfunctions.
When this happens, our technicians will most likely need to replace your heat exchanger. This is one of the more expensive repairs you could need, but it's less expensive than buying a new furnace.
If you notice that you're getting air out of your vents but it isn't very warm, the heat exchanger may be the problem.
Fixing or Replacing the Blower Belt
We mentioned earlier that your furnace uses a blower to push the heated air into your home. The ball bearings are far from the only part of that blower that can break.
One common issue is a problem with the belt for your blower fan. You'll know this is happening when you hear a high-pitched squeal from the furnace.
There are multiple things that can go wrong with your blower belt. The belt can slip out of place, and an HVAC technician may only need to put it back in place.
In other cases, your blower belt suffers from wear and tear over time. If that happens, we will likely need to replace the belt.
Either of these problems can make your furnace less efficient. You won't get the heat you need but you'll also be paying a high energy bill for your inefficient furnace.
Fixing the Limit Switch
The limit switch is a part of your furnace that not only makes sure the furnace is running well, but it keeps you safe too.
A limit switch detects the heat within the furnace. Responding to that temperature, it tells the blower fan when to turn on and off.
On top of this, the limit switch can tell when your furnace is getting dangerously hot. It will shut off the furnace's burners to prevent potential fires, severe furnace damage, and other important dangers.
One of the most common signs that your limit switch is malfunctioning is that your furnace will keep running continuously when it shouldn't. While this might not seem serious at the time, it can leave you vulnerable to dangerous problems because the limit switch won't turn off an overheating furnace.
In this case, call an HVAC technician to either repair or replace the limit switch.
Repairing Your Thermostat
In some cases, the problem with your furnace isn't a problem with the furnace at all.
In most cases, your thermostat detects the temperature in your home. Based on that, it tells the furnace when to start a heating cycle.
A malfunctioning thermostat could pick up the wrong temperature. This leads your furnace to either produce heat you don't need or to stop producing heat when your room is cold.
Your thermostat may also have a problem with the messages it sends to the furnace. The electrical system can have issues at any time.
An HVAC technician will be able to examine your thermostat and determine if there is an issue with the software or the hardware. We'll be able to either get your thermostat back up and running or replace it with a functioning one.
One of the most noticeable signs of problems with your furnace is a series of unpleasant noises. These can range from clunking to thumping to squealing and more.
As we mentioned above, a squeaking noise often mans a blower belt problem. A scraping noise tends to signal damage to your blower bearings. A clunking noise, on the other hand, has more possibilities.
Furnaces are full of various mechanical parts that could break or become loose at any time. In these cases, the only way to track down the problem is for a specialized technician to take a look. To make sure you aren't at risk for a fire or further damage, try to turn off your furnace until your service call.
Identifying the Common Furnace Repairs Your Home Needs
When there's a nip in the air outside, your home should be a warm and welcoming place of comfort. A malfunctioning furnace can take away that comfort in a hurry.
By learning about the common furnace repairs above, you can know what to look for and narrow down what may be wrong with your furnace. You can also recognize the importance of an ongoing furnace maintenance program during the warm months and cold months alike.
Keep in mind that the information above is a mere guideline. The only way to know for sure what is causing problems with your furnace is to call an HVAC technician to examine it with a trained eye. We can help you prevent serious problems or even safety risks by resolving your furnace problems quickly.
If your furnace needs some TLC, call our HVAC technicians for service.
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