Think of your furnace like a car: skip the regular checks, and you might find yourself stranded in the cold. Homeowners in Aurora, IL often run into furnace issues that start small and are easy to catch early when you know what to look for. In our service calls throughout Aurora, from the historic homes near downtown and the Fox River to the newer subdivisions along Route 59 near the Fox Valley Mall, we see the same patterns every heating season. Some problems come down to a simple setting, while others call for professional furnace repair before they turn into a no-heat emergency. So, what are the essential things to check to help your furnace run smoothly this winter?
Check the Thermostat Settings
Have you checked your thermostat settings lately?
It’s often the simplest things that cause the biggest headaches with a furnace. Make sure your thermostat is set to “heat” rather than “cool” or “off.” If it’s programmable, confirm that the schedule still aligns with your household’s routine. A stray bump or accidental adjustment can throw everything off.
Next, look at the temperature setting. If it’s set lower than the current room temperature, your furnace won’t turn on at all.
If your thermostat uses batteries, low or dead batteries can disrupt its function and are worth ruling out.
Finally, consider the thermostat’s location. A unit placed near drafty doors, heat sources, or direct sunlight may not read temperatures accurately. Working in homes across Aurora, we often find older thermostats that are poorly located or no longer communicating well with newer equipment. Upgrading to modern thermostats can improve comfort, accuracy, and efficiency. Regular maintenance also helps catch these overlooked control issues before they lead to costly breakdowns.
Inspect the Air Filter
After checking your thermostat, the next thing to look at is the air filter.
A dirty or clogged air filter can greatly impact your furnace’s efficiency and performance. Keeping the filter on a regular replacement schedule helps your system run smoothly and can save on energy costs. Routine professional maintenance adds another layer of protection against unexpected breakdowns.
Here are three compelling reasons to keep your air filter clean:
- Enhanced Air Quality: A clean filter traps dust, allergens, and pollutants, helping everyone in your home breathe easier.
- Increased Efficiency: A clean filter allows for better airflow, so your furnace doesn’t have to work as hard to heat your space.
- Extended Lifespan: Regular filter changes reduce strain on the blower and heat exchanger, helping prolong the life of your furnace.
Not all filters are created equal, and the right choice depends on your system and your household’s needs. Our team can walk you through filters and filtration options that balance airflow with cleaner indoor air. Don’t overlook this simple yet essential part of maintaining your home’s comfort.
Ensure Power Supply Is Stable
Before assuming a more complex issue, confirm that your furnace has a stable power supply. A disrupted power source can lead to unexpected shutdowns or erratic behavior.
Most furnaces have a service switch, often resembling a standard light switch, located on or near the unit. Make sure it’s in the “on” position, since it’s easy to flip off by accident. If your home relies on a generator or backup power system during outages, those should be maintained and functioning correctly as well.
If you notice any damaged, scorched, or frayed wiring, burning smells, or signs of electrical trouble, do not attempt to fix it yourself. Electrical components inside a furnace should only be handled by a trained technician.
Staying alert to power-related symptoms helps avoid unnecessary headaches. If the switch is on and the furnace still isn’t working, it’s time to call a professional for further assistance.
Examine the Circuit Breaker
If your furnace isn’t working, the circuit breaker is another easy thing to rule out.
A tripped breaker could be the culprit, and checking it takes only a moment.
That said, a breaker that trips is often a symptom of a deeper issue. Proper installation and regular maintenance are the best ways to prevent ongoing electrical problems.
Check for Tripped Breakers
One key step in narrowing down a furnace problem is checking for a tripped breaker. Before you panic, take a moment to look at your electrical panel.
Here’s what to look for:
- Visual Inspection: Check whether the breaker labeled for the furnace is in the “off” position or sitting in the middle, tripped position.
- Labeling: Make sure you’ve identified the correct breaker before touching anything.
- Listen for Sounds: If power is restored, listen for normal sounds from the furnace indicating it’s attempting to start.
Reset the Breaker
If the furnace breaker has tripped, it can be reset once by switching it fully off and then back on. If the furnace starts and runs normally, keep an eye on it over the next few days.
If the breaker trips again, stop there. Repeated tripping points to a more significant issue with the furnace, its motor, or the wiring, and resetting it over and over can make the problem worse or create a safety hazard.
If resetting doesn’t solve the issue, or the breaker won’t stay on, call Andersen Plumbing, Heating and AC Repair for expert help.
Our licensed technicians are available 24/7, so your home can stay warm and comfortable even on the coldest nights.
Listen for Unusual Noises
Have you ever stopped to listen to your furnace? Those sounds can tell you a lot about its health. If your furnace is making unusual noises, don’t ignore them. Pay close attention to these warning sounds:
- Banging or Clanging: This could signal loose parts, something striking the blower wheel, or delayed ignition, any of which can indicate a serious issue.
- Squealing or Whistling: These noises often point to a worn belt or motor bearing, or restricted airflow, which can lead to overheating.
- Rattling: Rattling may mean loose panels, screws, or internal components that could become dangerous if not addressed.
Recognizing these noises early can save you from costly repairs and keep your home warm.
Based on what we see in Aurora properties, unusual noises often show up in the first cold snap of the season, when a furnace that sat idle all summer suddenly has to run hard. If you hear anything unusual, it’s best to call a professional. Your furnace deserves attention, and so does your family’s comfort.
Look for Gas Supply Issues
Gas supply problems can also keep a furnace from working properly. In some cases, a gas valve may have been accidentally closed during recent work on the home, such as a remodel or appliance installation. A technician can verify the valve position and gas flow safely.
Most importantly, be alert for signs of a gas leak. If you smell gas, leave your home immediately without using light switches or anything that could create a spark, and call 911 or Nicor Gas from a safe location outside.
If other gas appliances in your home also aren’t working, there may be a supply interruption from your utility. Contacting your gas provider can confirm whether there’s an outage in your area.
Addressing gas supply issues promptly prevents further complications. If you’re uncertain about anything gas-related, don’t hesitate to call Andersen Plumbing, Heating and AC Repair for assistance.
Assess the Pilot Light or Ignition System
A malfunctioning pilot light or ignition system can keep a furnace from starting or staying lit. This can be especially frustrating during an Aurora January, when overnight temperatures regularly dip into the single digits and below.
Here’s what professionals look at when assessing the situation:
- Pilot Light: On older furnaces with a standing pilot, a technician will check whether the pilot is lit, whether the flame is steady and properly colored, and why it may have gone out.
- Ignition System: On newer furnaces with electronic ignition, a technician will verify that the igniter and flame sensor are working and read any diagnostic codes shown by blinking lights on the control board.
- Blockages: Dust and debris can interfere with the pilot, igniter, or flame sensor. A technician can clean these components without damaging them.
Because these parts involve gas and combustion, attempting repairs yourself can be dangerous. If your furnace isn’t igniting or keeps shutting off, reach out to a professional. Your comfort and safety are important, and getting your furnace running properly should be a priority.
Keep the Furnace and Vents Clean
While you may not think about it often, keeping your furnace and vents clean is essential for efficient operation and healthy indoor air.
Dust, dirt, and debris can accumulate over time, restricting airflow and causing your system to work harder than necessary. This not only reduces efficiency but can also lead to more significant issues down the road.
Homeowners can help by keeping supply and return vents free of furniture, rugs, and other obstructions, and by keeping the area around the furnace clear and clean.
Cleaning inside the furnace itself, including the blower assembly, burners, and other components, should be left to a trained technician during a maintenance visit. These parts are sensitive, and some involve electrical and gas connections that should not be disturbed by an untrained hand.
Keeping your furnace and vents clean improves performance, prolongs the life of your system, and contributes to better indoor air quality.
Verify the Drainage System
High-efficiency furnaces produce condensation, and a healthy drainage system is essential to keep them running smoothly.
Blockages, condensate pump problems, and clogged drain lines can all cause a furnace to shut down or leak.
Here’s what to know about each.
Check for Blockages
A clogged drainage system can lead to inefficient operation, safety shutdowns, and costly water damage. During service visits, our technicians inspect the drain lines for obstructions.
Here are three common blockages we find:
- Debris and Dust: Dust and debris can accumulate and obstruct water flow.
- Ice Buildup: During Aurora’s coldest stretches, condensate lines routed through unheated spaces or outdoors can freeze and prevent proper drainage.
- Algae and Sludge Growth: When water isn’t draining properly, biological growth can form and cause further clogs.
Inspect Condensate Pump
Many furnaces rely on a condensate pump to move excess water to a drain. Homeowners can watch for warning signs such as water pooling around the pump or furnace, a pump that runs constantly, or a furnace that shuts off unexpectedly.
During a professional inspection, a technician checks the pump’s power, float switch, and discharge line, and looks for signs of damage or leaks. If the pump is failing, it can be repaired or replaced before water backs up into the furnace or onto your floor.
Regular condensate pump inspections help maintain your furnace’s efficiency and prevent water damage in your home.
Keep Drain Lines Clear
Keeping your furnace’s drain lines clear is essential for efficient operation. Clogged drain lines can lead to water damage and furnace malfunctions, so including them in routine maintenance is vital.
Here are three reasons this matters:
- Prevent Costly Repairs: Clear drain lines help you avoid unexpected expenses down the road.
- Enhance Efficiency: A properly working drainage system allows your furnace to run smoothly, improving overall performance.
- Ensure Safety: Clogged lines can cause water backups and safety shutdowns, leading to hazardous conditions in your home.
Schedule Professional Maintenance
Scheduling professional maintenance helps your furnace operate efficiently and reliably throughout the colder months. Regular check-ups by experienced technicians can catch potential issues before they escalate into costly repairs.
During a furnace maintenance visit, your system is cleaned, inspected, and tuned up, which enhances its efficiency and extends its lifespan.
Consider enrolling in a membership plan, like the one offered by Andersen Plumbing, Heating and AC Repair, for ongoing savings and scheduled maintenance. This way, you can enjoy peace of mind knowing your furnace is well cared for year-round.
Plus, with 24/7 emergency service, you’re covered in case of an unexpected breakdown.
Don’t wait until winter’s chill sets in to think about your furnace. A well-maintained system keeps your home warm and helps you save on energy bills.
Trust the experts to keep your system in top shape, ensuring comfort for you and your family.
Staying Warm and Worry-Free This Aurora Winter
Keeping these tips in mind can help your furnace run smoothly and efficiently all winter. Many homeowners overlook simple checks, like confirming thermostat settings or changing air filters, believing they’re too minor to matter. In reality, these small habits can make a real difference in your furnace’s performance and lifespan, while professional care handles the technical work safely. Don’t underestimate the value of preventative care. If your furnace is acting up or hasn’t been serviced this season, book an HVAC inspection and keep your Aurora home cozy all winter long.