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You rely on your furnace when it’s chilly outside to keep your home warm and cozy. Winter can be brutally cold, and the last thing you want is your heating system breaking down when you need it most. If you’ve noticed uneven heating throughout the home, strange noises coming from the system, or frequent on-and-off cycling, it means your furnace is struggling. Here at Service Hero, we’ve seen it all when it comes to furnace issues. From blower motor issues to ignition issues, worn-out components, faulty thermostats, duct issues, and more. Our team takes pride in offering reliable furnace repair services. Today, we’ll explain why your furnace might be struggling.
We had a main line drain clog under the house. Russell was our technician and approached the problem from outside the house, working retrograde from a trap in the front yard. I was skeptical but it worked when my efforts with a cable inside the house had failed. He was very professional and pleasant to deal with. We asked him to install a cleanout closer to the house for future use and we were very satisfied with the work.
Overall, It was a very good experience with the Service Hero team. I was able to schedule an appointment late in the night. They are truly 24x7. The help desk team was very professional, courteous, and friendly. All responses were timely. The field technician showed up on time and diagnosed the issue accurately. Kudos to the Service Hero team!
One of the most overlooked causes of furnace trouble is a dirty air filter. When filters become clogged with dust, pet dander, and debris, airflow is restricted. This forces the furnace to work harder to push warm air through your home. This usually leads to overheating, short cycling, and higher energy bills. In severe cases, a blocked filter can cause the system to shut down completely. Changing your filter every 1–3 months is one of the simplest ways to ensure efficient furnace performance in winter.
Many homeowners assume furnace problems stem from the unit itself when the real culprit is the thermostat. A malfunctioning thermostat may send incorrect temperature readings, fail to signal the furnace to turn on, or cause uneven heating. Dead batteries, old wiring, or outdated models can all contribute to erratic furnace behavior. Replacing batteries or upgrading to a programmable thermostat often solves the issue.
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Modern furnaces rely on electronic ignition systems, while older units use a standing pilot light. When these components fail, the furnace may struggle to produce heat or fail to ignite altogether. Cold winter conditions can make ignition problems worse, especially if the furnace is older or poorly maintained. A flickering or yellow pilot flame may also signal a dangerous carbon monoxide issue, which requires immediate attention by a heating repair specialist.
If your furnace is running but your home still feels cold, poor airflow may be to blame. Closed or blocked vents, dirty ductwork, or failing blower motors can all reduce the amount of warm air circulating through your home. In winter, furniture is often moved around, and vents may accidentally become obstructed. Ensure vents are open and ducts are clean to improve heating performance.
As furnaces age, parts like belts, bearings, motors, and heat exchangers begin to wear out. Cold weather puts even more strain on already aging components, making winter the most common time for breakdowns. If your furnace is more than 15 years old and experiencing frequent issues, it may be nearing the end of its lifespan. In many cases, upgrading to an energy-efficient model can save you money on heating repairs and utility bills. Get in touch with a nearby HVAC company when it’s time for furnace replacement.
Colder temperatures naturally force your furnace to work harder. If your system isn’t properly sized or hasn’t been maintained, this extra demand can lead to reduced performance. Homes with poor insulation or drafty windows may also cause the furnace to run constantly without ever reaching the desired temperature.
Is your furnace showing signs of struggling? Call the team at Service Hero for fast and reliable furnace repair. We’ve been a trusted HVAC company that has been around for over 40 years. Our decades of experience have taught us that when it comes to furnace issues, professional expertise, fast response, and attention to detail make all the difference. Our local HVAC experts in La Habra, CA are well-equipped to troubleshoot and fix all heating problems you may be dealing with. Contact us today to schedule an appointment.
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