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Winter brings teeth-chattering temperatures that drop into single digits. This is the time we rely on our furnaces to keep us warm and comfortable. In cold weather, furnaces become the hardest-working appliances, and they are often pushed to the limit. So, it’s common for these systems to malfunction during winter. A malfunctioning furnace when winter comes around can turn into a household emergency. It’s best to have a professional HVAC service provider on speed dial to be on the safe side.

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At Service Hero, we understand how essential a reliable furnace is during the colder months. In this post, we’ll talk about the common causes of furnace problems in the winter and when you need to call a nearby HVAC company. Understanding why furnaces stop working in cold weather can help you prevent major breakdowns.

Increased Demand and System Strain

During cold weather, your furnace runs almost constantly to keep your home warm. This increased demand puts extra strain on components such as the blower motor, heat exchanger, and ignition system. If any of these parts are already worn or nearing the end of their lifespan, the added workload can cause them to fail. Furnaces that haven’t been properly maintained are especially vulnerable when temperatures plunge. Be sure to seek help from furnace repair specialists when you notice signs of a faulty furnace.

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Dirty or Clogged Filters

When filters become clogged with dust and debris, airflow is restricted. This forces the furnace to work harder, leading to overheating. Many modern furnaces are designed to shut down automatically when they detect overheating as a safety measure. In extreme cold, restricted airflow can quickly push the system past its limits, resulting in a shutdown.

Frozen or Blocked Vent Pipes

High-efficiency furnaces vent exhaust gases through pipes that often run outside the home. In freezing temperatures, these vent pipes can become blocked by snow, ice, or frost. When exhaust gases cannot escape properly, safety sensors may shut the furnace down to prevent carbon monoxide buildup. Ice buildup can also occur from condensation freezing inside the vent, especially if the system isn’t properly installed or insulated. Luckily, furnace repair companies can help you resolve this issue and restore proper functioning.

Ignition and Pilot Light Problems

Cold weather can affect a furnace’s ignition system. Older furnaces rely on a pilot light, which can be blown out by drafts or fail due to a dirty thermocouple. Newer systems use electronic igniters that can crack or wear out over time. When temperatures drop, these components are used more frequently, increasing the likelihood of failure just when you need heat the most. Common fixes for these issues involve cleaning the pilot orifice, replacing the thermocouple, or resetting the furnace. Get in touch with a local HVAC company for help with fixing a faulty ignition system.

Thermostat Issues

Sometimes the problem isn’t the furnace at all. Cold weather can impact thermostat performance, especially if the thermostat is located in a drafty area or near a cold exterior wall. Batteries in programmable thermostats may also fail more quickly in winter. When the thermostat isn’t communicating correctly with the furnace, the system may not turn on or may cycle improperly.

Do You Need Heating Repair? Contact Service Hero Today

When your furnace is on the fritz, you can count on Service Hero to keep your home comfortable. For years, we’ve built our reputation on quality workmanship, durable products, and superior customer service. If your furnace is acting up or you want to schedule preventive maintenance, give us a call. Our skilled and experienced HVAC service technicians are here to help you stay warm and worry-free throughout the cold weather. Call Service Hero now to make sure your furnace is in perfect working order this winter.

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