{"id":482,"date":"2024-02-26T11:00:00","date_gmt":"2024-02-26T19:00:00","guid":{"rendered":"https:\/\/www.cozyheatinginc.com\/blog\/?p=482"},"modified":"2026-06-09T05:09:37","modified_gmt":"2026-06-09T12:09:37","slug":"3-common-furnace-problems","status":"publish","type":"post","link":"https:\/\/www.cozyheatinginc.com\/blog\/heating-service\/3-common-furnace-problems\/","title":{"rendered":"3 Common Furnace Problems"},"content":{"rendered":"
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You\u2019ve been relying on your heating<\/a> system for quite a while now. And unfortunately, you\u2019ll likely need to keep relying on it for a few more months. It\u2019s at this point in the heating season that you\u2019ll start noticing that your furnace\u2019s performance may be suffering. Perhaps you\u2019ve ignored a heating bill that\u2019s higher than normal or your furnace seems to be taking forever to heat your home. <\/p>\n\n\n\n

But if you want your furnace to make it through the heating season, these signs that it needs professional attention from our team shouldn\u2019t be ignored. Doing so means running the risk of your furnace breaking down completely on the next snow day, or facing a costly repair that could\u2019ve been a minor fix. Let\u2019s go over 3 common furnace problems that usually occur later in the heating season.<\/p>\n\n\n\n

What are the most common furnace problems that require heating repair?<\/h2>\n\n\n\n

Common furnace problems include a dirty or clogged filter restricting airflow, thermostat malfunctions causing uneven heating, and ignition or pilot control issues preventing the system from turning on. Addressing these early helps avoid costly heating and air repair and keeps your home consistently warm.<\/p>\n\n\n\n\n\n\n\n

1. Furnace Short Cycling: Causes and Fixes<\/h2>\n\n\n\n

Short cycling becomes apparent when you notice that your furnace seems to be running all the time, but your home is taking forever to heat up. That\u2019s because your furnace is unable to complete a heating cycle. Something is interfering with its ability to heat your home, and what you\u2019re hearing is it turning on and off again as it tries to reach the temperature on the thermostat. <\/p>\n\n\n\n

There are many different issues that can cause short cycling such as a blocked exhaust vent, a clogged air filter, an ignition problem, or a clogged flue. Short cycling is something that one of our technicians will need to fix promptly. Letting it continue will result in high utility bills, decreased home comfort, and eventually, a full system breakdown. It\u2019s also incredibly hard on your furnace due to the constant wear and tear.\u00a0<\/p>\n\n\n\n

Likewise, if your air conditioner or ac unit is 10-15 years old, struggles with cooling, or needs frequent repairs, replacement may be the more cost effective choice than continuing repair.<\/p>\n\n\n\n

An inefficient air conditioner can drive up energy bills, and replacing it with a new air conditioner or new unit with a higher seer rating can be a more energy efficient way to lower energy costs in the long run, since SEER measures AC efficiency and higher ratings generally mean lower bills. New central air conditioning units must meet at least 14.3 SEER2, while air-source heat pumps must meet at least 8.8 HSPF2 and 15.2 SEER2. An energy-efficient replacement helps reduce energy consumption by minimizing waste and lowering monthly utility bills.<\/p>\n\n\n\n

2. Unusual Furnace Noises and What They Mean<\/h2>\n\n\n\n

Strange and sudden furnace noises are definitely a cause for concern. If your once-quiet furnace is making a ruckus, it\u2019s a surefire sign that something is amiss. Certain noises usually mean specific problems.<\/p>\n\n\n\n

  • Grinding or metal-on-metal noises can mean there\u2019s a part that has come loose or that the lubrication between moving parts has worn down. <\/li>
  • A continuous clicking noise can mean that there\u2019s an ignition problem.<\/li>
  • A booming or banging noise can also indicate a problem with the ignition system in a gas furnace. <\/li>
  • Shrieking or screeching noises could be caused by a loose fan belt. <\/li><\/ul>\n\n\n\n

    Not only are loud noises alarming, they\u2019re also caused by issues that should be fixed promptly to avoid an even costlier repair and to protect the rest of the HVAC system. The furnace and air conditioner work together as part of one system. In most homes, the furnace and air share the same blower to move air through the house. That\u2019s why problems in one part of the system can affect AC performance too.<\/p>\n\n\n\n

    When you install a new furnace and air conditioner together, the matched ac systems and other equipment in a new system are more likely to deliver better energy efficiency, overall efficiency, and smoother, quieter performance with variable speed features, while mismatched HVAC units can increase wear and even create warranty issues. Variable-speed equipment can also improve humidity control and air filtration compared with single-stage equipment. Replacing both at the same time can save money on installation, help you avoid future costly repairs, and still remains a significant investment, so professional installation and excellent service matter for long-term performance.<\/p>\n\n\n\n

    3. Weak or Lukewarm Airflow From Your Furnace Explained<\/h2>\n\n\n\n

    Does it seem like your home is taking longer than usual to achieve the set temperature on the thermostat? Try holding your hand up to one of the vents when the furnace is running. Is the flow of air strong and decidedly hot? If it\u2019s weak and\/or lukewarm, then your furnace is struggling to generate enough warmth. Try changing the air filter to see if that improves both the airflow and the temperature. If not, it\u2019ll require attention from our team.\u00a0<\/p>\n\n\n\n

    Furnace Replacement Considerations and Costs<\/strong><\/h2>\n\n\n\n

    When weak airflow continues, maintenance and regular maintenance can help, but a licensed company should determine whether repair or furnace replacement is the better option for the home. Proper furnace sizing depends on home size and square footage, but replacing a furnace should also prioritize system type, efficiency ratings, and proper sizing for the Pacific Northwest climate. A Manual J load calculation helps determine the right unit for Everett, Washington, where heating needs are shaped by IECC Climate Zone 4C. The total cost of furnace replacement can vary widely, from a few thousand dollars to tens of thousands, based on factors such as system type, efficiency, features, labor, access, ductwork, cooling units, cooling systems, and whether the replacement is part of a full HVAC replacement or ac replacement.<\/p>\n\n\n\n

    Larger equipment and more complex labor generally raise the price. The cheapest option is not always the best long-term value. A high efficiency or energy-efficient furnace or new HVAC system may have a higher price upfront, but Washington efficiency metrics like AFUE for heating and SEER2 for cooling affect monthly bills, and state policy strongly favors electric heat pumps over standalone gas furnaces for primary heating. Permits are required for new AC and furnace installation in Everett, and the quality of the physical installation has a direct effect on furnace lifespan, performance, and overall cost. If ductwork is altered, local codes may require a duct-leakage test. In a split system, the indoor unit moves conditioned air through the home while the outdoor compressor manages refrigerant. An ac combo installation can be a practical choice when replacing both systems together, and equipment selection and job complexity affect installation speed.<\/p>\n\n\n\n

    Choosing the right system and professional HVAC people for installation ensures optimal comfort, meets specific needs, and helps achieve lower energy bills and lower utility bills for homeowners in the Pacific Northwest and beyond.<\/p>\n\n\n\n

    Frequently Asked Questions<\/h2>\n\n\n\n