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Why Does My Gas Furnace Stop Working at Night?

Written by Kendall Richards | September 25, 2019

Cold home with an angry couple warmly clothed hugging sitting on a sofa in the living room

When you settle in for a good night’s sleep only to find that your furnace is no longer keeping your home warm, you find yourself wondering what the problem could be. What would cause your furnace to work seemingly normally during the day, then shut down at night?

If you’re experiencing this frustrating problem, it may not be a total shutdown of the system, but there is a problem here that needs to be addressed. Here’s a look at why your furnace may be giving you more trouble at night.

Common Causes of Nighttime Gas Furnace Problems

During the day, the heat energy from the sun heats your home as it flows through the windows. This may mean you don’t notice furnace problems quite as much as you do when the sun goes down. In fact, it may mean that the problem exists all day long but is more noticeable after dark. It also means that your furnace has to work harder after the sun goes down and the temperatures drop at night, which means problems may be more noticeable. So, what could be the problem?

  • Short-cycling: If you’re noticing that the furnace shuts off regularly at night, it may be short-cycling. This happens when the furnace is too large for your home. If your furnace is short-cycling, it will turn on for a short period of time, then turn right off. This prevents it from heating your home properly.
  • Clogged air filter: Another potential problem is a clogged air filter. If the system does not have proper airflow due to a clogged or dirty air filter, the heat exchange may overheat, which would cause the furnace to shut down. If you’re experiencing problems, always check the filter first.
  • Dirty flame sensor: Finally, your furnace may have a dirty flame sensor. This can prevent the furnace from igniting, causing you to feel that it’s broken. This, again, is not a nighttime-specific problem, but you may notice it more often at night.

When To Get Help for Your Madison Furnace

If your furnace is consistently shutting off at night leaving your family in the cold, and it’s not due to a clogged air filter, then it’s time to get a professional’s opinion. With over 45 years of experience, All Comfort Services is ready to help. We can take a look at your furnace and determine what the problem might be, then help you address it in the most effective manner. We understand that heating problems in the Madison area are a serious issue, so we’re here for you 24/7.

Call All Comfort Services at (608) 838-7300 or contact our team online for furnace help today. We proudly serve homes in the Greater Madison area, and we can help you with your furnace problems.

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