Why does my furnace turn on and off repeatedly

Why Does My Furnace Keep Turning Off And On?

why does my furnace turn on and off repeatedly

Furnace Starts Then Stops — Furnace Troubleshooting

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Those of you who have read our articles, know that we are a small, U. Veteran-Owned heating and air conditioning company in California, and pride ourselves on giving straight, honest answers; we are straight-shooters, and this will be no different. After a few seconds or minutes, the furnace then clicks on again, and the cycle repeats itself. Now, you have to realize that a furnace turning on and off frequently, in itself, is a subjective matter. Contrary to what you might think, however, the frequency with which your furnace turns on and off is not so much what we are concerned with. We are more concerned with what is causing it to turn on and off so frequently.

Furnace problems are quite common in cold winters. There are many common issues that arise from furnaces and a furnace cycling off and on is one of them. Short cycling can be confused by many to the average function of a furnace. A furnace is meant to turn off and on repeatedly, but depending on your furnace, home situation, weather etc, determines how many times and for how long this is supposed to happen. A short cycling furnace will turn off and on repeatedly in a very short period of time.

Have you ever thought "Why does my furnace keep shutting off?
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Have you noticed that your furnace keeps shutting off almost as soon as it turns on, leaving you in the cold? Short-cycling — or having a furnace turn off and on quickly and more often than you have programmed — is a big problem for homeowners. So what causes a furnace to keep shutting off? And how do you fix it? Here a few potential issues your furnace could be facing.

The Top 3 Reasons Why Your Furnace Is Turning On & Off Frequently

Got a fickle furnace that frequently turns on and off? This is most common cause of short cycling.

Why Does My Furnace Blower Turn On and Off Constantly?

Short Cycling… Have you heard this term before? Your system could be short cycling. When a system short cycles, it can kick on and off repeatedly, sometimes multiple times per hour or in extreme circumstances, multiple times per minute. Your thermostat will tell your furnace to turn on and produce heat until it gets to the threshold of 70 or above. An exact determination of what is causing short cycling in your system can be difficult for the typical DIY user.

If your furnace turns on and off repeatedly for a minute at a time, not allowing the house to reach its proper temperature, it is short-cycling. In other words, the heating cycle and the resting cycle are each too short to accomplish anything. A standard home furnace generally turns on and off between three to eight times per hour, so its usual heating cycles last from seven to 20 minutes. When it happens every minute or two, your furnace is likely out of whack. Short-cycling can actually be a blessing in disguise.

Des Moines is known for its cold, harsh winters, which is why it is so important for your furnace to function properly. If your furnace is turning on and off frequently, it could damage the unit and cause you to pay higher energy bills. The frequency of the heater running may not necessarily be due to short cycling, which will be discussed later. Keep in mind that the average furnace turns on and off 3 to 8 times an hour, so be sure to count the number of cycles and how long each cycle lasts before getting concerned that your furnace is turning on and off too frequently. You can find the most common reasons why your furnace is turning on and off below. This may be a recurring theme in our blog articles, but a clogged air filter is the number-one reason why your furnace may be turning on and off repeatedly.


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