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Why Is My Furnace Short Cycling?

By January 11, 2019 Uncategorized No Comments

My Furnace Keeps Short Cycling. What Is Going On?

A furnace that is short cycling can be a frustrating issue when you are trying to keep warm.

furnace filter image

A short cycling furnace can be a frustrating issue to have.

Unfortunately, after not being used all spring and summer, some furnaces have some issues when it comes to firing up for the first time in the fall.

Let’s take a look at some common issues that could be causing your furnace to short cycle.

Dirty Furnace Filters

Dirty filters are one of the top causes of furnace and air conditioner break downs.

If your filter hasn’t been changed in a while, go ahead and take a look at it.

If the filter is very dirty, not much air will be able to pass through it and it can cause your furnace to overheat, which could be causing it to short cycle.

This is a simple fix that could prevent a future furnace repair.

Furnace Is Oversized

This type of issue is unfortunately only fixed by having your current furnace removed and the correctly sized furnace installed.

If you have a furnace that is too big for your home, it will end up using much more energy than needed.

This ultimately means that the warmer air will not be properly distributed throughout your home.

Your home will heat for a very short period of time, and then the furnace will kick right back on again, continuing to short cycle.

This is not good for your furnace’s overall health.

Not only will it increase your monthly energy bills, but it will also cause unneeded wear and tear on your furnace’s expensive parts.

If you believe your furnace may be over sized, you will need to have a professional HVAC company out to take a look and verify.

Faulty Thermostat

Some thermostats can be finicky.

Your furnace only does what your thermostat tells it to do.

If your furnace is short cycling on a continual basis, the fix may be as simple as replacing your current thermostat with a new one.

You can either buy one yourself at the store, or have a professional install one for you.

Also be sure to check the location of your thermostat in your home. Is it in direct sunlight during the day?

If so, this can cause to think it’s warmer in the home than it actually is.

The ideal location for your thermostat should be on an interior wall in a highly occupied area.

It should not be located near any windows where sunlight or drafts can affect it’s temperature reading of the home.