Understanding Furnace Short Cycling The Truth Behind This Common Problem


Debunking a Common Heating System Misconception

One of the most persistent myths we encounter at Columbia Cooling & Refrigeration is that a furnace that frequently turns on and off – known as “short cycling” – is working harder to heat your home and therefore must be doing a better job. This couldn’t be further from the truth.

Why Short Cycling Is Actually Harmful

Short cycling is actually a sign that something isn’t working correctly in your heating system. When a furnace runs in short bursts, it:

• Uses more energy than necessary
• Creates unnecessary wear and tear on components
• Fails to distribute heat evenly throughout your home
• Reduces the overall lifespan of your system

Common Causes of Short Cycling

Several factors can lead to short cycling:

1. Oversized furnace for your space
2. Dirty air filters
3. Faulty thermostat
4. Blocked vents or returns
5. Malfunctioning flame sensor

The Real Truth

A properly functioning furnace should run for longer cycles, typically 10-15 minutes per cycle during normal operation. This allows for proper heat distribution and maximum efficiency, particularly in areas we serve like Wenatchee and East Wenatchee, where winter temperatures can be quite challenging.

The Solution

If your furnace is short cycling, it’s important to have it professionally inspected. Regular maintenance and proper sizing during installation are key to preventing this issue and ensuring optimal performance throughout the heating season.

Remember: An efficiently running furnace doesn’t need to constantly turn on and off to maintain your desired temperature. Instead, it should operate in steady, consistent cycles to provide reliable comfort for your home.

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