5 Common Furnace Thermostat Problems & Solutions

If your furnace won’t turn on, doesn’t respond to setting changes, short cycles, or forgets programmed settings, the thermostat may be at fault. In fact, thermostat issues are a common cause of furnace malfunctions. At Indoor Air Quality, Inc., our team of professional HVAC/R technicians has over 60 years of combined industry experience and we are happy to share our knowledge with you.

Here are five common causes of thermostat failure and how to solve them.

1. Dead Batteries

Just like any other electrical device, your thermostat needs batteries to operate. When the batteries die, the thermostat can no longer effectively monitor or adjust your home’s temperature. If you notice a low power warning, replace the batteries with fresh ones – preferably AA batteries over alkaline, as they tend to last longer and offer more consistent performance.

2. Grime Buildup

Dirt and grime can accumulate inside your thermostat over time, preventing it from accurately gauging and regulating the temperature. If your thermostat is on the older side, try gently dusting inside its cover and clean the contacts with a soft brush. A better and safer alternative is to have professional HVAC technicians inspect and maintain your thermostat to ensure its cleanliness and functionality.

3. Outdated Thermostat

With time, like any technology, thermostats can become outdated. The wear and tear can lead to more frequent malfunctions or inefficiencies in regulating your home’s temperature. If you’re dealing with an aged thermostat, it might be time for an upgrade. Modern programmable thermostats offer better performance and can help maintain optimal heating system efficiency.

4. Loose Wiring

Loose wiring is often a symptom of improper thermostat installation. This can lead to weak performance or even severe electrical hazards. It is crucial to avoid attempting DIY fixes on thermostat wiring, as it could exacerbate the problem. Instead, professional technicians should address any wiring issues for a safe and proper fix.

5. Improper Placement

The position of your thermostat can significantly affect its performance. To function correctly, it should not be in direct sunlight or near heat sources and ideally should be about 5 feet away from doors to prevent false readings. Improper placement can lead to incorrect temperature readings, causing your heating system to behave unpredictably.

While some thermostat issues are easily addressed, others require the expertise of professional technicians. Keeping your thermostat in good working order is not just a matter of comfort but also one of safety and efficiency, ensuring you get the most out of your heating system throughout those cold months.

Since 2001, Indoor Air Quality, Inc. has served Highlands Ranch and the Denver Metro Area. Check out our customer testimonials, contact us, or use our online contact form for more information and a free quote.