Common Thermostat Issues to Look Out for in Your HVAC Unit

March 1, 2022

If you are used to a comfortable indoor stay, any change in your AC performance can be worrisome. When this happens, most homeowners are quick to check the HVAC unit for potential problems. The air conditioning might have some minor issues that need to be resolved, but at times, a faulty thermostat may be to blame. Below, we have highlighted the common thermostat issues that could be hurting the performance of your HVAC system.

1. Poor Positioning of the Thermostat

If the thermostat is installed near the doorway where there's direct sunlight, there’s a good chance your air conditioning will be running even when it shouldn't. The thermostat is the sensor that checks the room temperature and controls the running of the HVAC unit. When the temperatures are high, the AC gives out a cool breeze to keep the room temperature within range. During winter, when the temperatures are low, the thermostat will signal the HVAC to heat your home.

To ensure accurate functioning of the thermostat, you should install it away from direct sunlight and preferably five feet from the door or windows. Besides ensuring a comfortable indoor stay, proper thermostat positioning also improves your HVAC's efficiency since the unit will only be running when it's supposed to.

2. Installation Issues or Program Defects

Improper installation of the thermostat is another common problem that can cause your HVAC unit to fail or suffer frequent short cycling. Some of the signs of improper installation are wires hanging loosely from the thermostat or poor leveling, causing the thermometer in them to change position. The latter is also common with older thermostats installed in buildings that may have begun to shift or lose form.

With the newer thermostats, programming errors may cause the unit to misbehave. This problem isn't common, especially if you buy your thermostat or HVAC unit from a reputed manufacturer.

If your HVAC unit isn't working properly and you’re not sure whether the problem lies with the installation or the program, you should seek professional help from a reputable HVAC company such as 888 Heating. You also want to ensure that the technician handling the troubleshooting/repairs is licensed and fully insured.

3. Poor Maintenance of the Thermostat and HVAC Unit

A dirty thermostat may have a hard time accurately reading your home's temperatures. This results in poor temperature control, and the HVAC may not heat your home as required. Such problems are common with older thermostats that are not regularly maintained. You should also check for low power warnings from the thermostat and replace the batteries where necessary.

To avoid other performance issues with your thermostat, you should schedule regular HVAC maintenance services. These services should cover all the smart controls paired with your air conditioning unit. The right HVAC contractor will troubleshoot any problems with the thermostat and fix them to avoid unexpected breakdowns and efficiency issues. You'll also benefit from consistent cooling and heating levels, clean and fresher air, and enhanced durability for your HVAC unit.


As a homeowner or business owner, your HVAC is a critical investment that requires regular maintenance to ensure optimal performance. Most of the thermostat issues, such as poor positioning, dirt build-up, and poor leveling, can be fixed by a competent HVAC technician. When choosing a technician, look at the company's reputation, industry experience, and customer experience. If the thermostat needs replacement, always go for a quality product that's durable and compatible with your system.

Carlos Diaz
I believe in making the impossible possible because there’s no fun in giving up. Travel, design, fashion and current trends in the field of industrial construction are topics that I enjoy writing about.

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