Your thermostat controls your HVAC system to keep your home comfortable. When it malfunctions, it can cause your HVAC system to run inefficiently or not at all, leading to discomfort, higher energy bills, and potential system damage.

A properly working thermostat is key to maintaining both comfort and energy efficiency.

In this guide, we’ll discuss key signs of a faulty thermostat so you know when to schedule a thermostat repair and can take back control before the problem gets worse.

1. Inconsistent Room Temperatures

If some rooms are hot and others cold, your thermostat could have a sensor or calibration problems causing inaccurate readings. Thermostats are typically at a central point in the home. The further away a room is from the thermostat, the more likely it is to have a different temperature.

It could be fixed with a simple recalibration, or you could consider HVAC zoning with multiple thermostats for more accurate temperatures and consistent comfort.

2. HVAC System Won’t Turn On or Off

When your HVAC won’t start or stop running, the thermostat may not be communicating correctly. A faulty thermostat might improperly send signals to your heating and cooling units, either keeping them off when they should be on or continuing to run them unnecessarily.

This could be due to dead batteries or loose wiring, so start by checking the batteries and inspecting the wiring connections to see if the thermostat is at fault.

3. Unresponsive Thermostat Controls

If your thermostat doesn’t react to pressing buttons or adjusting settings and has a delayed response or blank screen, these are obvious signs of issues with unresponsiveness.

It may be caused by dead batteries or more serious problems like internal damage or software glitches in smart thermostats.

4. Short-Cycling or Constant Running

Short-cycling occurs when your HVAC system turns on and off frequently, straining it and often causing energy bill spikes. The thermostat might also fail to signal the system to shut off, causing it to run nonstop.

This can happen due to thermostat issues like faulty sensors or poor placement. It could also be caused by an undersized HVAC system.

5. Incorrect Temperature Readings

A malfunctioning thermostat can produce incorrect readings, leading to discomfort and HVAC inefficiency. This can happen if your thermostat is placed near heat sources or windows. Internal sensors must work well for efficient heating and cooling.

6. Thermostat Settings Keep Resetting

If your thermostat keeps resetting, it can signal electrical problems or internal malfunctions. This can happen with outdated units, or it could be a compatibility issue with your HVAC system. The problem is especially common with older digital thermostats.

7. Rising Energy Bills Without Explanation

Unexplained increases in energy bills are often linked to malfunctioning thermostats. A miscalibrated thermostat can cause your HVAC system to overwork. Turning your HVAC system off and on more often uses more energy.

Compare your energy usage to the same time last year and schedule HVAC maintenance if you haven’t had it in a year.

8. Thermostat Is Old or Outdated

If your thermostat has surpassed its typical 10-year lifespan, it’s time for an upgrade. A faded display, sticky buttons, or frequent malfunctions indicate old age. Upgrading to a smart thermostat can improve efficiency, offer remote control, and help lower energy bills over time.

9. Manual Adjustments Needed Frequently

If you constantly adjust your thermostat’s settings, it may signal a failure in automatic scheduling or programming features.

A well-functioning, modern thermostat should maintain consistent comfort without constant tweaking. Constant tweaking can also indicate poor installation or incorrect settings.

When To Repair vs. Replace a Thermostat

If your thermostat is relatively new and the issue is minor, repair is usually a quick and cost-effective solution. However, for older models, thermostat replacement is often best. Upgrading to a smart thermostat improves energy efficiency and adds convenience to your daily routine.

Consider United Air Temp for Expert Thermostat Services

United Air Temp is here for your thermostat needs. With over 90 years in business and ongoing training for our technicians, we have the experience to deliver the solutions you need.

Schedule a thermostat repair or replacement in Baltimore, MD, today.