Common Thermostat Problems that Affect Your Furnace

While the thermostat may seem like a minor component in your home’s heating system, it actually plays a key role in regulating temperature and ensuring that your furnace operates efficiently. When in good working order, your furnace should maintain a comfortable indoor temperature and help optimize energy use. However, when thermostat problems arise, they can lead to unit malfunctions, discomfort, and even increased energy bills.

Since 1923, Standard Plumbing, Heating, and Air Conditioning has been serving the Manhattan, KS area with a focus on customer satisfaction. If you’re experiencing thermostat problems that are affecting your furnace, our team of dedicated HVAC professionals can help diagnose and resolve your heating system problem quickly and affordably.

Let’s look at some of the most common thermostat problems that can affect your furnace and what to do if you encounter these issues.

Thermostat-Related Furnace Problems

A properly functioning thermostat is essential to keep your home warm, comfortable, and efficient. When thermostat-related problems occur that disrupt this balance, homeowners may encounter uneven heating, increased energy costs, and other issues that impact their comfort and overall well-being. Some of the most common thermostat-related furnace problems include:

1. Incorrect Temperature Readings

One of the most common thermostat-related problems that homeowners run into involves incorrect temperature readings. A thermostat that displays incorrect temperature readings can cause significant heating issues.

There are several potential causes of an incorrect temperature reading, starting with improper placement. Thermostats installed in direct sunlight, near a heat source, or in an area with poor airflow, such as near a vent or exterior door, may read the temperature inaccurately.

Another reason your thermostat may be giving an incorrect temperature reading is because of dirt and dust buildup. Over time, dirt, dust, and debris can accumulate inside the thermostat, affecting its internal sensors and leading to false temperature readings. In some cases, a sensor may just be old or faulty, leading to heating inconsistencies.

Incorrect temperature readings can have multiple effects on furnace operation, such as the following:

• The furnace may run longer than necessary, increasing energy costs.
• The thermostat may prevent the furnace from turning on when needed, leading to discomfort.
• Uneven heating due to thermostat-related problems can make some rooms too warm while others remain cold.

Keeping your heating system running smoothly requires routine maintenance. That is why we offer our Standard’s VIP Program, a maintenance agreement for plumbing, heating, and air conditioning. Members can enjoy a wide range of perks when they sign up for VIP preventative service, such as priority response, no overtime charges, 10% discounts, free filters twice a year, free gas leak checks, and much more.

2. Thermostat Not Communicating with Furnace

You may suspect that your thermostat is not properly communicating with the furnace, leading to an array of heating problems. This lack of communication can have several causes.

First, the problem may be related to wiring issues. A thermostat relies on proper wiring to communicate with the furnace. Wiring problems can be caused by loose or disconnected wires, which is especially common in older heating systems where the wires become loose, disconnected, or corroded over time, leading to signal interruptions. Faulty installation of the thermostat can also prevent signals from effectively reaching the furnace. In some instances, damage can occur from rodents.

Power supply issues are another common reason why a thermostat may stop communicating with a furnace. When power supply problems occur, the first thing you want to check is the batteries. Many thermostats rely on batteries to function. If the batteries die, the thermostat may fail to communicate with the heating system.

Another potential reason why a thermostat may stop communicating with a furnace is due to a tripped circuit breaker. A tripped breaker can cut power to the thermostat or furnace, preventing communication. Some systems may experience a blown fuse, which can also disrupt thermostat functionality.

3. Furnace Not Turning On

It can be concerning to find that your furnace is not turning on at all. While this problem may seem unrelated to your thermostat, it’s important not to rule it out.

Thermostat settings can affect the unit’s ability to run properly. Start by checking the Mode Settings and ensure that the thermostat is set to “Heat”. Next, check that the temperature is not set too low. Finally, consider if the thermostat is on a programmed schedule which could delay heating.

Sensor malfunctions can also stop a furnace from turning on automatically. A thermostat sensor works by detecting the room temperature and signaling the furnace accordingly. If the sensor malfunctions, the thermostat can fail to trigger the furnace to turn on, cause the furnace to operate inefficiently, or require the calibration or replacement of the sensor to restore proper function.

With Standard Plumbing, Heating, and Air Conditioning, we make it easy to get the furnace repair services you need. We offer 0% interest financing and several discount offers, including $100 off water heaters, senior citizen discounts, and veterans and active military discounts. We also only provide high-quality products, including Amana.

4. The Heating System is Short Cycling

Short cycling occurs when the furnace turns on and off frequently. This common problem can occur for several reasons, some easily fixable and others that require immediate HVAC repair.

Poor thermostat placement can cause short cycling to occur. This includes thermostats placed too close to a heat source, such as a vent, appliance, or fireplace. Placing the thermostat in a drafty location, such as near a window, door, or vent, can also cause fluctuating temperatures, which can lead to unnecessary cycling.

Other causes for short cycling include faulty sensors and calibration issues. A miscalibrated thermostat may incorrectly sense that the home has reached the desired temperature, causing the furnace to shut off too soon. A faulty sensor or calibration issue can reduce energy efficiency, create inconsistent heating, and lead to excess wear and tear on furnace components, reducing their lifespan.

5. Unresponsive or Dead Thermostat

If you’re experiencing thermostat issues, you may find that it is unresponsive or may even appear dead. When this happens, there are several steps you should take before calling in an expert for HVAC repair.

Begin by replacing the batteries in the thermostat. Many thermostats require periodic battery replacements. If the screen is blank, the batteries may need to be replaced. For thermostats connected directly to the home’s electrical system, a wiring issue or power failure may be the cause.

Loose or damaged wiring can also cause a thermostat to appear unresponsive. Connections inside the thermostat can loosen over time, disrupting the communication with the furnace. Damaged wires, including those that are broken or corroded, can also prevent the thermostat from functioning properly.

Finally, age-related failures can occur as thermostats wear out over time. Older models may become unreliable and fail to regulate temperatures effectively. Upgrading to a modern, programmable, or smart thermostat can often improve efficiency and boost overall convenience.

Schedule Furnace Repair Service with Standard

Addressing thermostat-related furnace issues is crucial for maintaining home comfort and efficiency. Problems such as incorrect temperature readings, poor communication with the furnace, short cycling, and unresponsive thermostats can all contribute to heating inefficiencies and higher energy costs.

Regular maintenance, proper placement, and timely repairs or replacements can help ensure a reliable and efficient heating system. At Standard Plumbing, Heating, and Air Conditioning, we provide reliable HVAC services to get your home warm, comfortable, and efficient quickly and with the utmost care. Contact us today at (785) 776-5012 to schedule service or request an estimate.