Bad Thermostat? What Springdale Homeowners Need to Know
When your HVAC system stops doing its job, it’s easy to assume the worst: a broken air conditioner, a burned-out furnace, or expensive electrical issues. But sometimes the real culprit is something much smaller — and easier to fix. If your home’s temperature never feels quite right, a bad thermostat might be to blame.
At Stith Plumbing and HVAC, we’ve helped hundreds of Springdale families stay comfortable year-round. And we’ve found that thermostat issues are more common than many homeowners realize — especially in the middle of a hot Arkansas summer. Below, we’ll walk you through the warning signs, troubleshooting tips, and when to call for help.
Bad Thermostat Symptoms You Shouldn’t Ignore
A malfunctioning thermostat may seem minor, but it can cause major problems in your home comfort and energy bills. Here are some of the most common signs of a bad thermostat:
1. HVAC Won’t Turn On (or Won’t Turn Off)
Your thermostat acts as the command center for your heating and cooling system. If it can’t properly signal the A/C or furnace to start or stop, your equipment won’t work as it should. You may notice that your system stays off even though the house is sweltering, or runs continuously until you manually shut it off.
2. Inaccurate Temperature Readings
If your home feels 80 degrees but the thermostat says it’s a cool 72, there’s likely a sensor issue. Older thermostats can become less accurate over time, and even newer digital units can fail due to electrical issues or physical damage.
3. Uneven Heating or Cooling
Are some rooms in your house much hotter or colder than others? A bad thermostat may not be cycling the system correctly, leading to inconsistent comfort throughout your home.
4. Blank Display or Flickering Screen
If the screen is dead or difficult to read, check the batteries first. If fresh batteries don’t fix it, there may be a wiring problem or the unit itself may need replacement.
5. Delayed HVAC Response
A working thermostat should send immediate signals to your HVAC system when you adjust the temperature. If there’s a long delay or no response at all, something’s not right.
Bad Thermostat Troubleshooting Tips
Before you call for a repair or assume your HVAC system is failing, try these basic thermostat troubleshooting steps:
1. Check the Power Source
If your thermostat screen is blank or unresponsive:
Make sure the circuit breaker hasn’t tripped.
If it’s a battery-powered model, replace the batteries with fresh ones.
For hardwired units, check for a blown fuse or loose wiring behind the thermostat cover.
2. Make Sure It’s Set Correctly
It sounds obvious, but double-check that:
The thermostat is set to “Cool” in summer (or “Heat” in winter).
The desired temperature is lower (or higher) than the current room temp.
The fan setting is on “Auto” (not just “On”), which lets the HVAC system cycle properly.
3. Clean Around the Thermostat
Dust and debris can affect internal sensors. Gently remove the cover and use a soft brush or compressed air to clear out dirt. Don’t use liquid cleaners, which can damage electronics.
4. Test the Accuracy
Use a portable thermometer to compare the actual room temperature with what the thermostat reads. A difference of more than 2–3 degrees may indicate sensor issues.
5. Reset the Thermostat
Many models have a reset button or option in the settings menu. A factory reset can sometimes resolve software glitches. Be sure to note any custom settings before resetting.
6. Check for Loose or Corroded Wires
Important: Only do this if you’re comfortable and have turned off power to the thermostat at the breaker box.
Remove the cover and inspect the wiring connections. If wires are loose, corroded, or out of place, that may be the root cause of the issue.
7. Test the HVAC System Directly
If the thermostat seems fine but the system still won’t run, try turning on the system manually (if your model allows) or testing the unit from its control board (this may require professional help).
When to Repair vs. Replace Your Thermostat
Not every issue requires a full replacement. Sometimes a simple fix — like tightening wires, cleaning contacts, or replacing batteries — can restore your thermostat’s function.
But if your unit is older, unreliable, or lacks modern features, replacement may be the better choice. Today’s smart thermostats offer major energy savings and convenience, especially for busy families or anyone trying to reduce utility bills.
Stith Plumbing and HVAC offers professional thermostat replacement and installation services across Springdale and surrounding communities. We’ll help you choose the right model for your system and lifestyle — whether it’s a simple programmable unit or a fully integrated smart thermostat.
How a Bad Thermostat Affects Your HVAC System
A bad thermostat can do more than just make you uncomfortable. It can also:
- Shorten your HVAC system’s lifespan. Constant cycling or extended run times stress your A/C or furnace.
- Drive up your energy bills. A malfunctioning thermostat may overcool or overheat your home, wasting energy.
- Create safety issues. In extreme heat or cold, failure to regulate indoor temperature can be dangerous.
Don’t wait for your HVAC system to suffer long-term damage. If you suspect a problem, Stith can test and inspect your thermostat and provide quick, affordable solutions.
Stith Plumbing and HVAC Can Help
Based in Springdale, Stith Plumbing and HVAC has earned a reputation for dependable service and honest advice. Whether you need thermostat repairs, HVAC maintenance, or full system replacements, we’re here to keep your home comfortable all year long.
Related services you may be interested in:
Furnace Repair and Replacement
Learn More About Thermostat Issues
For more general guidance on thermostats, energy efficiency, and HVAC troubleshooting, here are a couple of reliable non-commercial sources worth visiting:
University of Florida – Thermostat Tips
Consumer Reports – Thermostat Buying Guide
Your HVAC system depends on a working thermostat to do its job properly. If you’ve noticed signs like uneven temperatures, strange behavior, or a dead screen, don’t ignore them. A bad thermostat can lead to unnecessary discomfort, wasted money, and even equipment damage.
The good news? Stith Plumbing and HVAC makes it easy to diagnose and fix thermostat issues. Our licensed technicians are here to help Springdale homeowners stay comfortable no matter what Arkansas weather throws your way.
Call us today at (479) 751-9691 or schedule an appointment online. We’ll get your home back to the perfect temperature in no time.