Krugerville Aubrey Pilot Point North DFW
Thermostats
The Right Control, Wired and Configured Correctly
Controls & Thermostats
A Thermostat Is Only As Good as Its Setup
A thermostat looks like the simplest part of a heating and cooling system, which is why it is the part most often installed wrong. A smart thermostat wired without a common wire, a two stage furnace running on a single stage control, or a heat pump set up without the right auxiliary heat configuration will all appear to work and quietly cost you money and comfort every day.
HMS Heating & Air Conditioning installs, replaces, and repairs thermostats across Denton County. We match the control to the equipment it is actually driving, wire it properly, and then configure it, which is the step that usually gets skipped. If your existing thermostat is fine and the problem is elsewhere in the system, we will tell you that rather than selling you a new one.
Choose HMS
Built on Honesty, Since 2015
HMS Heating & Air Conditioning was founded by Gary Hays, a North Texas native who served in the Marine Corps as an aviation electrician.
He earned his HVAC license in 2015 and built the company on a simple standard: explain the problem, lay out your options with prices, and only then pick up a tool. That's how we handle every thermostat install across Denton County, and it's why so many of our customers come from referrals and stay for good.
And if it turns out you don't need the expensive fix, we'll tell you that too. Honesty, integrity, and a reasonable price have been the standard here from day one.
We Service and Repair All Major HVAC Brands
Our Process
Thermostat Work Done Right
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Understand the Complaint
Not holding temperature, blank screen, or the system running when it should not. The symptom points at whether the thermostat is even the problem.
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Check the Wiring
We look at what is actually behind the plate. Missing common wires and reused old cable cause most smart thermostat failures.
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Verify the Equipment
A control has to match what it drives: single or two stage, heat pump or gas, with or without auxiliary heat. We confirm before recommending.
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Pick the Right Control
Simple and reliable, or smart and scheduled. We lay out the options with prices and no push toward the expensive one.
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Install and Configure
Mounted level, wired properly, and then set up for your actual equipment rather than left on the factory defaults.
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Test Every Mode
Heat, cool, fan, and each stage. We watch the equipment respond to the control before we call it finished.
Common Symptoms
Signs the Thermostat Needs Attention
The room never matches the setting. A thermostat reading three degrees off, or placed in a hot hallway or near a supply vent, will run the system to the wrong target all day.
Blank or unresponsive screen. Usually a power problem: a missing common wire, a tripped float switch on the drain pan, or a blown low voltage fuse at the board.
Short cycling. A system that starts and stops every few minutes may have a control problem, though it can also be airflow. Worth measuring before replacing anything.
Schedules that do not stick. Programs that reset, or a smart thermostat that keeps dropping offline, usually trace back to power or wiring rather than the device itself.
Stages that never engage. If you have two stage or variable equipment on a basic control, you paid for capability the system cannot use. That is a configuration fix, not a repair.
What to Expect
What Our Thermostat Work Covers
Your Home,
Protected
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Replacement and Upgrades
From a straightforward like-for-like swap to a smart control, chosen to fit the equipment rather than the marketing.
Schedule an Install -
Wiring and Power Faults
Missing common wires, blown low voltage fuses, and float switches that shut the system down without explanation.
Schedule a Repair -
Configuration and Staging
Two stage, variable speed, and heat pump settings configured so the equipment uses everything you paid for.
Schedule an Install -
Heat Pump Controls
Auxiliary heat and balance point settings, which are the most commonly misconfigured part of a heat pump install.
Explore Heat Pump Repair -
Placement Problems
A thermostat in the wrong spot reads the wrong temperature. Sometimes the fix is moving it, not replacing it.
Explore Airflow Diagnostics -
Honest Assessment
Plenty of thermostat complaints are really equipment or duct problems. We check before we sell you a control.
Explore Furnace Repair
Customer Reviews
Trusted by Homeowners Across Denton County
"HMS is literally the best heating and air company you're ever going to find. We've been using them for years now and they have never let us down!!!"
"We woke up to a freezing house today because our unit's fan wasn't turning on. We called HMS, and Michelle was so kind on the phone. She quickly dispatched a technician, who arrived within an hour. They identified the issue right away…"
"These guys were on time and made things happen during the ice storm. Stayed till the job was done and restored my heat. I highly recommend!"
"Andrew and Nate were very professional, honest, & thorough.. They took their time making sure they diagnosed the problem correctly, within a few hours our heating system was running.."
"I had been with a different HVAC company for several years and they were going to charge me thousands of dollars to repair my heating unit. I wanted a second opinion, so I contacted HMS. Gary Hays was incredibly polite and professional…"
"I had an urgent need for my system to be checked due to concerns of carbon monoxide. They were at my house within 30 minutes. I was so grateful they were there when I needed them!"
"Top notch service! Andrew took the service call dispute awful weather conditions. He diagnosed the problem and gave us the solution. 10/10 would recommend this company. I'll definitely call them next time I have an issue."
"HMS deserves every one of these 5 star reviews! Andrew and Nate were super friendly, quick and easy to work with. They found the issue didn't push any extra products but did present all my options. I'll be calling them from now…"
"Very prompt and reliable. I appreciate the communication from the first contact through completion of the job. Andrew was very respectful, honest, knowledgeable, and efficient. Highly recommend!"
"Service techs were on-site within three hours of my call for assistance. The repair price was in line with regional standards, and the technicians were very helpful and nice to deal with. Would recommend this HVAC company for systems and repair."
"They did an amazing job with answering my call right before closing, coming out within 2 hours, and fixing my AC all in one night! Super professional, kind, and honest about what work needs to be done! Highly recommend for anyone!"
"Great company. Highly recommend. Gary and Andrew have helped us out in a pinch several times. They are fairly priced, prompt, don't push extras, and have great communication."
Common Questions
Thermostat Questions, Answered
Can I just install a smart thermostat myself?
Often yes, and plenty of people do. The two things that catch people out are the common wire, which many older installations do not have, and the configuration for staged or heat pump equipment. If the screen is blank or the heat runs when it should not, those are usually the reason.
What is a C wire and do I need one?
The common wire provides continuous power to the thermostat. Smart thermostats need it. Older systems often were not wired with one, and the workarounds some devices use are unreliable. We run a proper wire where we can.
My thermostat says one temperature and the room feels different. Why?
Either the thermostat is in a bad location, reading heat from a nearby vent, lamp, or sunlit wall, or the room genuinely is not getting the air it needs. The second one is an airflow problem and no thermostat will fix it.
Will a smart thermostat actually save me money?
Modestly, and mostly through scheduling rather than the device itself. If nobody is home from eight to five, a schedule saves real money. If someone is always home, the savings are small and comfort is the better reason to upgrade.
Do I need a separate thermostat for each system?
Yes, if you have separate systems. Two system homes need two controls, and they should be set up independently. Zoned single system homes are different and use dampers driven from one board.
Can you repair a thermostat instead of replacing it?
Sometimes. If the fault is wiring, a fuse, or a tripped safety switch, that is a repair and the thermostat is fine. If the device itself has failed, replacing it is usually cheaper than chasing it.