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What to Know About C-Wire If you’re upgrading your HVAC thermostat, it’s a good thing to find out in advance if your existing system provides a c-wire. Today’s smart thermostats provide a great deal more options and convenience such as wifi connectivity and a bigger, brighter, multi-functional control screen. These improvements typically draw more electricity than the existing thermostat you’re replacing. The c-wire (“c” stands for “common”) is an important extra electrical wire that enables continuous 24-volt power to operate newer smart thermostats. If you don’t have one installed with your existing model, you’ll probably need to have it installed in order to adequately power the new unit.

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Smart Thermostats , c-wire , thermostat issues , thermostat problems

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"I had ample notice of arrival via text. Technician picture was provided for safety and I appreciated that. Kept a clean work area and wore shoe covers inside the house. I had questions about the maintenance plan I had purchased in advance. The technician reached out to the office and clarified for me—the office was prompt with answers and the technician was very friendly, helpful and professional. We will certainly continue to purchase the annual maintenance visits with Hartman Brothers!"

— Melanie K.
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"Jim was courteous and professional. He was focused on the job. We are glad he came to service our equipment."

— Paul S.
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"Caleb was very professional in how he handled the service. I like how messages were sent updating the arrival time."

— Lane
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"He was very professional and thorough And did a great job."

— Jenny P.
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"Ked was my "usual" service tech for many years. He was always friendly & kind...and didn't mind letting my big dog say hi. He was always professional and efficient. I liked having the piece of mind in knowing my HVAC needs are met & running well. I have used their maintenance plan for many years now, and haven't been disappointed. Well, Caleb didn't disappoint either. He loved my "big boy" and had a great sense of humor. He was very thorough in servicing my air conditioner. I feel I get my money's worth from my maintenance plan each year. I love when they say, "Everything looks good, no problems. See you in the Fall.""

— Donna D.
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"Hartman Bros provides professional service always, all weather. My family has used them for more than 16 years - installation, repair and maintenance of air conditioning and furnace. Today (and always) Josh was on time, knowledgeable, professional and kind. Thank you again!"

— S. Harper
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"Jim, Did a great job on are heating and cooling system.Checked all items washed down heat pump. I would like to request Jim to return to check our system on the next 6 month check up."

— David B.
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"Had to call to have our furnace checked out since it stopped working. Called Hartman Brothers at 8:00 a.m. on a Friday and they had someone come to the house that same day. The service Tech was outstanding and delivered great customer service. He explained what he did and had s fixed in less than an hour! Highly recommend Hartman Brothers!"

— Rhonda R.
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