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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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"Hartman Bros representatives are wonderful! Caleb is super great at answering all my questions and explaining everything so I feel very much at ease. I definitely recommend Hartman Bros for heating and AC installation and servicing. Their employees are super polite and very helpful and pleasant! Great job as always!"

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"Ked was excellent, friendly from the start and extremely helpful. Because of how thorough he was, he fixed the problem but also discovered another potential problem and promptly fixed it as well."

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"Our Sunday started with the air-conditioner not cooling our home. Monday same thing but not sure if it just couldnt keep up with the high temps. Tuesday decided to call Hartmans heating & Air Conditioning Very. Busy but said they would send a tec out on Thursday. Tec came we talked and he went to work to find the problem, We need a new start up switch , it was installed and after all his checking he gave us a smile and said we are back with the air conditioning working,, We have been with Hartmans for many years and are always so grateful, thankful for their help. Give them a calll."

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"Our technician arrived as scheduled, was courteous at the door and asked if it was OK to come into the house, after which he put his booties over his work shoes. He (I wish I knew his name) seemed to complete his tasks efficiently, cleaned up his workspace and gave a thorough rendition of the condition of our AC unit. I appreciated his work and glad that we had the service contract. Great Job!"

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