Facebook

HVAC Blog

Home > HVAC Blog

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.

Read More »

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

Satisfied Clients

Our Number One Goal

Flurish


★ ★ ★ ★ ★

"Very courteous and professional. They always take great care of us."

Chip S.
(Google Review)

★ ★ ★ ★ ★

"Great Heating and Air Company to work with who are always professional, courteous, fairly priced and even help in a timely manner when things break at the most inconvenient time."

Melissa Philebaum
(Google Review)

★ ★ ★ ★ ★

"I had an excellent experience with Hartman Brothers from start to finish. After dealing with an incomplete and frustrating repair from Peterman Brothers, Hartman Brothers was a breath of fresh air. Their technician spent several hours thoroughly troubleshooting my tankless water heater, walking through the issues clearly and professionally. There was no upselling, no pressure, and no shortcuts—just honest, methodical work. Based on their findings, I chose to upgrade to a new tankless water heater, and the decision was entirely mine. At no point did they try to push a sale or steer me toward anything unnecessary. The installation was clean, the communication was excellent, and the entire process felt transparent and trustworthy. It’s clear why they have such a strong reputation in the Fort Wayne area. Their professionalism, responsiveness, and genuine customer‑first approach really stand out. I’m very happy with the new system and with the service I received. "

Cory T.
(Google Review)

★ ★ ★ ★ ★

"Great pleasant staff from the initial phone call to the service tech! Friendly, knowledgeable, and conscientious."

Kimberly B.
(Google Review)

★ ★ ★ ★ ★

"Came home from work to find that my furnace wasn't working. Since the temperatures were extremely mild for November, I just left a message for them to call me the next day. Received a call by 7:25 am and told that the repair man would be there in approximately a half hour. He was at my house by 8:30 and he had it back running within 45 minutes. He went the extra step and made sure that there was no other possible issues before he left. I'd recommend Hartman Brothers Heating to anyone, they are courteous, reliable, knowledgeable and won't gouge you like some companies."

Renee Collins
(Google Review)

★ ★ ★ ★ ★

"We could not be happier with our service, estimate for a new system and most of all offering to but coolant in the system to give us AC until new system is installed."

Lanna Benjamin
(Google Review)

★ ★ ★ ★ ★

"Arrived on time and work completed in a professional way. Would highly recommend Hartman’s."

Bob B.
(Google Review)

★ ★ ★ ★ ★

"Josh was very knowledgeable! He was able to find the problem with our furnace and fix it. He was not pushy and didn't try to sell us anything we didn't need! We will definitely do business with Hartman's again when needed!"

Brian Trumbower
(Google Review)

Contact Us

Call Today to Schedule with Us