Since 1957, Harlen Johnson HVAC, Plumbing & Electrical has been the trusted name for home comfort and safety across Dallas and the surrounding communities. We understand that when your AC fails on a scorching Texas day, your furnace goes out in a winter chill, or a plumbing leak threatens your home, you need more than just a technician—you need a reliable partner you can trust.Our family-owned and operated business is built on a foundation of integrity, craftsmanship, and a genuine commitment to our neighbors. We don't just fix systems; we provide peace of mind. Every member of our team is highly trained, background-checked, and dedicated to treating your home with the same care they would t...
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Our Services
Air Conditioning Services
<p>When the Texas heat bears down, a reliable air conditioning system isn't a luxury—it's a necessity. At Harlen Johnson, we provide comprehensive AC solutions to keep your Dallas-area home or business cool and comfortable all year long. Our certified technicians are experts in all makes and models, from traditional central air systems to modern ductless mini-splits.</p><p>We specialize in prompt <strong>AC repair</strong> to diagnose and fix issues like r...
<p>When the Texas heat bears down, a reliable air conditioning system isn't a luxury—it's a necessity. At Harlen Johnson, we provide comprehensive AC solutions to keep your Dallas-area home or business cool and comfortable all year long. Our certified technicians are experts in all makes and models, from traditional central air systems to modern ductless mini-splits.</p><p>We specialize in prompt <strong>AC repair</strong> to diagnose and fix issues like refrigerant leaks, compressor failures, and faulty thermostats before they lead to a complete breakdown. For older or inefficient units, our <strong>AC replacement</strong> service ensures you get a new, energy-efficient system perfectly sized for your property, which can significantly lower your utility bills. Don't wait for a crisis; our <strong>AC maintenance</strong> plans are designed to extend the life of your unit, improve efficiency, and catch small problems early.</p><p>Why choose us? With decades of experience serving the unique climate of North Texas, we understand the strain placed on cooling systems here. We use advanced diagnostic tools and offer honest recommendations, whether a simple repair or a full <strong>AC installation in Dallas</strong> is the best path forward. We stand behind our work with strong warranties and a commitment to your complete satisfaction.</p>
Plumbing & Water Heater Services
<p>From a dripping faucet to a major slab leak, plumbing problems can cause significant damage and disruption to your Dallas home. Harlen Johnson's licensed plumbers are equipped to handle any plumbing issue with precision and care. We offer a full spectrum of services to protect your property and ensure your water systems run smoothly.</p><p>Our team excels in <strong>leak detection</strong> using non-invasive technology to find hidden leaks behind walls or un...
<p>From a dripping faucet to a major slab leak, plumbing problems can cause significant damage and disruption to your Dallas home. Harlen Johnson's licensed plumbers are equipped to handle any plumbing issue with precision and care. We offer a full spectrum of services to protect your property and ensure your water systems run smoothly.</p><p>Our team excels in <strong>leak detection</strong> using non-invasive technology to find hidden leaks behind walls or under foundations. We provide lasting solutions through <strong>pipe repair and re-piping</strong>, addressing corroded or damaged lines with durable materials. For your hot water needs, we install and repair both traditional tank and <strong>tankless water heaters in Frisco, McKinney, and beyond</strong>, offering energy-efficient models that provide endless hot water on demand.</p><p>We also tackle tough <strong>drain and sewer line</strong> issues, including <strong>clogged toilets</strong>, <strong>drain cleaning</strong>, and <strong>hydro jetting</strong> to clear deep blockages. For businesses, our <strong>commercial plumbing services</strong> ensure minimal downtime. You can trust our local plumbers because we arrive on time, explain the problem clearly, provide upfront pricing, and clean up thoroughly after the job is done, restoring order to your home.</p>
Electrical Services
<p>Your home's electrical system is the backbone of modern living, powering everything from lights to appliances to your security system. Ensuring it is safe, reliable, and up-to-code is paramount. Harlen Johnson's team of licensed electricians provides professional electrical services for homeowners throughout the Dallas-Fort Worth metroplex, giving you confidence in your home's safety.</p><p>We handle everything from routine updates to complex installations. Co...
<p>Your home's electrical system is the backbone of modern living, powering everything from lights to appliances to your security system. Ensuring it is safe, reliable, and up-to-code is paramount. Harlen Johnson's team of licensed electricians provides professional electrical services for homeowners throughout the Dallas-Fort Worth metroplex, giving you confidence in your home's safety.</p><p>We handle everything from routine updates to complex installations. Common services include <strong>electrical panel repair and replacement</strong> to meet increased power demands safely, <strong>lighting installation and repair</strong> for both indoor and outdoor spaces, and <strong>outlet and GFCI installation</strong> to protect against shocks in kitchens and bathrooms. We also install essential safety devices like <strong>smoke detectors and CO detectors</strong>, and modern conveniences like <strong>EV charging stations</strong> and <strong>home automation systems</strong>.</p><p>Flickering lights, frequently tripping breakers, or outdated wiring are more than inconveniences—they are potential fire hazards. Our <strong>electrical safety inspections</strong> provide peace of mind by identifying risks before they become emergencies. As your local <strong>emergency electrician in Dallas</strong>, we are available 24/7 to restore power and safety. We adhere to the strictest national and local codes, ensuring every job is performed to the highest standard of quality and safety.</p>
Heating & Heat Pump Services
<p>Winter in North Texas can bring unexpected cold snaps, making a dependable heating system essential for your family's comfort and safety. Harlen Johnson delivers expert heating solutions, from quick furnace repairs to complete system replacements. We service all types of heating systems, including gas furnaces, electric heat, and versatile heat pumps.</p><p>If your heater is blowing cold air, making strange noises, or failing to start, our <strong>heating repair&l...
<p>Winter in North Texas can bring unexpected cold snaps, making a dependable heating system essential for your family's comfort and safety. Harlen Johnson delivers expert heating solutions, from quick furnace repairs to complete system replacements. We service all types of heating systems, including gas furnaces, electric heat, and versatile heat pumps.</p><p>If your heater is blowing cold air, making strange noises, or failing to start, our <strong>heating repair</strong> technicians can quickly diagnose the issue. For older, inefficient units that are costly to run, our <strong>heating replacement</strong> service provides a new, high-efficiency model that heats your home more effectively and reduces energy consumption. We also offer <strong>heat pump services</strong>, which are an excellent year-round solution for our climate, providing both efficient heating and cooling from one system.</p><p>The key to avoiding a cold-weather emergency is proactive care. Our <strong>heating maintenance</strong> service includes a thorough inspection, cleaning, and tuning of your system to ensure it operates at peak performance when you need it most. Trust the local experts who have been serving Dallas homes since 1957. We provide honest assessments, quality <strong>heating installation in Plano, Richardson, and surrounding areas</strong>, and stand behind our work with reliable warranties and customer-focused service.</p>
“Harlan Johnson maintains & services our commercial HVAC units. Very impressed with how this company handled a recent service situation. When a …”
— Deborah McFarland
“This review is not really about NTX but about the person they sent out from a different company. His name was Miguel and he was excellent. Very knowledgeable, didn't rush thru his evaluation of our problems even though it was very late in …”
— Brenda Deneault
“Best service I’ve received for any type of home repair in years. Jennifer at dispatch was so caring and efficient. Our technician, Jesus, was top notch an went above and beyond to help. He was also patient with our toddler and dog. I highly recommend.”
— Melinda Balli
“The HJ tech Charles was on-time, friendly, and professional on the HVAC maintenance visit. He patiently answered my questions, and was efficient and clean in his work. I would definitely use him and HJ again in the future.”
— Eric Essig
“Jose rescued my house. I had 50 year old cast iron pipes that had to be replaced, plus other plumbing issues. Jose was so patient with me as I had lots of questions, and he explained things clearly. He was professional, yet always …”
— Lois Russell
“Really great service. Plumbing issues can be scary, but they did a great job of explaining everything and making recommendations about the issues to prioritize. Both Juan and Miguel have come out to help us and they were excellent. I appreciated their friendliness and willingness to explain things. Thanks guys!”
— Erin M
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Since 1957, Harlen Johnson HVAC, Plumbing & Electrical has been the trusted name for home comfort and safety across Dallas and the surrounding communities. We understand that when your AC fails on a scorching Texas day, your furnace goes out in a winter chill, or a plumbing leak threatens your home, you need more than just a technician—you need a reliable partner you can trust.Our family-owned and operated business is built on a foundation of integrity, craftsmanship, and a genuine commitment to our neighbors. We don't just fix systems; we provide peace of mind. Every member of our team is highly trained, background-checked, and dedicated to treating your home with the same care they would their own.We believe in getting the job done right the first time, with transparent pricing and clear communication every step of the way. Whether you're in a historic Dallas home or a new build in Frisco, our deep local knowledge ensures we recommend the perfect solution for your specific needs and budget. From emergency repairs to planned installations and comprehensive maintenance plans, your comfort and satisfaction are our top priorities.Choose Harlen Johnson for expertise that spans generations and a commitment to excellence that has stood the test of time.
Serving Preston Hollow, TX and nearby communities.
