YouTube is the field-service technician's free continuing-education library. Whether you are a brand-new tech trying to understand superheat and subcool, a homeowner staring at a frozen evaporator coil, or a contractor trying to grow a one-truck operation into a five-truck operation, somebody on YouTube has already made the video. The hard part is filtering signal from noise. The list below is ten of the strongest HVAC channels operating right now, organized loosely from foundational training to real-world field content to business and operations.
Every channel here is currently active and worth a subscription. Subscriber counts are approximate. If you only have time for three, start with HVAC School, AC Service Tech LLC, and HVACR Videos. Those three between them cover almost every fundamental skill, troubleshooting workflow, and field scenario a tech will run into.
How to Use This List
Treat the categories as suggestions rather than rules. Most full-time techs end up subscribing to a mix of training channels for fundamentals, field-content channels for troubleshooting muscle memory, and one or two business channels once they start thinking about running the truck instead of just driving it. A reasonable starter playlist for a new tech is five training videos a week plus two field-troubleshooting videos. Stretch that across a slow winter or summer shoulder season and you cover more ground than most apprenticeship programs.
1. HVAC School
Hosted by Bryan Orr. Around 450K subscribers. Technical training and fundamentals.
HVAC School is probably the single most influential training channel in the industry. Bryan Orr runs Kalos Services in Florida and built HVAC School as the educational arm to support his own techs. The library covers everything from psychrometrics and refrigerant theory to electrical troubleshooting and customer communication, all delivered in a quiet, methodical, no-yelling-into-the-camera style. The companion podcast and free study materials at hvacrschool.com fill in everything the YouTube videos do not. This is the channel to send a new apprentice to on day one.
2. AC Service Tech LLC
Hosted by Craig Migliaccio. Around 500K subscribers. Step-by-step technical instruction.
AC Service Tech LLC is the channel you want when you need a procedure walked through end-to-end. Craig Migliaccio is a vocational HVAC instructor and his videos are organized like classroom modules: clear titles, clear measurements, clear cause-and-effect. Refrigerant charging, capacitor testing, contactor swaps, heat-pump reversing-valve diagnostics. Pick a fundamental skill and there is almost certainly a tight ten-minute video that nails it. Pairs perfectly with HVAC School.
3. HVACR Videos
Hosted by Chris Stephens. A large, growing channel covering real-world commercial refrigeration and HVAC.
HVACR Videos is the field counterpart to the classroom channels. Chris Stephens runs an HVACR business in southern California and films his actual service calls, walking through the diagnostic decisions in real time. Commercial refrigeration is the dominant flavor, but residential and light commercial show up regularly. If you want to see how a senior tech thinks his way through a weird symptom on a real piece of equipment with a real customer waiting, this is the channel.
4. Word of Advice TV
Around 600K subscribers. HVAC and plumbing repair walkthroughs.
Word of Advice TV has grown into one of the largest channels in the trade. The content leans toward repair walkthroughs accessible to both techs and informed homeowners: replacing a blower motor, diagnosing a furnace lockout, swapping a thermostat, finding a refrigerant leak. The pace is faster than the training channels and the camera work is genuinely good, which makes it the channel to send a customer who wants to understand what you just did at their house.
5. grayfurnaceman
Retired HVAC tech and instructor with more than 35 years in the field.
grayfurnaceman is the patient grandfather of HVAC YouTube. The host is a retired service tech who has been uploading clear, slow, deliberate instructional videos for more than a decade. The production is unfussy. The content is gold. If you want to understand why a gas valve does what it does, or how a flame sensor actually works at the physics level, this is where to go.
6. HVAC Guy
Small HVAC business owner with around 64K subscribers, owner's-eye-view content.
HVAC Guy is the day-in-the-life-of-a-one-truck-operation channel. The host runs a small HVAC business in south Georgia and posts five videos a week covering everything from a tricky repair to how he priced a quote to what went wrong on a callback. For techs who are starting to think about going out on their own, this is the closest thing to riding along for a season. The repair content is solid, the business content is honest, and the format is consistent enough that it is easy to binge.
7. HVAC Shop Talk
Hosted by Zack Psioda. Business operations, pricing, and sales.
HVAC Shop Talk is the channel to subscribe to once the technical skills are settled and the question becomes how to run a profitable operation. Zack Psioda covers pricing structures, sales conversations, hiring, marketing, and the operational decisions that separate a barely-paying-the-bills HVAC business from a real company. The format is conversational and the advice is direct.
8. Lennox Learning Solutions
The training arm of Lennox Industries. Manufacturer training and business education.
Lennox Learning Solutions is what happens when a major manufacturer takes training seriously. The content mixes equipment-specific technical training on Lennox product lines with broader sales, business, and customer-service modules. Even non-Lennox techs benefit from the sales and communication content. The pacing is more corporate than the independent channels, but the production quality and depth on the manufacturer-specific material is hard to beat.
9. HVAC-TV
Hosted by Tony Mormino. Commercial HVAC deep dives.
HVAC-TV is the channel for techs who work on or want to move into commercial HVAC. Tony Mormino runs factory tours, interviews equipment engineers, and dives into rooftop units, chillers, VRF systems, and building automation in a level of detail that residential channels never touch. If commercial is where the career is heading, this is the channel that gets you fluent in the equipment, the terminology, and the buying decisions on the commercial side.
10. Smart Service
Field-service management software demos, tutorials, and product walkthroughs.
Smart Service is our own channel. Yes, we put it on our own list. The content is mostly product demos and tutorials for the Smart Service software and our QuickBooks integration workflows. If you are evaluating field-service-management software, or already running Smart Service and want a faster way to learn a feature, the channel is a useful resource. For broader HVAC education, the nine channels above carry the load.
Building the Playlist
If you are just starting out, subscribe to HVAC School, AC Service Tech LLC, and grayfurnaceman first. Add HVACR Videos and Word of Advice TV once you want to see real field decisions. Layer in HVAC Guy and HVAC Shop Talk once you start thinking about the business side. Use Lennox Learning Solutions and HVAC-TV for the equipment-specific and commercial deep dives. The goal is not to watch every video on every channel. The goal is to have a steady drip of useful content on the truck radio between calls. A few related companion reads on this blog: a handful of essential HVAC design books, a breakdown of what HVAC school actually costs, and a guide to NATE practice test resources for techs working on certification.
Smart Service for HVAC
If you are running an HVAC business and want a software stack that handles scheduling, dispatch, customer history, mobile invoicing, and recurring service contracts, Smart Service integrates with QuickBooks Desktop and QuickBooks Online and iFleet keeps techs in the field synced with the office. Try a free demo to see how it fits!
