HVAC School - For Techs, By Techs

In this episode, Bryan welcomes back Trevor Matthews from Refrigeration Mentor for a conversation focused entirely on nailing a job interview in the HVAC and refrigeration trades — whether it's a technician's very first shot at breaking into the industry or an experienced tech looking to move to a new company or specialty. Trevor opens up about his own rocky start, admitting he cycled through roughly 25 different jobs before landing in refrigeration and that he struggled with confidence in early interviews because he assumed he needed a deep resume of experience. What actually got him hired, he says, was being coachable: showing up willing to learn and do what was asked, even if that meant starting by sweeping floors.
For technicians just entering the trade, Bryan and Trevor lay out a practical playbook. Research the company before reaching out — knowing what services they offer, how long they've been in business, and what type of work they do builds instant trust. Cast a wide net rather than sending out only a handful of applications, and don't get discouraged by rejection; both hosts stress "pleasant persistence" as the key to standing out, following up warmly without becoming a nuisance. Trevor shares a story about motivational speaker Les Brown showing up at a radio station day after day until he finally got a chance, as a reminder that repeated, respectful effort pays off. They also recommend creative approaches like recording a video resume tailored to a specific company, and getting ahead on certifications such as EPA 608, confined space, first aid, or defensive driving before ever applying, since these small credentials can make a hiring manager's decision much easier.
The conversation then shifts to technicians pursuing their next opportunity rather than their first. Bryan explains that many larger companies route candidates through HR before they ever speak with a service manager, and that each conversation requires a different tone: HR wants to hear about safety, a clean driving record, and reliability, while a service manager wants to know how you'll bring value to customers and the team. Both agree that driving records have become a surprisingly major factor in hiring, given how much liability and cost a company takes on with every vehicle on the road. They also encourage candidates to ask people already working at a company for an internal referral, since a warm introduction dramatically increases the odds of getting hired, and many companies even offer referral bonuses that make current employees eager to help.
Finally, Trevor and Bryan get tactical about interview performance itself. They recommend using AI tools to generate likely HR and technical interview questions, then practicing out loud with a spouse or friend to shake off the "rust" of not having interviewed in years. Confident humility comes up repeatedly: it's far better to admit "I don't know that term" than to bluff, and to speak with genuine curiosity about the trade rather than reciting a list of accomplishments. Trevor illustrates how a candidate can talk through a hypothetical service call step by step to demonstrate real troubleshooting knowledge, even without hands-on experience in that specific niche. The pair close by touching on soft skills like conflict resolution and building good relationships with dispatch, and Trevor shares where listeners can connect with the Refrigeration Mentor community for more training and support.
Topics Covered
Why Trevor initially struggled with confidence in early job interviews
Researching a company before applying or interviewing
Casting a wide net and using "pleasant persistence" instead of giving up after a few no's
Standing out with a tailored video resume
Getting certifications early: EPA 608, confined space, first aid, defensive driving
Why driving records and vehicle safety matter so much to HVAC/R employers
The difference between talking to HR versus a service manager
Asking a current employee for an internal referral
Avoiding negativity about past employers during interviews
Using AI to prepare likely interview questions, then practicing with a real person
Confident humility: admitting what you don't know instead of bluffing
Demonstrating resourcefulness through podcasts, courses, and industry resources
Talking through a hypothetical service call to show troubleshooting ability
Soft skills, conflict resolution, and building relationships with dispatch
Trevor's own story of landing his first refrigeration job in Australia
Where to connect with Trevor and the Refrigeration Mentor community
 
Learn more about all the great resources Trevor offers through Refrigeration Mentor at https://refrigerationmentor.com/.
Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool
Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.
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This short podcast episode is Tyler Nelson's Bry-X presentation from the 7th Annual HVACR Training Symposium: Digital Tools and AI - "So Happy Together." Tyler is the Business Development Manager and Global Trainer at Sauermann Americas.
Artificial intelligence (AI) is measured data, not an authority, and it will not replace techs. It may enhance technicians' abilities but must be used responsibly. AI operates on clear logic and supplies pattern recognition, what-if analysis, and decision support (but NOT decision ownership). The technician ultimately owns decision authority and technical judgment, but AI helps save time. Modern AI reinforces best practices, flags inconsistencies, and cross-references industry data, meaning it amplifies experience rather than replacing it.
HVAC technicians' work depends on codes and standards, physics, and diagnostic cause and effect, which all have repeatable workflows; AI provides instant analysis and verification in those key areas. We already have a wealth of data from our tools and manufacturers' literature, and AI connects those to help us make decisions; technicians fear being incorrect or missing diagnostic factors, and AI can help us assimilate data by connecting data sources and ensuring that all angles are covered. It closes interpretation gaps and gives us the framework to make constructive decisions.
measureQuick is an example of a diagnostic app that integrates AI in its workflows; it is leading the way in terms of digital tools and AI integration, and it gives technicians a lot of power in the field. Apps that use AI with digital tools help us navigate the industry as equipment becomes more complex, and they save time by making your work faster and more accurate. These tools come at a cost, but those costs can be spread across flat diagnostic fees and service agreements. Feeding readings from these apps into AI can also help you understand gaps in your own thinking and understand the relationships between the tools' readings and the field reality. AI can also take the data and provide technicians with scripts that are easy for customers to understand.
If you give AI specific prompts and data, including images, equipment data, tool data, and commands to include or exclude certain sources (such as excluding crowdsourced information), you can learn a lot about the system in front of you. It can also help you interpret images or videos. These functions of the tool can help us question our own assumptions, expand our understanding of field problems, and vet our decisions.
 
Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.
Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.
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Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this episode, Bryan leads a live team meeting focused on getting technicians mentally and practically ready for the summer rush. He opens by asking the group to name what makes the season different, and the answers pile up quickly: higher call volumes, hotter attics, more irritable customers, and a nagging pressure to move faster than usual. Bryan distills these observations into a central theme that runs through the entire conversation — the tension between speed and thoroughness, and how the desire to rush during the busy season is the root cause of most costly mistakes and callbacks.
A major thread of the discussion is the idea of "sharpening your ax" before the season's workload hits full force. Bryan pushes the team to build real confidence in their tools rather than assuming they work correctly. He walks through practical habits: verifying that a leak detector is properly calibrated, understanding its components well enough to troubleshoot it, and periodically checking a vacuum pump with a micron gauge so a technician instinctively knows what normal performance looks like. He also shares a story about a mentor named Howard Erskine, using it to illustrate how small, deliberate routines — from hose-rolling technique to truck organization — compound into real speed without sacrificing accuracy.
The conversation then turns to drain lines and diagnostic philosophy, centered on Bryan's "wide, narrow, wide" framework. He explains that rushing tends to collapse a technician's focus into the narrow middle step — fixing only the immediate complaint — while skipping the wide assessment before and after the repair that catches secondary issues like sagging platforms, damaged insulation, or drainage problems before they become bigger failures. A detailed real-world example involving an oversized system in a heavily shaded, lakeside home shows how factors outside a standard load calculation, like mature trees and humidity, can explain why equipment isn't "keeping up" even when nothing is actually broken.
Bryan closes by connecting these technical habits to business outcomes, urging technicians to fully document and resolve issues rather than telling clients to "keep an eye on it." He frames average ticket size, callback rate, and time on call as honest indicators of thoroughness rather than sales pressure, and encourages the team to lean into detailed measureQuick reports, thermal imaging, and clear client communication so that no problem gets punted down the road. He wraps up with an honest, encouraging note about the grind of the summer season, reminding the crew that the long hours are temporary and that consistent, unhurried practices are what ultimately make the season more profitable and less stressful.
Topics Covered
What makes the summer HVAC season uniquely difficult, from heat and call volume to mental fog and burnout
The connection between rushing and increased callbacks, mistakes, and missed opportunities
"Sharpening your ax" — preparing tools and routines before the busy season hits
Properly calibrating and understanding leak detectors, including the H10
Using a micron gauge to verify vacuum pump performance and knowing when to change pump oil
Building personal routines and truck ergonomics to work faster without losing accuracy
Common and costly drain line issues, including float switches, double traps, and pitch problems
The "wide, narrow, wide" troubleshooting framework for full-system diagnosis
A case study on an oversized system in a shaded, lakeside home and how site conditions affect load
Handling clients who report a system "not keeping up," including thermostat lookers vs. comfort-focused clients
Using measureQuick reports and third-party verification to build client trust
Evaluating ductwork, insulation, and equipment sizing as part of a full home assessment
Why documenting a clear path forward beats telling clients to "keep an eye on it"
Average ticket size, callback rate, and time on call as indicators of technician thoroughness
Maintaining a healthy mindset and work-life balance through the demands of summer
 
Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.
Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.
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In this short episode from the Bry-X stage of the 7th Annual HVACR Training Symposium, Tessa Murry gives a class on building science basics: The House Always Wins! Tessa is a building scientist who works with TEC.
Tessa's class is about how the house puts HVAC contractors in difficult situations. When people have indoor air quality or comfort concerns, the HVAC often takes the blame, even if the issue is with the house. There are usually several little home improvement decisions that create unintended consequences and add up. In many cases, when there aren't exhaust fans in kitchens and bathrooms, moisture stays inside and can cause indoor condensation. Air-sealing, adding or removing insulation, replacing windows, replacing furnaces with a different efficiency model, and even moving people in can all affect comfort and air quality.
Comfort issues and complaints, such as hot and cold spots, often point to issues with the house, not necessarily just the HVAC system. Pressure boundaries and thermal boundaries in the building envelope need to be aligned, continuous, and consistent for HVAC systems to do their job well, but many houses don't have that. Those boundaries need to be clear between attached spaces like attics or garages. Those spaces create problems with energy efficiency and comfort, and humidity is a problem in some climates. Garages also have fumes we want to keep out of the house. 
Heat moves from hot to cold, and air moves when there is a pressure differential. Mechanical equipment and wind can drive pressure differentials. If there is a pressure difference and a hole, there will be air movement. In the winter, cold air sinks and displaces warm air, which rises and creates positive pressure at the top of the house. That air will push through gaps around can lights, vents, and more. When that humid air gets into a cold attic, the moisture will condense on the roof decking surface and cause an ice dam to form. In the summer, hot, humid air comes into the structure. Regardless of the house's issues with air movement, it's on HVAC contractors to make the decisions that put the occupant's health and safety first, including calling the contractors with the knowledge to diagnose the house's problem.
 
Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.
Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.
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Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.

In this episode, Bryan sits down with compressor teardown specialist Ty Branaman for a deep dive into what really kills refrigeration and AC compressors. After some lighthearted banter, the conversation quickly turns technical: Ty has spent years cutting apart failed compressors on video, and he explains why that practice matters so much. As he puts it, he is "all about making the invisible visible" — once a technician actually sees what happened inside a dead compressor, vague explanations like "it just got old" stop holding up.
Bryan and Ty establish that a properly maintained compressor should essentially last forever, since it is a sealed system with no external contaminants — unlike an engine. The catch is that installation and service mistakes introduce the very contaminants that shorten its life. Copper plating tops Ty's list of the most common findings: moisture combines with POE oil to form acid, which etches copper that then plates onto moving parts, thickening them and eventually causing hard starts that get mistaken for a "tired" compressor. They also trace how a shorted or seized compressor is usually the end result of an earlier root cause, not the cause itself.
The two work through the major categories of contamination one by one: solid debris from unswept lines and copper shavings left behind during deburring; moisture, which requires a proper pressure test, deep vacuum, and decay test to remove, plus heat to actually drive water molecules out; and non-condensable gases like oxygen and nitrogen, which throw off pressure readings and, with flammable A2L refrigerants, introduce real fire risk. Ty shares a memorable story about a compressor shell that ripped open after being left pressurized with nitrogen, and both discuss the surprisingly common problem of "wet" nitrogen and poorly maintained recovery tanks.
The conversation closes on flooded starts — a hazard Ty considers hugely overlooked — where migrated liquid refrigerant mixes with crankcase oil and violently flashes to vapor on startup, often shattering scroll plates. They cover practical prevention methods, including crankcase heaters, pump-down solenoids placed ahead of the metering device, and reduced refrigerant charges, before wrapping up with Ty's quick field technique for cutting the top off a failed compressor to get an on-the-spot diagnosis rather than waiting on a full teardown back at the shop.
Topics Covered
Why compressors fail from external contamination rather than simply "wearing out"
Copper plating as the most frequently found problem inside failed compressors
Solid contaminants: dirt, copper shavings, and proper deburring technique
Moisture control: pressure testing, deep vacuum, decay testing, and heat-assisted evacuation
Wet nitrogen and poorly maintained recovery tanks
Oxygen and nitrogen contamination, including flammability risks with A2L refrigerants
Flooded starts, crankcase heaters, and pump-down solenoids
Superheat measured at the compressor versus at the evaporator outlet
Ty's quick-cut technique for on-the-spot compressor diagnosis in the field
 
Have a question that you want us to answer on the podcast? Submit your questions at https://www.speakpipe.com/hvacschool.
Purchase your tickets or learn more about the 8th Annual HVACR Training Symposium at https://hvacrschool.com/symposium.
Subscribe to our podcast on your iPhone or Android.
Subscribe to our YouTube channel.
Check out our handy calculators here or on the HVAC School Mobile App for Apple and Android.