Zach Mills went from Army infantry to over four million dollars in HVAC installed sales in just three years. In episode 66 of The Wisdom of Wrench Podcast, host Kevin Comerford sits down with one of the top service technicians in the country to find out exactly how he did it.

Mills breaks down the mindset shift that changed everything for him, why he treats every single maintenance call as an opportunity, and how he builds real trust with homeowners through honest communication, humor, and the right questions. He talks about what he learned from Dale Carnegie, how he surrounds himself with greatness, and the simple habits that helped him generate massive tech lead revenue as a comfort advisor pipeline at Morris Jenkins.

Whether you are a newer technician trying to grow or a veteran looking to push past a plateau, this one is worth every minute. Hit play and see what is possible when you stop being robotic and start being real.

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Spotify: https://open.spotify.com/show/0UvJLcLFL03vKiLpd1xN45?si=PRBF-DwYR_uDtfRB8hIsLg

Apple Podcasts: https://podcasts.apple.com/us/podcast/wisdom-of-wrench-podcast/id1792919657

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Chapters:

0:00 - $4M HVAC Tech Story: “Every Call Is an Opportunity”

0:32 - WOW Podcast Intro + What “Tech-Generated Lead Revenue” Means

1:50 - Meet Zach “Mills” Mills: \#2 in the Country at Morris Jenkins

3:58 - Army to HVAC: Why He Chose the Trades (Not College)

8:13 - Starting with Almost No Training: Learning Fast on the Job

9:22 - Why He Switched to Morris Jenkins (Work-Life Balance + Support)

11:59 - Year 1 Reality: “Middle of the Pack” to Breakout Potential

15:07 - The Breakthrough Formula: Mentors + Books + Immediate Implementation

19:34 - Communication That Closes: Likeability + Answer Questions with Questions

23:29 - Who You Hang Around Matters: Avoid Complainers, Chase Greatness

28:30 - 2025 Mindset Shift: Dig for the “Why” + Get Permission to Advise

33:45 - How to Not Be Robotic: Humor + Being a Real Person

40:03 - Staying on Top: Ruts, Self-Accountability, Control the Controllables

53:37 - The 50/50 Rule: Talking vs Working (Education Builds Trust)

56:42 - Language That Sells: “We/Us” + “Investment” + Fit the Homeowner’s Plan

1:01:02 - Creating Urgency Without Pressure: Photos + “Stay in Control” Framing

1:06:56 - The “Test Call” That Became 3 Systems + Ductwork + Generator

1:09:21 - Kevin’s Recap: The 5 Biggest Takeaways to Copy Today

1:16:04 - Final Words: Bigger Future, Keep Running the Play