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About LJ Refrigeration Co.

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(480) 948-5004

Since 1981, LJ Refrigeration Co. has been the trusted name in heating and air conditioning, proudly serving Scottsdale and Arizona’s northeast valley. As a third-generation, family-owned and operated business, we are deeply committed to delivering top-tier HVAC solutions while building lasting relationships with our customers through expert craftsmanship, prompt service, and unwavering integrity.

Additionally, as part of our commitment to sustainability, we have transitioned to a paperless company and exclusively install Energy Star-rated equipment to promote energy efficiency and environmental responsibility.

LJ Refrigeration Co. is honored to have been an A+-rated service company with the Better Business Bureau for over 40 years, a testament to our dedication to excellence and customer satisfaction. We proudly serve Scottsdale, Cave Creek, Carefree, Rio Verde, Fountain Hills, North Phoenix, and Paradise Valley, continually expanding our reach to bring quality service to more homeowners.

A Legacy of Excellence

LJ Refrigeration Co.'s story began in the cold winters of Minnesota when Lyle and Karyl Engbarth founded the company, selling and repairing heaters. Seeking new opportunities, they relocated to Arizona, where their son, Jeff Engbarth, joined the business and helped expand its reach. Over time, the company grew into a trusted name in heating and cooling, earning a reputation for excellence and integrity.

As the business evolved, Paul Coen and his wife Jennifer became integral to its continued success, ensuring the family’s commitment to quality service remained strong.

With each generation, we remain dedicated to our founding values—expert craftsmanship, customer-first service, and an unwavering commitment to home comfort.

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(480) 948-5004

Meet The Team

As a third-generation owner in the family HVAC business, Paul brings nearly 30 years of hands-on experience to the company. He grew up in the trade and still enjoys getting his hands dirty in the field, making sure every job is done right. Paul's deep knowledge, strong work ethic, and commitment to customer satisfaction are at the heart of the business.
When he’s not working, you’ll find Paul spending time with his two dogs, vacationing with his wife, or exploring the outdoors. He’s also a die-hard football fan—Go Cardinals!

Owner

Paul

Jennifer has been a driving force behind the scenes for nearly 30 years, keeping the office—and the business—running smoothly. Known affectionately as the “Paperwork Princess,” she handles everything from scheduling to logistics with precision and care. Jennifer also loves the chance to step out of the office to deliver parts or equipment, giving her the opportunity to meet the customers she's gotten to know so well over the phone.
Outside of work, Jennifer enjoys traveling, discovering great local restaurants, and spending time in her happy place—Sedona.

Owner

Jennifer

Lauren is likely the first voice you’ll hear when you call—she handles scheduling and dispatching with a friendly and efficient touch. Behind the scenes, she’s busy processing warranties, registering equipment, managing our financing department, and jumping in wherever she’s needed to keep things running smoothly.
Outside of work, Lauren is a proud and busy mom to two energetic little boys. When she finds a spare moment, she enjoys working out and getting lost in a good book.

Office Manager

Lauren

Jason has been a vital part of our team for nearly 10 years, bringing skill, efficiency, and a strong work ethic to everything he does. As our Service Manager, he leads the team with a calm, knowledgeable presence and ensures that every service call is handled with the highest level of care and professionalism. Whether he's troubleshooting in the field or mentoring newer techs, Jason sets the standard for quality and reliability.
After working through Arizona’s long, hot summers, he looks forward to vacationing with his wife. When he's home, you’ll usually find him working on a new DIY project—he’s just as handy off the clock as he is on it.

Service Manager

Jason

Jace may be the newest member of our team, but he’s already made a big impact. With a great skill set, strong work ethic, and a friendly, personable attitude, he’s quickly become an asset to the company. Always eager to learn and willing to put in the long hours, Jace continues to grow and improve every day.
Outside of work, Jace enjoys gaming and spending time with his family.

HVAC Technician

Jace

Customer Testimonials

Hear directly from our customers about the quality, honesty, and care we bring to every job.

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These guys are great! Been a customer for many years and could not be happier.

Dan S.

The best in every regard.

Chris T.

They do great work and always fix what is needed.

Michael S.

You guys are AWESOME! Definitely recommend!

Courtney E.

Outstanding HVAC company in Scottsdale area. They are super friendly and highly professionals. Highly recommended!!

Mandeep B.

Best best best… 100% recommended

John W.

These guys are the best, professional, quick, very friendly and most of all Honest. We have dealt with L&J a few times in the last few years and would definitely recommend, trust and use again.

Russell H.

Honest, professional, always on time, and fair pricing. As good as it gets!

Mark H.

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