Basic Refrigeration Circuit February 21, 2026, 4:38 pm - HVAC School

Sign In

Search In:

Event Videos Tech Tips Apps Books Podcasts Users

HVAC Feed
Resources
Content
- Start
- Podcasts
- Videos
- Social Media
- Tech tips
- Quizzes
Courses
Events
Jobs
- Create a Job Post
- Job Posts
Shop
Partners

Search In:

Event Videos Tech Tips Apps Books Podcasts Users

English▼

+

Chinese (Simplified)

Sign In

Get Tech Tips

Subscribe to get free tech tips.

BACK

Basic Refrigeration Circuit February 21, 2026, 4:38 pm

February 21, 2026

Print Friendly, PDF & Email

Share this Tech Tip:

Check out our most recent video

How to Evacuate an AC system, Full Vacuum Procedure

Our latest Podcast

HVAC School – For Techs, By Techs

HVAC School – For Techs, By Techs

Real training for HVAC ( Heating, Ventilation, Air Conditioning and Refrigeration) Technicians. Including recorded tech training, interviews, diagnostics and general conversations about the trade.

Hard Lessons w/ Roman, Tim D., Nathan O. and ELK

byBryan Orr

Join industry veterans Tim De Stasio, Roman Baugh, Eric Kaiser, and Nathan Orr as they share their most memorable HVAC lessons learned the HARD WAY. This unfiltered conversation from the 7th Annual HVAC/R Training Symposium reveals the real stories behind costly errors, dangerous situations, and valuable HVAC training moments that shaped their careers.

What You’ll Learn:

Critical refrigerant handling mistakes and their consequences
Combustion safety lessons that could save lives
Chemical safety protocols every technician must know
Equipment installation errors and how to avoid them
Real-world troubleshooting failures and solutions

From seized compressors and ruptured refrigerant lines to dangerous gas leaks and combustion incidents, these HVAC professionals hold nothing back. Each story comes with crucial HVAC/R lessons that can help you avoid making the same mistakes.

Whether you’re a seasoned technician or just starting your HVAC career, these hard-earned insights will help you work safer, smarter, and more professionally.

Remember: The best lessons are often learned the HARD WAY by others. Learn from these experiences so you don’t have to repeat them!

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 7th 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.

Hard Lessons w/ Roman, Tim D., Nathan O. and ELK

Search Episodes

Hard Lessons w/ Roman, Tim D., Nathan O. and ELK

03/31/2026

Bryan Orr

Better Seen than Viewed w/ Jim Bergmann

03/26/2026

Bryan Orr

Symposium – What Good Techs Do Different W/ Data

03/24/2026

Bryan Orr

Heat Recovery from Data Center w/ Jeff Staub

03/19/2026

Bryan Orr

All About ESCO with Renee Tomlinson and MeasureQuick’s Latest Features with Jim Bergmann

03/17/2026

Bryan Orr

Building Tools & the Trade w/ Tony G. from Fieldpiece

03/12/2026

Bryan Orr

Symposium – Do Inverters Suck?

03/10/2026

Bryan Orr

Recovery Pro Tips w/ Jesse from NAVAC

03/05/2026

Bryan Orr

Symposium – What is the House Trying to Tell Me?

03/03/2026

Bryan Orr

Don’t Die! w/ Louise from UEi

02/26/2026

Bryan Orr

Search Results placeholder

Check our latest Tech Tips

Beware of "Ghost" Voltage How Moisture Moves Maintenance During Major Repairs

VIPER SNIPER UNIVERSAL AEROSOL TRIGGER SPRAYER

VIPER SNIPER UNIVERSAL AEROSOL TRIGGER SPRAYER The Viper Sniper is an ergonomic trigger sprayer that fits all standard aerosol cans. Designed for comfort and control, it reduces finger fatigue and delivers a smooth, consistent spray, especially in those hard-to-reach areas. Features quick-attach side clips for easy, secure use. Compatible with all standard aerosol cans —including Viper Aerosol Coil Cleaner and Coil Coating Spray. Fits Any Aerosol Can Full Hand Ergonomic Grip Easily Clips On and Off 2 Sprayers per pack

VENOM PACK CONDENSER PURE CONCENTRATE COIL CLEANER

VENOM PACK CONDENSER PURE CONCENTRATE COIL CLEANER Venom Pack Condenser Cleaner is a high foaming pure concentrate liquid designed to tackle the toughest soils. The proprietary blend of specialty detergents will liquify heavily embedded grease and grime to restore heat transfer and increase the efficiency of the coil.

Viper Condensate Pan and Drain Treatment

Viper Condensate Pan and Drain Treatment Viper Condensate Pan and Drain Treatment is a sprayable gel. It coats the pan, p-trap and drain piping with a lubricative film to improve flow and prevent future soil adhesion. The slow dissolving enzyme gel will outperform and outlast conventional tablets and strips.

Nylog Blue Gasket -Thread Sealant for AC/R Systems

Nylog Blue Gasket -Thread Sealant for AC/R Systems One drop of Nylog on your rubber hose gaskets prior to attaching your core tools, hoses or vacuum gauge will assure that things do not bind or leak during evacuation. Derived from refrigeration grade lubricants. Non-hardening, non-drying fluid which bonds tenaciously to many different substrates. Typically, one drop of Nylog can be stretched about three feet before breaking.

NAVAC

Find out more about the Innovative NAVAC line of Vacuum Pumps

Fast-Stat

Santa Fe

UEI

Comments

To leave a comment, you need to log in.

Related Tech Tips

Careful With That 40VA Transformer Read more

Understanding Relays With the 90-340 Read more

The Two OTHER EPA violations Read more

More tech tips

loading

To continue you need to agree to our terms.

Terms and Conditions

Yes No

The HVAC School site, podcast and tech tips
made possible by generous support from

Interested in a HVAC Career?

Find A local trade school

Resources

Calculators
Tool list
Apps
Great Books
Software and Business
Other Resources we like
Unconformed

Content

Start
Podcasts
Videos
Social Media
Tech Tips
Quizzes
Courses

Events

6th Annual HVAC/R Training Symposium
Upcoming Events
Create an Event
Event Partnership

Jobs

Job Posts
Create a Job Post

Partners

Partners
AHR Expo
Carrier
Copeland (Emerson)
FAST-STAT
Fieldpiece
NAVAC
Refrigeration Technologies
Santa Fe
TruTech Tools
UEi Test Instruments

Get Tech Tips

Subscribe to get free tech tips

Email Address

First Name

Terms and conditions & Privacy Policy
EULA
Reuse License

©2026 - HVAC School | All rights reserved