Mastercool, Inc.

10/26/2026

Need to replace A/C valve cores without discharging the system?

Servicing valve cores under pressure requires the right tools to maintain system charge and keep the job moving.
The Mastercool 58490 Universal R12/R134a Master Kit allows technicians to remove and replace valve cores while the system remains charged.

• Built-in ball valve allows valve core replacement without discharging refrigerant
• Compatible with standard, JRA, and Eaton-style R134a valve cores
• Includes R134a high and low side connectors, multiple shafts, and adapters
• Heavy-duty brass body, stainless steel ball valve, and hardened steel shafts
• Comes with a molded carrying case to keep components organized and protected

From valve core replacement to servicing larger A/C systems, the 58490 provides the tools and adapters needed for efficient service.

Maintain the charge. Replace the core. Get back to work.

Learn more: https://loom.ly/qw33kl0

Mastercool 58490 Universal R12/R134a Master Kit removes and installs valve cores under pressure without refrigerant loss, featuring a stainless steel ball valve and adapters for standard, JRA, Eaton, and GM large-bore cores.

10/25/2026

How can HVAC technicians expand tubing faster while keeping the job precise?

When you are fabricating or installing tubing, having the right sizes on hand and a tool that can handle the work efficiently matters.

The Mastercool 71600-A Tube Expanding Tool Kit uses hydraulic power to fabricate and expand copper, aluminum, and soft steel tubing.

• Hydraulic operation helps reduce the effort required for tube expansion
• Includes seven expander heads from 3/8" to 1 1/8"
• Designed for copper, aluminum, and soft steel tubing
• Includes the Hydra-Swage, small adapter, and inner-outer reamer
• Multiple head sizes give technicians versatility for different applications
• Complete kit stores together in a molded case

Whether you are working on an installation or fabricating tubing for the job, the 71600-A puts multiple sizes and essential tube-working components in one kit.

Expand. Fabricate. Get the connection ready for the job.

Learn more: https://loom.ly/N2M1SCU

10/23/2026

How can technicians pressure-test, find leaks, and refill a cooling system with one kit?

Cooling system service can involve more than simply finding a leak. Technicians may need to pressure-test the system, identify external or internal leaks, remove trapped air, and refill the coolant efficiently.

The Mastercool 43301-A 27-Piece Master Radiator Pressure Test Kit brings those capabilities together in one professional solution.

• Pressure tests cooling systems up to 35 PSI
• Helps locate external cooling system leaks
• Helps identify issues associated with leaking head gaskets or damaged cylinder heads
• Uses vacuum technology to purge trapped air and refill the cooling system
• Includes 19 vehicle-specific adapters for broad domestic and import coverage
• Includes a hand pump, thermometer, universal radiator cap, dual test connectors, and more

Instead of switching between separate tools, technicians can move from testing and diagnosis to vacuum purging and coolant refill with one versatile kit.

Pressure-test. Vacuum-fill. Service with confidence.

Learn more: https://loom.ly/Vgt0qrY

10/14/2026

Mastercool is at Chillventa 2026! We're excited to be exhibiting at Chillventa 2026 in Nuremberg, Germany, this week! We’ll be here through tomorrow.

Our team is excited that we’re connecting with HVAC/R industry professionals and showcasing Mastercool's tools and equipment. We're enjoying the opportunity to meet with industry experts and share our solutions.

If you're attending Chillventa, stop by and say hello! We'd love to connect. You can find out more about the show here: https://loom.ly/hQI2x4Q

See more of our upcoming trade shows: https://loom.ly/wA8dz3k

10/05/2026

How do you choose the right A/C service tool for the job?

The best tool is not always the most complicated one. It is the one designed for the system, refrigerant, and service you are performing.

Before reaching for your tools, consider:
What refrigerant are you servicing? Make sure your equipment is compatible with the refrigerant in the system.

What service are you performing? Diagnosis, evacuation, recovery, charging, leak detection, and tubing work require different equipment.

What level of accuracy do you need? Choose instruments designed to provide the measurements your specific service requires.

Is the tool designed for professional use? Durability matters when equipment is used day after day.

Right system. Right refrigerant. Right tool.

Explore professional automotive A/C and HVAC/R service solutions from Mastercool.

Learn more on our site https://loom.ly/lzNvdpk

09/30/2026

Why have professionals trusted Mastercool A/C and HVAC/R tools for over 40 years?

Four decades in the industry represents more than a milestone. It represents years of developing, refining, and manufacturing tools for professionals who depend on their equipment every day.

For over 40 years, Mastercool has remained focused on:
• Innovation in A/C and HVAC/R service equipment
• Professional-grade quality
• Tools designed around real technician needs
• Serving automotive and HVAC/R professionals around the world
Technology has changed. Refrigerants have changed. Service requirements have changed.
Our commitment to world-class quality and professional performance remains.

Over 40 years of Mastercool — and we're still building what's next.

Learn more about us here: https://loom.ly/l6Oo9DQ

09/28/2026

What professional A/C tools work in both the shop and the field?

The environment may change, but the expectations do not.

Technicians need tools that can handle real-world service work, whether they are working under the hood, inside a mechanical room, or out on a jobsite.

Mastercool tools are made to work where you work.
• Automotive repair shops
• HVAC/R service calls
• Refrigeration applications
• Mobile A/C diagnostics and service
• Professional maintenance environments

From diagnosing problems to completing the service, Mastercool gives professionals the tools to keep moving.
Shop. Field. Jobsite. Mastercool.

09/23/2026

What makes Mastercool Black Series tools different?

Professional technicians need more than tools that simply look good in the toolbox. They need equipment designed for accuracy, durability, and demanding everyday work.

That is what the Mastercool Black Series is built around.
• Professional-grade performance
• Designed with working technicians in mind
• Built for demanding A/C and HVAC/R applications
• The quality and innovation professionals expect from Mastercool

For technicians who take their tools as seriously as they take their work, look to the Mastercool Black Series.

See Black Series here https://loom.ly/8EfIfao

09/21/2026

How can technicians find refrigerant leaks faster and more accurately?

A refrigerant leak can turn a routine service call into a frustrating search. Having the right detection equipment helps technicians pinpoint the problem and move the job forward.

Meet the Mastercool 55600-A Black Series Infrared Refrigerant Leak Detector.

Designed for professional A/C and HVAC/R technicians, this Black Series tool provides a dependable solution for refrigerant leak detection.

• Infrared leak detection technology
• Designed for professional refrigerant service
• Part of Mastercool's Black Series line
• Built for automotive A/C and HVAC/R applications

When finding the source of a leak matters, put professional detection technology in your hands.

Find the leak. Fix the problem. Get the system back to work.

Learn more here https://loom.ly/CVYb2bM

09/16/2026

What tools do technicians need for modern automotive A/C service?

A/C technology continues to evolve, and the equipment used to service it needs to evolve with it.
Mastercool develops professional tools and equipment for technicians working with today's air conditioning systems and refrigerants.

Built for modern A/C service:
• Tools for newer refrigerant applications
• Equipment designed around technician needs
• Solutions for diagnostics, recovery, charging, and service
• Professional-grade construction made for everyday use

New systems. New service requirements. The same need for accuracy, reliability, and quality tools.
Mastercool is ready for what's next.

See our automotive products here: https://loom.ly/K9CRb0I