Magnetic Tool 4+

Test AC & DC Solenoid Coils

Danfoss A/S

Designed for iPad

    • 2.8 • 18 Ratings
    • Free



Magnetic Tool is now part of the new Ref Tools app, our essential, all-in-one mobile app for air conditioning and refrigeration technicians. Ref Tools gives you access to the tools, guidance, support, and information you need—on the job and in the field.

Download Ref Tools to access the latest version of Magnetic Tool.

Ensuring that a solenoid valve coil is working properly, or detecting a faulty one, is an important step in many repair or installation projects. Magnetic Tool makes testing a solenoid valve coil quick and easy. Just open the app, hold your smartphone up to the solenoid coil you want to test, and watch for the wheel in the app to start spinning. If it rotates, your solenoid valve is good to go.

If a solenoid valve is in a tough-to-reach space, you can also set Magnetic Tool to provide audio or haptic (or both) feedback when it detects a magnetic field. That way, you can check on a valve without seeing your screen, so you can maneuver your phone any way you need to.

Magnetic Tool has two modes: Simple and Advanced. With Simple mode, all you need to do is open the app and start testing—it's that simple. Advanced mode allows you to adjust the threshold tolerances of the magnetometer, which is most often used to reduce or eliminate interference from other nearby solenoid valves.

Magnetic Tool is part of the Danfoss CoolApps Toolbox, a collection of mobile apps designed to help installers and service technicians with their daily tasks. See the full collection at

For app support, please use the in-app feedback function found in the app settings or send an email to

Engineering Tomorrow
Danfoss engineers advanced technologies that enable us to build a better, smarter and more efficient tomorrow. In the world’s growing cities, we ensure the supply of fresh food and optimal comfort in our homes and offices, while meeting the need for energy-efficient infrastructure, connected systems and integrated renewable energy. Our solutions are used in such areas as refrigeration, air conditioning, heating, motor control and mobile machinery. Our innovative engineering dates back to 1933 and today, Danfoss holds market-leading positions, employing 28,000 people and serving customers in more than 100 countries. We are privately held by the founding family. Read more about us at

Terms and Conditions apply for use of the app.

What’s New

Version 2.4.0

Improved threshold for calibration
Warning that the app will only run on supported devices
Changes and improvements

Ratings and Reviews

2.8 out of 5
18 Ratings

18 Ratings

Caliber81 ,

Don’t work and freezes at the start

This app doesn’t even work on my XS. Freezes as soon as you open it. Have to slide the screen up to make it start like I’m closing my page. Freezes and just goes back to the Home page. Any other apps besides this faulty one?!?!

Developer Response ,

We are very sorry you were experiencing trouble with our app. We have released a new version of it today, and hope that this will resolve your issue. Please do not hesitate to reach out to us either here or via email at if you continue to experience problems

American workers ,

What a great app.

I have enjoyed using this app love my coworkers / customer reactions every time. “Wow what thats do” , i just asked that the app have an update for us magnet freaks and have a pole induction N or S but that’s for another hobby. I have had 1 problem w: app that was fixed Thru Font had changed it to small then app no work.

Developer Response ,

Hi, thank you for your feedback. We are very happy you (and your coworkers and customers, it seems) are enjoying the app. We have noted that you would like the pole indication included and we will consider adding it in a future update to the app. Should you have any more improvement suggestions, please do not hesitate to get back in touch with us.

Smitty Mcducttape ,

Works great

I have an iPhone 5. Don’t know if that is what makes mine work great, but it does. I do industrial refrigeration for a living and this is more than handy. Thank you !!

Developer Response ,

Thank you for the review! Happy to hear it is working so well for you. It is nice to know it is making a difference in your daily work. We are working on making sure the app will work as expected across all iPhone models as there seems to be a problem on the XS range. Please let us know if you have any suggestions for improvement.

App Privacy

The developer, Danfoss A/S, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

More By This Developer


You Might Also Like