Danfoss Troubleshooter vs CORE Service
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Danfoss Troubleshooter
This app helps HVACR technicians diagnose and resolve system issues. It guides users through common symptoms, identifies potential causes, and recommends solutions. An offline database is available for use in remote locations.
- Diagnose HVACR system issues
- Identify common symptoms
- Recommend solutions
- Offline database access
- Streamlined interface
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Troubleshooter 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 Troubleshooter. Troubleshooter helps you diagnose and resolve many issues that pop up in HVACR systems. Through a streamlined and easy-to-navigate interface, you can check on specific parts of a system and search through the most common symptoms. Once you’ve identified the problem, Troubleshooter recommends possible solutions for you to try. Troubleshooter is a valuable, time-saving app for installers and service technicians, enabling you to quickly resolve service calls and move on to the next one. You can also download Troubleshooter’s database, so you can use it with or without an internet connection—which is great for remote service destinations. How to use Troubleshooter When you start up Troubleshooter, you’ll see a refrigeration system divided into four main areas: low pressure, high pressure, compressor, and liquid line components. Select one of the four areas and you will be able to search through potential symptoms for that area in the system. Once you identify the correct symptom, Troubleshooter will show you the possible causes for that symptom and the steps required to correct it. It’s easy to move back and forth between the symptom/cause and the solution pages. Support For app support, please use the in-app feedback function found in the app settings or send an email to coolapp@danfoss.com 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 www.danfoss.com. Terms and Conditions apply for use of the app.
CORE Service
This app provides a wireless interface for commercial HVAC technicians to control and service specific Lennox rooftop units. It offers guided setup, enhanced testing, and parameter configuration to streamline the service process.
- Wireless mobile service app
- Guided setup with progress indicators
- Enhanced test functionality
- Real-time sensor readings and trending
- Parameter configuration
- Exportable setup summaries
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This app is the interface for the Lennox® CORE Unit Controller in Model L (L*M), Enlight (L*T), Xion (L*X) and Strategos (S*H) Commercial Rooftop Units. You must be within 25ft of a unit to connect and utilize this app. The Lennox® CORE Control System reinvents the service process in the palm of your hand with a wireless mobile service app, making setup and service faster than ever before. This app is intended for commercial HVAC service technicians to interface with CORE Unit Controller equipped unitary packaged rooftop units. App Features: - Guided Setup with progress indicators, detailed help, and exportable summaries drive simple and trouble-free setup, reducing commissioning times over similar systems. - Enhanced Test Functionality provides real-time sensor readings, trending, and reports that enable easy troubleshooting. - Ability to set and configure parameters of the CORE Control System drive tailored sequences of operation and make the CORE Unit Controller the most flexible Lennox has to offer.
Screenshots
Verdict
Danfoss Troubleshooter and CORE Service both sit at 3.7 stars, but that hides the real split: 100% of Danfoss Troubleshooter's written reviews are positive against 0% of CORE Service's. Danfoss Troubleshooter also leads on iOS requirement (11.0 vs 15.6). CORE Service's advantage is ratings volume (19 vs 3). On price, rating, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 3.7 for Danfoss Troubleshooter against 3.6 for CORE Service. That said, the two scores are not equally well evidenced: CORE Service has 19 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 100% of Danfoss Troubleshooter's written reviews are positive against 0% of CORE Service's.
Danfoss Troubleshooter ships an update every 5 months, CORE Service every 3 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.
| Parameter | Danfoss Troubleshooter | CORE Service |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | 3.6 (19 ratings) |
| Positive reviews | 100.0% of reviews — better | 0.0% of reviews |
| Number of ratings | 3 | 19 — better |
| Update frequency | Every 5 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 56 MB | 47 MB |
| Age rating | 4+ | 4+ |
| Developer | Danfoss A/S | Lennox Industries |
Customer experience
Danfoss Troubleshooter
CORE Service
In-app purchases
Danfoss Troubleshooter
No in-app purchases
CORE Service
No in-app purchases
Questions
Is Danfoss Troubleshooter free?
Is CORE Service free?
Which has better reviews, Danfoss Troubleshooter or CORE Service?
Do Danfoss Troubleshooter or CORE Service have ads?
Which is updated more often, Danfoss Troubleshooter or CORE Service?
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