Testo 557s vs Testo 558s

Testo 557s vs Testo 558s: Out with the Old, In with the New for Aussie HVAC Techs

HVAC professionals across Australia have long trusted the Testo 557s digital manifold. Known for its reliability, Bluetooth connectivity, and smart app integration, it was a favourite among refrigeration and air conditioning technicians. But as of 2025, the 557s has been officially discontinued and replaced by the Testo 558s — a newer, more powerful version designed for modern HVAC workflows.

In this post, we’ll walk you through the key differences between the Testo 557s vs Testo 558s, explain what makes the 558s a true upgrade, and help you decide whether it's time to make the switch.

Why Was the Testo 557s Discontinued?

The 557s had a great run, but as HVAC systems and refrigerant types evolve, tools need to keep up. Testo retired the 557s to make way for a more advanced, user-friendly manifold — the 558s — with a better interface, improved workflow, and even stronger wireless integration with other smart tools.

Testo 558s: The Next Generation of Digital Manifolds

The Testo 558s is now Testo’s flagship smart manifold. It builds on everything the 557s offered — and adds a sleek touchscreen interface,improved connectivity, and expanded compatibility with smart probes, vacuum gauges, and refrigerant scales.

Let’s break down the upgrades and compare both models side by side.

Key Upgrades at a Glance

• Touchscreen Display: The 558s replaces the 557s’ button-controlled display with a modern, full-colour touchscreen.
• Faster Workflows: Faster navigation, real-time graphs, and on-screen trend curves streamline your diagnostics.
• Wireless Integration: Seamless pairing with all Testo Smart Probes, vacuum gauges, and digital refrigerant scales.
• Dual Power Options: The 558s features a rechargeable battery (USB-C) and a backup AA battery compartment.
• On-Screen Graphs & Logging: Trend analysis and measurement history directly on the screen.

Side-by-Side Comparison Table

What Makes the Testo 558s Ideal for Australian HVAC Techs?

• Designed for both residential and commercial HVAC/R work
• Easily integrates into fully wireless setups
• Compatible with low-GWP refrigerants
• Backed by ongoing firmware updates
• Built for Australian conditions – rugged, accurate, and efficient

Authorised Australian Distributor: Advanced Tools

At Advanced Tools, we’re proud to be an authorised Australian distributor of Testo products. Whether you're upgrading from the 557s or buying your first smart manifold, the 558s is an investment in speed, precision, and ease of use.

🔧 Featured Product

✅ Testo 558s Digital Manifold with 4-Way Valve Block

Take control of your HVAC diagnostics with the most advanced smart manifold on the market.

Includes:

• Full-colour touchscreen
• 4-way valve block
• Bluetooth connectivity
• Rechargeable + AA backup battery
• Compatible with Testo Smart Probes and Smart App

💡 Ideal for air conditioning, refrigeration, commissioning, and system servicing.

👉 Buy now from Advanced Tools — your trusted Testo distributor in Australia

Final Thoughts

If you’ve been using the Testo 557s, it’s time to upgrade to the Testo 558s. It offers everything the 557s did — and much more — with better workflow, smarter features, and future-ready compatibility. Designed for the real demands of Australian technicians, the 558s helps you get the job done faster, more accurately, and with full confidence.

Don’t get stuck with outdated tools. Upgrade today and experience the difference.