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Diagnosing automotive A/C compressors: the equipment a service centre needs today

25 February 2026 · MSG Equipment

Diagnosing automotive A/C compressors: the equipment a service centre needs today

Preparation for the A/C season should start early. MSG Equipment presents the MS111 and MS112 benches for mechanical and electric compressor diagnostics.

MSG Equipment argues that car air conditioning is no longer a mere comfort option but a system that directly affects safety and well-being. Since spring and early summer bring peak demand, workshops are advised to prepare equipment and staff before the season starts.

The article highlights two benches that together cover almost all compressor diagnostic tasks:

  • MS111 – for belt-driven mechanical compressors in combustion-engine cars; works with R134a and R1234yf and 12/24 V, offers automatic and manual modes, separate testing of the clutch and control valve, post-repair run-in and printed reports.
  • MS112 – for electric compressors with built-in inverters and 200–400 V supply used in hybrid and electric vehicles.
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