Which practice helps ensure refrigeration systems function properly?

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Regular maintenance and repair of refrigeration systems is essential because it keeps the entire cooling setup operating as designed, preventing temperature excursions that can compromise food safety. Ongoing checks address all components that influence performance—compressor function, condensers and evaporators, refrigerant charge, door seals, insulation, thermostats, electrical controls, and alarm and backup power systems—so the system stays at the required temperatures and the cold chain remains intact. Regular maintenance also enables early detection of leaks, worn seals, or degraded parts, reducing the risk of sudden outages and ensuring alarms work when temperatures drift.

Calibrating temperature probes matters for getting accurate readings, but without maintenance to the system itself, a faulty probe won’t fix underlying issues. The other options focus on equipment like metal detectors or X-ray machines or on cleaning surfaces, which do not address keeping refrigeration functioning properly.