What must be done when checking refrigerant pressure?

When checking refrigerant pressure, ensuring that gauges are calibrated is essential for accurate readings. Calibration ensures that the pressure readings you obtain reflect the true pressure within the system. If gauges are not calibrated correctly, any measurement taken could lead to misunderstandings about the system's performance, potentially resulting in improper diagnosis, unnecessary repairs, or misinformed adjustments.

Accuracy in pressure readings plays a critical role in HVAC troubleshooting and maintenance. It helps technicians determine whether the system is charged correctly, diagnose issues like leaks or blockages, and ensure the system is operating efficiently. Therefore, calibration is a foundational step before conducting any checks on refrigerant pressure, ensuring reliability and precision in your findings.