* Low-side pressure: This indicates the refrigerant level and the system's overall capacity. Too little refrigerant results in poor cooling, while too much can cause serious damage.
* High-side pressure: This helps determine if the compressor, condenser, or other components are functioning correctly. High pressure can indicate blockages or malfunctions.
* Temperature: Some gauges also include temperature readings, which further help diagnose problems.
Adding refrigerant by weight alone ignores the system's operational pressures and temperatures, leading to potential problems like:
* Overcharging: This can cause compressor damage, potentially leading to costly repairs.
* Undercharging: This results in ineffective cooling.
* System contamination: Introducing impure refrigerant can lead to compressor failure.
Therefore, using gauges is essential for a safe and effective recharge. It's best to have the system properly diagnosed by a qualified technician if you suspect issues beyond a simple low charge.
