Where is the car air conditioning sight glass hole located?

1 Answers
DeAlejandro
07/30/25 6:57am
Car air conditioning sight glass hole is located in the engine compartment. Here are detailed explanations about it: 1. Explanation one: It's normal to see bubbles in the refrigerant sight glass. Every vehicle's air conditioning system will show a small amount of bubbles in the sight window because there's inevitably some gas mixed in when refrigerant is collected into bottles during production. 2. Explanation two: The standard refrigerant charge should be determined either according to the standard refrigerant filling quantity marked on the product nameplate of the air conditioning system, or by roughly estimating the appropriate refrigerant charge based on the operating state parameters of the air conditioning refrigeration system pipelines. 3. Explanation three: Generally, the high pressure of car air conditioning systems is around 150, and the low pressure is around 30 (these two values are marked on refrigerant gauges). This represents the optimal pressure state for most air conditioning systems.
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