1. Getting Started - Prepare for the repair
2. Open the Hood - How to pop the hood and prop it open
3. Locate Port - How to access the low pressure port
4. Air Conditioning Fill - Safely add refrigerant to your A/C system
5. Replace Cap - Replace the low pressure port cap
6. More Info. - Additional thoughts on recharging your A/C system
When the air conditioner in your 2003 Lexus GX470 starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling the R134a refrigerant. The A/C system in your GX470 consists of a compressor that is belt-driven, an evaporator and freon. If there is a problem with your compressor or evaporator, adding freon will not restore cooling. How to add freon to your 2003 Lexus GX470: hook up the can of refrigerant (likely r-134a) to the low pressure port. When your compressor kicks on, add freon to the correct pressure. In addition to cooling, freon lubricates the compressor when it runs.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.
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