High-pressure A/C hoses transport pressurized refrigerant. The line from the compressor carries hot gas at up to 350 PSI. The line from the condenser carries liquid refrigerant. These hoses are made of thick barrier rubber reinforced with steel braiding to handle the extreme pressure.
Mechanic Glossary
A/C Hose High Pressure
The refrigerant line that runs from the compressor to the condenser, and from the condenser to the expansion valve.
Frequently Asked Questions
The thinner metal line in the engine bay. It will have a smaller service port valve labeled with an 'H'.
The rubber bakes from engine heat, and road vibrations stress the metal crimps until they weep oil and gas.
No. System pressures are too high. The tape will blow off instantly. You must replace the hose.