The A/C compressor manifold hose connects the compressor to the rest of the A/C system. It contains two rubber hoses joined at a single metal block that bolts to the compressor ports. One hose is the suction line, which carries cold, low-pressure gas from the evaporator. The other is the discharge line, which carries hot, high-pressure gas to the condenser. The manifold block uses rubber sealing gaskets to prevent refrigerant leaks.
Mechanic Glossary
A/C Compressor Manifold Hose
A dual-hose assembly that bolts to the A/C compressor, combining the low-pressure suction line and high-pressure discharge line.
Frequently Asked Questions
The rubber hoses degrade from engine heat and road vibration. Leaks often develop where the rubber hose is crimped to the metal fittings.
Yes. Always install new rubber O-rings or metal-backed sealing washers on the manifold block to prevent leaks.
On many vehicles, they are joined at the manifold block and must be replaced as a single dual-hose assembly.