Automotive AC Repairing and Replacing – Flushing AC Components

1. Install the flush hose to the flush container. Firm finger pressure is recommended for the tightness of this hose.

The flush hose must be firmly installed prior to adding the flush solvent into the vessel. The flush hose is equipped with a rubber-tipped blow nozzle that is used to control the flush process very

2. Add the flush solvent to the flush tool. Using a funnel and wearing some type of gloves is recommended in order to prevent spilling the flush solvent or getting it on your hands. This flush vessel holds one quart of liquid.

The flush solvent is added to the container. Be careful to not spill any solvent. The container is typically filled up to the full capacity to provide enough solvent to do a good job of cleaning the

3. Install the top to the flush tool. Firm finger pressure is recommended for the tightness of the top.

After adding the flush solvent to the container, the top is installed to the unit. The O-ring should be in good shape to prevent a loss of pressure when the unit is connected to the pressure

4. After making sure that the flush hose is firmly connected, connect the flush tool to a shop air source or a pressurized nitrogen source. It is recommended to use confident and firm techniques when connecting the pressure hose to prevent having the chemical escape and be sprayed out of the vessel.

The pressure hose is connected to the pneumatic adapter on top of the flush container. Once the pressure is turned on, the vessel is ready to be used to flush the components. Care should be taken to not accidentally hit the handle on the flush nozzle, which would cause the flush to be quickly

5. Position the line over a drain pan to prevent the pressure is recommended for the tightness of the flush solvent from spilling on the floor or on the top. ground.

The flush nozzle should be inserted into the opening on the line to be flushed while the other end of the line is directed to a catch pan. The valve should be activated to force the flush solvent through the line. This process should be repeated for each component that needs to be flushed. If several different parts of the AC system need to be flushed, then the container will have to be refilled to complete the

6. Carefully blow pressurized flush liquid into the line or component that is being flushed. It is recommended that small bursts of solvent be pushed through the component instead of just giving it full throttle. Using this technique will prevent high pressure from building up in the component and solvent being sprayed out onto the person doing the flushing.
7. The used flush substance can be stored in the container that holds the used refrigerant oil.
8. The correct type of refrigerant oil should be added back into the AC components before reassembling the system. Consult service information for the amounts.

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