How to exhaust the van when replacing antifreeze?

1. Find the deflation screw from the end of the antifreeze tank and loosen it with a screwdriver;

2. Connect the vent pipe to the other side, adjust the vent screw, and slowly loosen the adjustment screw to allow the remaining antifreeze to be discharged by itself;

3. Check the exhaust situation until there is no antifreeze flowing out;

4. Pull out the breather pipe, reinstall the breather screw and tighten the screw;

5. Add new antifreeze, remove the deflation screw again, and observe whether the new antifreeze flows out. If not, the antifreeze filling is finished.