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Troubleshooting a "chirping" OPV on an Ascaso Home Espresso Machine

Troubleshooting notes for a "chirping" OPV assembly on an Ascaso Home espresso machine for brew pressure adjustment.

*if machine product date is 2022 or older, consult with us at Info@AscasoUSA.com about getting a new replacement OPV without check valve. If machine is 2023 or newer, turn pressure up higher to 13-14 bar for a few rounds of backflushing (no cleaning powder), then adjust OPV back down. 

Common Cause: Brew pressure needs to be adjusted higher than it's set to on OPV assembly