Was brand new in the box when i got it. The E4 error came on after 3 uses and never went away.
Response from babybrezza.comBy Baby Brezza Team, April 24, 2024
We apologize for the inconvenience you've experienced with your Formula Pro Mini. It's certainly frustrating when a new product encounters issues so soon after purchase. The E4 error typically indicates a problem with the water temperature sensor. Please contact our Customer Care team. We're committed to ensuring that you have a positive experience with our products, and we'll do our best to resolve this issue for you.