Miller 212979 Circuit Card Assembly, User Interface. Replaces Old Stock # 238937. Package of 1. Please confirm that you are ordering the correct part. We recommend you call Miller Tech at (800) 558-3517. Have your serial number ready. No Returns. If you are not a Certified Miller Technician and you find a problem or defect, it is your responsibility to take the item to a Certified Miller Technician for diagnoses. Again, there are no returns on this product.