Wine fault

Wine fault meaning

A wine fault refers to any undesirable characteristic in wine that negatively impacts its aroma, flavor, appearance, or overall quality, typically resulting from flawed winemaking techniques, contamination, or improper storage conditions. Common wine faults include cork taint (caused by TCA contamination, affecting 2-7% of wines), oxidation (excessive exposure to oxygen leading to browning and flat flavors), reduction (sulfur compounds creating rotten egg or burnt match aromas), volatile acidity (acetic acid producing vinegar-like sharpness), and Brettanomyces contamination (wild yeast creating barnyard or medicinal off-flavors). Heat damage from storage temperatures above 70°F (21°C) can cause cooked fruit flavors and premature aging, while light strike affects wines in clear bottles, creating unpleasant sulfur compounds. Refermentation in bottle can produce unwanted carbonation and off-flavors, particularly problematic in still wines. Some faults like cork taint are immediately detectable, while others like oxidation develop gradually. Understanding wine faults helps consumers identify quality issues and assists winemakers in implementing preventive measures during production and storage. Professional tasters can detect most faults at concentrations well below average consumer thresholds, making fault recognition crucial for wine evaluation and quality control.