Many believe that values are crucially dependent on emotions. This paper focuses on epistemic aspects of the putative link between emotions and value by asking two related questions. First, how exactly are emotions supposed to latch onto or track values? And second, how well suited are emotions to detecting or learning about values? To answer the first question, the paper develops the heuristics-model of emotions. This approach models emotions as sui generis heuristics of value. The empirical plausibility of the heuristics-model is demonstrated using evidence from experimental psychology, evolutionary anthropology and neuroscience. The model is used then to answer the second question. If emotions are indeed heuristics of value, then it foll...