This Avantco 19386267 temperature probe is a direct replacement for the one that came with your Avantco merchandiser. It is a vital part of your unit's refrigeration system, working to help your unit maintain the right temperature. A broken or malfunctioning high temperature probe can prevent your unit from maintaining specifications and cause strain on other components, so be sure to fix it promptly. It's compatible with Avantco HAC and CAC series merchandisers.