ChillerFaultCodes.com is a free online reference tool designed for commercial HVAC service technicians, facility managers, and building engineers. Our mission is to provide quick, accurate, and accessible fault code lookup for all major commercial chiller brands.
We currently catalog fault codes for 8 major chiller manufacturers including Carrier, Trane, York, Daikin, McQuay, Lennox, ClimaCool, and Multistack. Our database covers 28 model series with 860+ alarm codes, each with detailed descriptions, probable causes, observable symptoms, required tools, estimated repair times, and step-by-step troubleshooting procedures.
All fault code data is compiled from publicly available OEM service manuals, technical bulletins, and industry-standard HVAC references. We cross-reference each code with original manufacturer documentation to ensure accuracy. However, always verify with the official OEM service manual before performing any repairs.
All tools and lookup features on this site are completely free to use. No registration, subscription, or login is required. We are supported by sponsored advertisements from HVAC service software and parts suppliers.