A reference network for diagnostic fault codes across HVAC systems, water heaters, boilers, and home appliances. Find the code, understand the cause, fix the problem.
Fault codes for Carrier, Lennox, Trane, Goodman, Rheem, Daikin, Mitsubishi, and 20+ more brands.
hvac.codes →Rinnai, Navien, Noritz, Takagi, and Bosch tankless and tank water heater diagnostic codes.
hvac.codes/rinnai →Mini-split and central heat pump error codes from Fujitsu, LG, Gree, Midea, and more.
hvac.codes →