Lennox Equipment not specified Error Code 125

Priority condition: Service Urgent There is a hardware problem on a system component control. There is a control hardware problem. • In system using iHarmony zoning, the system will remain in non-zone mode (all dampers open) for five minutes after priority condition no longer exist. • In systems using a Equipment Interface Module, remove jumper if present on indoor unit between R and W2. • In systems using a PureAir S, the pure air control board jumper selector is missing. If none of the above tips are applicable, then replace the control if the problem prevents operation and is persistent.