Owner's Manual
Page 21
...; This button will remain blank unless the furnace filter change right of difficulty RTH8500 If you have difficulty with your Installation Guide). Display is blank • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is battery powered, make sure fresh AAA alkaline batteries are correctly...
...; This button will remain blank unless the furnace filter change right of difficulty RTH8500 If you have difficulty with your Installation Guide). Display is blank • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is battery powered, make sure fresh AAA alkaline batteries are correctly...