Fault Codes/KOHLER CO./BLINK4KOHLER CO.BLINK4UnclassifiedGeneralWhat This Code MeansFAULT LED BLINK4Possible Causes•CT wiring faultRelated KOHLER CO. Fault CodesBLINK12B3B1BBrowse all KOHLER CO. fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for BLINK4 on your specific KOHLER CO. unit — cited to the OEM manual, not a forum guess.Your question about BLINK4GET THE ANSWERFree account required — we'll bring your question with you.