Fault Codes/Shindaiwa/WRNSERVICE T3+4ShindaiwaWRNSERVICE T3+4UnclassifiedGeneralWhat This Code MeansAlarm message 'WrnServiceT1+2' or 'WrnService T3+4' is displayed; Maintenance interval timer alarm activatesPossible Causes•Maintenance interval timer counter reached zero•Periodical maintenance is requiredSuggested Actions1Perform periodical maintenance2Set the timer value again to remove the alarm messageRelated Shindaiwa Fault CodesWRN SERVICET3+4WRN SERVICET1+2SPILL CONTAINMENT OVERFLOW WARNINGSPILL CONTAINMENT CHECKINGWRNSERVICET1+2WRNSERVICET3+4WATER TEMPSPILL CONTAINMENT CHECKING INDICATORBrowse all Shindaiwa fault codes→ASK RUDY ABOUT THIS FAULTGet a diagnosis walkthrough for WRNSERVICE T3+4 on your specific Shindaiwa unit — cited to the OEM manual, not a forum guess.TRY IT FREE