Home › Forums › Stay Dirty Lounge › Service and Repair Questions Answered Here › 2007 Honda Civic LX radiator fan does not come on when engin › 2007 Honda Civic LX radiator fan does not come on when engine is up to temp. November 14, 2011 at 11:00 am #439513 Trcustoms719Participant Leave the thing idle for maybe 30-45 min and see if it kicks on, If the temp gauge goes up to 3/4 and comes down once the fans kick on it’s fine.