I don't know (Which) Warr you have,Fac 2nd year? or Some other? Even if Fac 2nd year is it within the Time period? If current YES they will/should fix it! If they cant get the (Pex Crimp Tools) into the Cramped area,Yes they will remove (Something) so they can! I would (GUESS)that it might be a (Cracked Fitting) before a PEX crimp issue! Maybe a (Frozen Issue) since it is Spring and Has NOT leaked before! Just Guessing!
If a Freeze issue that will (Maybe) be on you,unless the (Dealer) did the Winterize!