Might be Night of the Running Man. The third review down mentions the boiling water scene:
Amazon.com: Night of the Running Man [VHS]: Andrew McCarthy, Alex Zonn, Matthew Laurance, Carl Ciarfalio, Antony Ponzini, Jeanna Michaels, Scott Glenn, Kathrin Lautner, Peter Iacangelo, Mayf Nutter, Don Stark, Damon Carr, Kim Lankford, Frank Novak (I
E.