Sandin had three assists, and Logan Thompson made 24 saves for the Capitals (24-17-6), who have won two of three.
“I think it was pretty obvious we were a little flat in the first 40 (minutes),” Thompson said. “We just kind of came in here and it was pretty quiet. I think everyone just said, ‘Enough is enough.’ We know we’re better than that and I think the third period really showed the type of team we can be.”
Josh Anderson and Brendan Gallagher scored, and Montembeault made 39 saves for the Canadiens (26-14-7), who are 4-1-1 in their past six games and were playing the second game of a back-to-back after a 6-3 win against the Vancouver Canucks on Monday.
“I thought we played a good half of the game,” Anderson said. “They created momentum in the second half of the game and kind of took it to us there, and, obviously, ‘Monty’ played a really good game for us tonight.”
Frank pulled the Capitals to within 2-1 at 5:06 of the third period when he tipped Matt Roy’s shot from the right circle past Montembeault with the tip of his skate.
“We’re battling through some things, missing some key guys, but we showed a ton of character to fight in that third period,” Capitals coach Spencer Carbery said. “You could tell right from the first two shifts. … You never know how it’s going to end up, but I knew we were going to put our foot on the gas and throw the kitchen sink at them.”
With Thompson pulled for the extra skater, Frank then tied the score 2-2 with 1:54 remaining in the third period. He deflected Sandin’s pass by Montembeault from the slot for his fourth goal in three games.
“With some high-end guys (Tom Wilson, Pierre-Luc Dubois) out right now, it’s huge when guys like that can step up,” McMichael said of Frank. “Over the last month, I’d say, he’s really [come into] his own, and he’s really stepped up and he’s making huge plays at key moments.”