The striker made his first appearance of the season after overcoming a long-standing heel injury, setting up the Hammers' second goal in a much-needed victory over Cardiff City
Carroll made his first appearance for West Ham since May, and his first since making a big-money permanent move from Liverpool in June.
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"I'm buzzing to be back," Carroll told reporters. "It's a great feeling to be back after being out for so long. This was my first game back so obviously I was a bit rusty.
"But I was happy to set up the goal at the end and I'll try to forget about the rusty bits."
West Ham assistant manager Neil McDonald believes Carroll's return will give the club a big boost, and has tipped the 25-year-old to play a key role in their bid to avoid relegation.
"[Carroll's return] is going to make the squad stronger, for competition for places," he said.
"When he (Carroll) came on I thought the crowd got behind him; they've seen the players who want to wear the shirt and have given everything.
"I think Andy typified that when he came on, holding the ball up, flicking it on and making the pass for Mark Noble to score the second goal.
"He gets stronger as time goes on to progress with training and games, and I'm sure he will make a big difference for us."