Aman Verma's penalty helped Kettering beat Lincoln and move out of the Blue Square Bet Premier relegation zone.
The Poppies could have taken an early lead but Danny Mills missed a good opportunity when he side-footed wide following Patrick Noubissie's cross.
But the hosts went ahead when Verma converted from the spot after Richard Pacquette had handled in the area.
Pacquette had the best chance to grab an equaliser for the Imps but his left-footed lob from 18 yards dropped wide.
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Kettering Town caretaker manager Ashley Westwood tells BBC Radio Northampton:
"The most pleasing thing was the clean sheet. You don't get them without tremendous team spirit and we've shown that there.
"The back four never looked troubled, to be honest. They looked solid. In the midfield, they've done their jobs like we wanted and the three lads up front have worked hard.
"We thoroughly deserved the win and hopefully we can look forward.
"On the last two games, on the field, it looks like we've got no problems."
Lincoln City manager David Holdsworth told BBC Lincolnshire:
"I'm disappointed and shocked. I can't believe we're going home with nothing after the chances we've created.
"I felt it was a soft penalty against us and I felt we should have had one for a foul on Richard Pacquette.
"We needed a bit more quality, the will was there but the end product was clearly missing. Kettering defended stoutly but we must rue those missed chances.
"The attitude was right and the set-up was right, you can't take any team lightly and we certainly didn't, but if you keep missing chances it can cost you and it did."