The game was only a minute old when Matty Robson latched on to a cross from JP McGovern to give Carlisle the lead over a Coventry side looking to extend a record of six away wins in a row.
Ninety five minutes of football later it was still the only thing separating the sides.
t was a huge improvement on the Blues last outing when they were beaten 4-0 by Swindon.
Liam Noble and Lee Miller both spurned chances to extend United's lead, while two shocking misses by Coventry's Leon Clarke will have been a bitter pill for away fans to swallow.
Carlisle are now 17th in League One, nineteen points above the relegation zone.
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A look ahead at the weekend forecast for the Border region.
A number of new and ongoing road improvements are planned for Monday 24 July to Sunday 30 July across the region.
A driver whose illegal over-taking led to him crashing his car head-on into another car, has been jailed today for two-and-a-half years.