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.
More top news
Our experts take a look at the key issues that would face Scotland and the rest of the UK if Scots vote for independence.
A look ahead at the forecast for the Border region.
Thousands of people cross the border to visit their doctor. Patients on both sides are worried about the possible effects of a “yes” vote.