The young Blues were in FA Youth Cup action on Monday evening as they went head-to-head with Prescot Cables for the right to host Hartlepool United in round two.
And four goals after the break settled the nerves as United took their chances and put the tie out of sight despite an excellent attacking attitude shown throughout from the visitors.
Carlisle started brightly and Sam Adewusi was first to try his luck when he let one fly from the edge of the box. It was on target but easy for Dorgan to save.
Good work from Miller then put McCarron clear on the left flank and his cross took a deflection before skipping away to safety.
Adewusi was heavily involved through the early stages and he was on the end of a decent corner delivery when he was left in space inside the area. He got his head to it but he couldn't keep it on target.
And it was Adewusi who opened the scoring moments later when a defensive mix-up left him with the goal at his mercy. He took his time and slotted it home to give his side the lead.
The visitors weren't about to roll over though and a shot from Fairclough earned them a corner as they tried to get forward in numbers.
United regrouped and started to dominate the midfield areas and a lovely through ball from Papa left McCarron with options inside the box. He went for a shot but it was too close to Dorgan and the stopper readjusted to scoop it up.
Dorgan was at his best moments later when he spread himself to make a fantastic save as Kelly and Miller worked hard to get behind the back line.
A rare lapse in concentration handed Corness an excellent opening when he suddenly found himself completely unmarked and with the ball coming at him at pace. He tried to twist his body to help to direct his volley on target but he shook his head in frustration as it ballooned over the bar.
Carlisle woke themselves up again and McCarron poked a first-time effort wide of the upright when he stretched to meet a fizzed delivery from the right wing.
It was all about the hosts ahead of the break but Brockbank and Papa wasted good chances to double the lead as they put miscued efforts over the target.
A more clinical approach was required and the half time team talk did the trick as United came out of the blocks raring to go.
And striker Belchior Papa got the goal his tireless work had deserved when he picked his spot following some good football just three minutes after the restart.
Jaic Miller settled any lingering nerves when he pounced on a horrible mix-up to squeeze the ball home from a very tight angle.
The Cumbrians upped the pace yet further and Olsen was a whisker away when he nodded just wide from a dipping corner.
McCarron, Adewusi and Watson all had shots which Dorgan dealt with comfortably, but he could do nothing as substitute Max Cowburn burst through to round off another very eye-pleasing passage of play.
And it was Cowburn who turned provider when he bent a beauty of a cross into the mix. Luke Lloyd kept his eye on it and he got his reward with a stabbed finish from very close range.
The icing on the cake would have been a clean sheet for the home side, but Prescot had other ideas, and they got their goal when a high delivery was misjudged by the United defence. Joseph Nash kept his eye on it and he was able to guide his header into the waiting net.
There were chances at both ends as things became frantic through the closing stages but it was Cables keeper Ethan Dorgan who received a huge round of applause, ahead of the full time whistle, when he came out on top of a last ditch one-on-one situation as he made a stunning save to deny the Blues their sixth goal of the evening.
Carlisle United - Adewusi (10), Papa (48), Miller (50), Cowburn (73), Lloyd (77)
Prescot Cables - Nash (82)
Prescot Cables - Murphy (53)
Carlisle United - Ashton, Kelly, Brockbank (Dixon 73), Goldthorpe, Olsen, Hutchinson, Miller, Watson, Papa (Cowburn 67), Adewusi, McCarron (Lloyd 70). Subs - Ward, Casson.
Prescot Cables - Dorgan, Riley, Scoullar (Nash 81), Kewn, Murphy, Hughes (Jones 63), Copeland, Scorah (Coufodoulos 56), Fairclough, Corness, Van-Aston. Subs - Sailsbury, Howel.
Referee - Mr Stephen Dial
Attendance - 150