Team Northumbria clinched an eighth win on the bounce and booked a return trip to Cumbria after winning a tense FA Vase first qualifying round tie.
Colin Stromsoy's men have not lost since the first weekend of August and went into their clash at Carlisle City as hot favourites to progress.
But the hosts made life difficult for their Northern League rivals before a Ben Dibb-Fuller brace secured a 2-1 win.
TN will return to Cumbria later this month to take on Penrith in the second qualifying round. The Northern League Division One side defeated Durham City 5-3 yesterday.