Richard Ford scored deep in stoppage time to make it 3 league wins out of 3 for Boston Town.
The Poachers skipper headed home a Jordan Tate cross to seal the win at the end of a gripping contest that saw both sides hit the woodwork.
But the visitors had to play for more than half an hour with 10 men after John King was sent off for kicking out at Travis Portas.
Portas had missed Boston Town’s 2 FA Cup games but was back in goal to make some important saves and claim his 2nd clean sheet of the season.
Heanor also lost Mason Booth-Davis to injury but looked to have hung on for a point until that dramatic winner in the 98th minute.
Ford was named man of the match by sponsors Glen and Tom Carter.
Martyn Bunce’s side have now won 8 league games in a row stretching back to March.
They climb to 2nd in the United Counties League Premier North table behind Eastwood on goal difference.
On Wednesday (14 August), they travel to Newark Town in the league.
Town: Portas, Tate, Millar, Worthington, Ford, Burdass, Maddison, Adams, Nuttell, Limb (Beeson), Bayliss (H Bunce); unused subs: Field, Sellars
Boston Town FC 