This was a real seesaw battle and highly entertaining affair at North End Park, and in the end a draw was just about right.
There was no doubt that Stevie Campbell's side dominated the first half, but it was the visitors who took the lead after 26 minutes.
Mark Archdeacon fund the net with a looping header following a cross from the right.
Before and after that, Johnny Russell had free headers from which he failed to find the net.
On the stroke of half-time, Motherwell keeper Owen Jones was at full stretch to tip over another Russell effort.
Only two fine saves by Kieran Cannon, deputising in goal for the injured John Gibson, prevented Motherwell putting the game beyond United.
Four minutes after the re-start, he blocked a drive from the impressive Jamie Murphy with his feet and five minutes later parried a Ross Forbes effort and though Forbes followed up, Sean Fleming cleared off the line.
Having survived those narrow escapes in sixty-three minutes, United levelled when Fraser Milligan's free kick was head-flicked on by Gordon Pope and Phil McGrath arrived at the back post to fire home at the back post from ten yards.
With United now having the upper hand, David Goodwillie looked to have won the game with fourteen minutes left.
Jones parried his shot from just outside the box, but it went through his hands to roll over the line.
And four minutes later Russell had a chance to wrap it all up cutting in along the by-line before firing in an angled drive that Jones just managed to palm past the far post.
However, Motherwell's fighting finish saw them not only equalise, but also come with an inch of winning.
Patrick McPake curled in a twenty yarder to secure a point with four minutes left and two minutes later only a magnificent flying finger-tip save be Cannon kept out a Forbes shot from the edge of the box.
Deep into injury time, Forbes was red-carded after his body check on Goodwillie earned him a second yellow.
Team: Cannon, Milligan, Fleming, McGrath, Pope, Ryan McCord, Brophy, Ross McCord, Goodwillie, J Russell, Love (Dow 54). Suns not used: Anderson, Mathieson, Allan, Travers, McCallum, Colgan.