Heath were beaten 28-10 at home by east coast visitors Scarborough, who finished by far the stronger after trailing 10-7 early in the second half.
The visiting forwards got on top and Heath, after some solid performances on home soil in recent weeks, lost their way.
The visitors began at full speed and put the home defence under a lot of pressure, missing an easy penalty after 10 minutes.
From the re-start, Ezra Hinchliffe set up Heath’s first real attack when he found touch and then linked with fullback Jacob Storey. Si Brown and Rob Thackray continued the move but Scarborough covered and a chance was lost.
Back came the visitors and they again pressed for the opening score. Heath survived from a quickly taken penalty but it was only a matter of time and, after Will Sellars was sin binned, Scarborough took a 7-0 after 24 minutes.
Heath were struggling to come to terms with the Scarborough onslaught but tacked hard.
On 32 minutes, a Scarborough prop was sin binned for an off the ball incident, well spotted by an excellent referee, but Heath were left needing a pick-me-up after a very disappointing first half.
On came Matt Cook and Alex Cust as coach Kevin Plant made changes and gave a pep talk.
This had an immediate effect with captain Mark Puttick leading by example and Darren Neilly, Will Sellars and Alex McFadden working hard to win ball.
Hinchliffe pulled back three points with a penalty and from the restart, fast open play from Heath’s back row led to Rob Thackray going over for a converted try after 45 minutes.
Scarborough re-grouped and responded with a converted try on 50 minutes to retake the lead.
As their strong pack began to take control, they started to dominate the game.
Storey was sin binned for obstruction and Heath were at sixes and sevens.
That enabled Scarborough to add two converted tries in the last quarter to clinch a bonus point and run out easy winners.
It was a performance to forget for Heath, who have work to do before entertaining Selby in their last game before the Christmas break next Saturday.