I have in-floor heat in a room above a garage. The boiler is a Takagi TK-4, a Taco SR503 switch relay and a Taco 0011- F4 circulating pump. I have the boiler set at 120 deg at the high limit, but my problem is that it won't re-fire untill water temperature drops to 85 deg. The floor never gets very warm, even on mild days. I can't find any way to make an adjustment. The system is one year old, last year I didn't have any issues with it. Any suggestions?