I have a Weil-McLain Oil Burner and had the yearly maintainence done on it 4-6 weeks ago. The guy said the boiler looks great and real clean. I was down their pretty much the whole time he was here. That night I noticed the heat would not come on. It would run for hot water but not for heat. I called them (9pm on friday night). They came out and replace the control. A Honeywell L8124 aquastat. Since then, when we run the bath or shower, we have to keep on adjusting the water hotter, to keep the heat up. And after a while it turns luke warm. I turned the mixing value up, only a little,but that was no help. It's acting like the coil is going, but we replaced that a couple of years ago. My aquastat is set at High=205, low=180 and differential on about 16. Any suggestions
Thanks
Barry
Thanks
Barry