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Oil fired boiler keeps cycling on and off after Nest calls for hot water baseboard heat
I’m having a problem with the hot water heating side of my oil fired steam boiler. When the Nest for hot water baseboard calls for heat, it starts then shuts off after a minute, temp gauge reaches ~100, then cycles on and off until thermostat is satisfied but temp gauge never reaches high limit aquastat set point of 180. BUT when the thermostat that controls the steam side is satisfied, and THEN the thermostat for hot water baseboard calls for heat, the circulator runs, burner is off and the temp gauge increases to 140 before burner turns on for a minute, turns off and then starts to cycle until thermostat is satisfied. Why would this be happening? Could someone please help me or guide me in some direction?
I have a WM SGO 3 oil fired boiler, tankless coil, L4006a1967 low and high limit aquastat, low set to ~100 (getting dhw from electric heat pump water heater), high set to 180, Ra89a relay- please see posted pics
Thank you for any and all the help that you can provide