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Forced hot water radiator too hot!
I’m brand new to both home ownership and understanding all things heat so I appreciate the help.
We got a new steam boiler installed and off the boiler is a forced hot water radiator in a section of the house that was an addition.
These radiators are getting hot as heck and the room isn’t heating consistently. There is one of these https://www.supplyhouse.com/Honeywell-L4006A1678-High-or-Low-Limit-Aquastat-100-240-F-range-5-F-to-30-F-Differential
between the boilers and the pump (I think it’s the pump). I’m wondering if I need to change the water temperature in that or change the differential?
We’ve got the thermostat set at 67-68 and the room still get sweltering seemingly after it initially kicks on.
Here is a picture of the whole setup on the boiler: https://i.imgur.com/iiQNCNf_d.jpg?maxwidth=640&shape=thumb&fidelity=medium
As an aside the radiators and hot water copper are rattling and banging, I assume I just need to purge the air to fix that?