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Burnham Revolution NG Boiler Overheating

CoachRickCoachRick Posts: 3Member
Good evening! I have a 17 year old Burnham Revolution Gas Boiler model RV6NSL-L2. The primary loop on the boiler gets up to 220 degrees (this boiler has an internal primary loop with a multi speed cartridge pump in it). I replaced main the Aqua stat (Honeywell L8148E - well goes directly into one of the cast iron boiler sections) last year, and the boiler temp is still to hot. I do have a remote Aquastat controller on the supply main (Honeywell L6006A 1145). I have not replaced this one yet.
I can use some ideas on why the boiler is not shutting off until the temp gets to 220 degrees.

Thank you for your help with this!

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