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Need help with American Standard GPH Natural gas Boiler
I’m stumped, I’m looking at a 50 year old American Standard Natural gas Boiler model GPH-100. The boiler is operating between 180*F and 220*F. And due to the overheating the pressure is approaching 30PSI causing the relief valve to drip.
I cannot find a high & Low limit control anywhere, I’m puzzled.
Does anyone know what controls the high and low limit on this boiler?
I will send pictures
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