Gas and Oil Home Heating Furnaces - Temp gauge vs HI/Lo settings

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11-12-01, 11:01 AM
Quick question: Is it unusual to have a 15 degree difference from what the Water Temp. thermistat shows Vs what I set my Hi temp level to? I just put in a new Aquastat in a 20 year old Boiler figuring the tempertures should be closer but the new one is giving me approx the same readings.

Weil McLain cast Iron Boiler

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11-14-01, 10:05 AM
it should state the manufactures set differential.On some there is a adjustment for the differential.PDF