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Replaced old Honeywell L8124L(thats what was there originally) triple aquastat because circ pump didnt run. Ran system, no problems... until next day my sister calls and says now its overheating. She just moved into the house, no history on the blr. Its an old weilMclain oil boiler, no hw coils, just straight heat. What should my hi/lo settings be or should I be using another aquastat / any suggestions(L8148?) and no, the kid behind the parts counter was no help, where did all the good old countermen go?