Resideo (Honeywell Home) L8148E 1257 Aquastat relay is Obsolete
Resideo (Honeywell Home) L8148E 1257 high limit Aquastat relay with 15 degree F fixed differential immersion-type controllers, combines high limit protection with switching relay control of the burner and circulating pumps replaced by Resideo (Honeywell Home) L8148E 1265 Aquastat relay
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This is an official Resideo (Honeywell Home) replacement part
Honeywell L8148E 1257 high limit Aquastat relay with 15 degree F fixed differential immersion-type controllers, combines high limit protection with switching relay control of the burner and circulating pumps