"L8148E" is not a complete Honeywell model number. Following that number would be what is referred to as a backup number. In this case the "1265". In my experience the backup number sometimes has significance. In that it signifies something unique and sustentative about he product. Sometimes it simply indicates that the control was made by Honeywell for a specific boiler manufacture a an OEM control.
L8148E is only half of a Honeywell number. You are missing the back up number. The "E" will be followed by four more digits; such as 1265 or 1257. Sometimes these numbers are important and sometimes they indicate that it is an OEM control that can only be purchased through the boiler manufacturer. If you have further questions you can give me a call. Chris 978 651 3301
No, the L8148A is different from the L8148E being sold. The A has a high limit only.
Yes ..this controller can be mounted either direction....
Yes. As long as your Aquastat control is 24v. Look in the cover of your old one or on the cover of the control. It should say 24v somewhere.
No. The burner circuit voltage on this is 24 volts. This is for a gas burner. You need a 120 volt burner circuit. Honeywell makes many aquastats. The cover shows L8148E. There are 4 numbers after L8148E that determines the type. There should be a small label attached to top or bottom of the aquastat showing the full number.