I agree with the above reply, a conductivity meter will let you know which
contact you should use the n/c or the n/o
"cj" wrote in message
...
greeting, i have determined the the limit switch in my furnace is bad and
i have found the following replacement part on line

http://bestbuyheatingandaircondition...tegory_Code=FL

my question is that the new switch has 3 connections whilst my old switch
has only 2 connections..how will i know which connections to use?

thanks, cj