Product review (5 stars): Fixed my slow-to-heat oven
Our oven was taking a half hour more or less to preheat.  After calling around and figuring out this piece was the problem (and the cheapest repairman I could find would be $120), I found it here and ordered it for about $25.  My husband was able to easily install it himself (it came w/instructions, plus there's YouTube vids about it).  Now it works like new again!  Preheats in about 5-10 minutes.  So glad it was an easy fix!