P planeman125 New Member Feb 25, 2019 24 Rhode Island Jun 26, 2019 #1 I have a Napoleon low limit thermal switch and I am looking to replace it. Can anyone tell me the temperature range for W690-0002? It fits a GZ552 fan kit or GZ550 fan. I think it's a 125/20 but I am not positive. Thanks in advance for the help!