Low limit thermodisk question

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New Member
Feb 25, 2019
Rhode Island
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!
If 30 is the differential then that sounds right.
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