Obsolete Thermal Limit Switch


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Old 12-22-05, 06:04 PM
T
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Obsolete Thermal Limit Switch

The Thermal Limit Switch in my garage gas unit heater is obsolete. It is a Therm-o-disc 11T-13 with the numbers 140 and 24027 stamped on the mounting flange. It apparently turns the fan on at 140 degrees. Can anyone tell me at what temperature it is supposed to cut off? The heater is a Webster WG75A. Thanks. Al.
 
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Old 12-22-05, 07:33 PM
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Question A little confused

Al, Is this a fan switch to turn on the fan or a limit switch to turn off the burner if the heater gets too hot?
A fan switch is normally open & closes when it reaches a certain temp.
A limit switch is normally closed & opens when it reaches temp.
 
 

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