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Thread: American standard freedom 80
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03-07-2012, 08:41 AM #1
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American standard freedom 80
I have a 190 -30 limit switch to replace .. Does this switch activate the blower when the temp reaches 160 and when it exceeds 190degrees ??
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03-07-2012, 08:58 AM #2
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Not sure of that unit but unless its a dinosaur the limit switch doesnt activate the blower. Its a safety.
It will open at 190 and close at 160
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03-07-2012, 09:02 AM #3
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It is a safety and at 190 will open the 24 volts to gas valve and auto reset when it reaches 160
Originally Posted by jmiles
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03-07-2012, 10:24 PM #4
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If it starts with L (L190-30) it's just a limit if it starts with F (F190-30) then it controls the fan... i think thats pretty much it Originally Posted by jmiles
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03-08-2012, 12:19 AM #5
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Yup thats just a safety. Like said above opens at 190 and closes at 160. For the fan, that is timed ON and OFF by the board.
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03-08-2012, 09:27 AM #6
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I can't picture that furnace but on many units, probably most all today, if that limit opens it will also power on the blower and often the inducer as well.
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