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Old 01-24-2012, 06:32 AM   #16
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Furnace shutting down after 30 seconds


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Originally Posted by Liberator View Post
Is it safe to do this?

Or should you just try another thermostat?

Thanks
If its something other than stat it will still shut off,shouldnt be an issue.
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Old 01-24-2012, 06:35 AM   #17
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Furnace shutting down after 30 seconds


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that works some of the time but not for cracks, still need to get a Pro with mirrors and a scope.
If its anything like the old 80% trane heat exchangers i can usually guess how many are cracked before i even pull the burners out!
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Old 01-24-2012, 06:42 AM   #18
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Furnace shutting down after 30 seconds


I put a stick thermometer in front of the burners at a strategic location. fire it up and watch the temp go to 300F after 5 mins if it is cracked. plus I know where all those crack anyway.
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