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Old 10-09-2012, 09:25 PM   #1
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high voltage a on secondary side of trans


I heard this could happen, but have never seen it. The only way I can see this happening is the secondary winding was touching the primary. The trans was used but it said good on it, so I didnt think about ohming it out. Has any one ever seen 100V on the secondary side of a 24V trans? And yes I took secondary side out of the circuit.

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Old 10-09-2012, 09:32 PM   #2
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high voltage a on secondary side of trans


Sounds like you already have it figured out.

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Old 10-09-2012, 09:37 PM   #3
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high voltage a on secondary side of trans


so does that mean you have seen this. Did it trash your fan relay? Im not sure why I just have a hard time believing this could happen.
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Old 10-09-2012, 09:39 PM   #4
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high voltage a on secondary side of trans


Lucky it's only the relay you lost. Thermostat, circuit board etc. are all vulnerable to a line voltage surge.
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