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That would be the first thing to check. If you get back to me with a model number I can grab a manual for you and it will show you how to test for this. It would take a small digital multimeter like you can find at most hardware stores for about $20 or so for this testing. I can direct you in that. All follow ups are included in our fee.
Just checking back in to see if you got this resolved or do you still need some additional input from me here?