Raindem

Update for anyone who encounters a similar problem...

Finally got the electrician out there. The neutral wire at the main panel had come loose and the connection degraded. It only affected the 110V outlets, not the lights or 220V circuit. He had to go get some kind of new part, I wasn't here the day he fixed it, but it's working again.

Looks like joe cool nailed it.

Wuzzat?

Which means that other stuff in your house was exposed to voltages way higher than 220/2. If you have a rash of failures in the next few months you'll know why.

ohmy

Voltage Drop? I would check the outlets and breaker. Do you have another plug that you can test the machine with?

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SGC622

the neutral conductor is an excellent route to check but unless the contractor either didnt check the main panels neutral connection to the sub or overall didnt know what he was looking for i think it could be a faulty breaker feeding the sub panel. because i just replaced an old sylvania panel with a faulty main breaker and it was dropping one phase randomly we drilled out the rivets on the main breaker and took it apart and the contacts were severely damaged. some ways of checking are if your familiar with phasing in the panel and can track down every circuit thats causing you the problem and see if they are all on the same phase that could be an indicator, also check for humming or a buzzing coming from the breaker in the main panel that feeds the sub panel. Goodluck!