There was an earlier thread about a Pellet Stove tripping a GFI. I and other had responded that could mean various things. Just as an update, although not exactly related, my mac mini was tripping my GFI after 2-24 hours. I knew it was the mac, because nothing else made the circuit trip. I called them and asked for a new brick power supply, telling them (they didn't really know chit) that this must be a power supply problem. Sure enough, the new brick came the next day, and it does not trip the GFI any longer..... As to the Pellet stove doing the same, it could be the power cord or even possibly the power supply in the stove itself. But, it also could be a bad GFI outlet and the connections in the panel, etc. The first order of business, besides plugging it into a non-GFI outlet, might be to switch out the Pellet Stove power cord....if it has an easily replaceable one. If it continues to trip after that, you might have your circuit and GFI outlet checked and the outlet replaced. If it still trips, that does point to a leakage of sorts somewhere in the Pellet Stove electronics.