As Rusty just described, powervents are not complicated at all. They are either on or off using a simple motor. They all have a proving switch which tells the control that the power exhaust is working and lets the burner fire. A heavy wind could be a possible problem but not likely unless the prevailing winds that day were directly at your discharge fitting outside the house. Even then they should work against high winds. It sounds more likely that the burner had a faulty start up for some reason and it needed a reset. Multiple resets are not recommended because each time more fuel will be pumped into the combustion chamber and when it does fire a small explosion could occur. I would definitely call the people that serviced your burner and let them know what happened since it sounds like this condition did not exist before it was serviced.
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SIKSUKR
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