nealtw
Contractor retired
I had the same problem. My bathroom outlet and 2 outside outlets quit working and were registering approx. 89 volts. the rest of the load araes such as lights were working just fine.
I traced the problem to the GFI outlet in the other bathroom. all I did was reset it and then everything came back to good working order. I suspect maybe someone in my household may have triggered the fault and when they pushed the reset button it didn't get pushed all the way to where it clicked. figured I post this result in case someone else has the same issue and can save some time by checking and testing all the GFI's that may be on the circuit in question
If you are right you should be able to do it again and prove it.