Vacuum cleaner plug scorch marks
 

My 1 year, 3 month old Dyson vacuum cleaner works fine but has some burn or scorch marks on the prongs of the plug. Replace or repair? My house is 30 years old and I am in the process of replacing all of the outlets.

You are using a worn out socket so that the plug is easy to pull out and there is excessive contact resistance between the plug and socket and so you getting excessive localized heating, which further increases the contact resistance by removing the temper of the spring contacts in the socket.

Or not! :laughing:

If its black with carbon, a little emery cloth will do. If its pitted, replace the cord after you fix the receptacles! No sense burning up the new plug too.

After cleaning the prongs, try plugging into a different receptacle and after just a few minutes of vacuuming, feel the plug. If the plug is hot then a bad connection has developed inside the plug and you need to cut it off and replace it.