One of our followers on Facebook had a question about an electric heater discovered on a recent job. It's fair to say the heater has seen better days.

This Q & A is one of thousands posted in our Technical Expertise area, and answered by our Voltimum Experts.
Question:
Just wondering what would cause shrink back on a domestic electric fire.
Stopped working last night and on inspection found this.
It's not down to vibration, the lug did feel tight when I checked for any loose connections but that's not say it wasn't. There was some burning on the terminal. So that would suggest maybe it wasn't as tight as I thought.
What do you think?
Answer:
Hard to guess, the most likely cause would be a loose terminal. However, if there was some debris or dirt in the connection too, or something else cause a slightly reduced contact, that could be the cause.
Gary Parker, ECA Technical team