larry moe 'n curly wrote:

When I come across a burnt resistor, I usually replace it with one
rated for twice the wattage as the original, but I was told it's
sometimes bad to do that. Why? I'm not referring to fuse resistors
but ordinary carbon composition resistors.

Sometimes, ordinary resistors ARE used as fusable.
Anything to save a cent, or a fraction of a cent anyway.
--
Abandon all hope ye who have entered cyberspace.