View Single Post
  #8   Report Post  
Posted to sci.electronics.repair
Look165 Look165 is offline
external usenet poster
 
Posts: 157
Default Do Thermal Fuses Die of old Age?

My opinion is electrical peak ( = overvoltage ) !


Jeff Wisnia a écrit :
Over the years I've had to replace maybe a half dozen thermal fuses
which appear to have failed without ever being heated beyond their rated
temperatures.

Most recently a small electric space heater used in our office under my
desk stopped working because its thermal fuse had opened. The fuse was a
MICROTEMP G4A0 121 degree C unit, and I'm pretty sure that nothing had
blocked air passage through the heater and caused its internal
temperature to rise enough to open the thermal fuss.

Jeff