Thermal Fuse blown on heatgun - suggestions on replacing?

Discussion in 'General Electronics Chat' started by RogueRose, Jun 29, 2015.

  1. RogueRose

    Thread Starter Member

    Oct 10, 2014
    This is a Chicago Electric 96289 1500w dual setting hot air gun. It just stopped working after being turned off and a minute later, it wouldn't turn on. I checked continuity and everything checks out except the white wire from the power input - which goes to some strange component I'be never seen before which I've found to be a thermal fuse.

    What are the "rules" for replacing this and is there anything to be aware of before ordering?

  2. shortbus

    AAC Fanatic!

    Sep 30, 2009
    Just like anything else electronic, use the same value of the original. Radioshack, if you have one near you or an appliance parts store should have them. They are used in coffee pots and other such appliances.

    The more worrying thing would be the condition of the red wire. What does it connect to? Looks like it may be why the thermal fuse blew.
    RogueRose and #12 like this.
  3. ian field

    Distinguished Member

    Oct 27, 2012
    Looks like the red wire goes to the element - its gonna get hot.

    That melted insulation kooks a bit dodgy, but its not the end of the world being next to that mica - I'd probably have a crack at tying it down with some plumbers PTFE tape.

    A better repair depends on what connector that wire has on the other end, its possible to salvage wire from a scrap heater that has woven glass strand insulation - if you can get a length with the right connector on one end, that's half the battle.
    RogueRose likes this.
  4. Reloadron

    Active Member

    Jan 15, 2015
    I don't know if you will easily find another Aupo Manufacture but NTE makes and distributes them. My guess is you have a 133 degree C version rated at around 15 Amps maybe. The link is to a NTE data sheet so should help. Allied Electronics as well as a host of other distributors carry the NTE line. As a side note most heat guns have a fan only switch position. Following any prolonged use it is best to use the fan only (no heat to element(s) to allow the element to cool. Once the fan stops you can get a thermal rise off the element which can melt a thermal fuse.

  5. Lestraveled

    Well-Known Member

    May 19, 2014