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From: bob haller on 21 Jan 2010 17:35
On Jan 21, 2:16�pm, John Fields <jfie...(a)austininstruments.com> wrote:
> On Wed, 20 Jan 2010 20:54:01 -0800 (PST), bob haller <hall...(a)aol.com>
> wrote:
>
> >Thermal fuse was blown, it was on the outside of �the input winding.
> >Hopefully that will fix the machine. Epoxy will put it back together
> >again.
>
> >How sad to toss a transformer for the lack of a fuse:(
>
> ---
> Did you replace the fuse?
>
> JF

yeah had a fuse:) plus i will add a regular fuse too.

the transformer looked brand new, no signs of overheating.

since many machines i repair use thermal fuses I have some
observations:)

They do fail as designed when overheated.

When in high current uses they appear to fatigue fail.

Not from overheating but too many thermal cycles.

One manufacturer has this problem, So I put 3 10 amp thermal fuses
together in a parrell bundle.

I believe this will end the blown thermal fuse for no reason.

Its irritating and expensive to drive 100 miles just to replace a aged
thermal fuse.

since most of my machines are under maintence these trips arent
billable and just cost me time and money
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