Thermal Fuse in Fan

[TonyS]

Hi, I have a ceiling fan that stopped fanning.
Turns out to be a thermal fuse that's blown, probably due to running the fan all
day. The fan works fine otherwise.
The fuse is a white rectangular radial type marked 115deg M20 07F.
I have on stock a number of axial ones marked 156deg 10A.
The closest Altronics stocks is 133deg axial 10A.

My question is:
Would it cause a fire risk to use the 157deg ones, or even the 133deg?
Or has the fan manufacturer just been over cautious by choosing such a low
value? Or could it have other reasons, it certainly boosts their turnover. After
all it failed in an otherwise healthy fan.

Tony

 

[Phil Allison]

"TonyS"

Hi, I have a ceiling fan that stopped fanning.
Turns out to be a thermal fuse that's blown, probably due to running the
fan all day. The fan works fine otherwise.
The fuse is a white rectangular radial type marked 115deg M20 07F.
I have on stock a number of axial ones marked 156deg 10A.
The closest Altronics stocks is 133deg axial 10A.

** WES Components sell the right one:

Cat no: TF115

Costs less than $2.

My question is:
Would it cause a fire risk to use the 157deg ones, or even the 133deg?

** Yes. Very much so.

Or has the fan manufacturer just been over cautious by choosing such a low
value?

** No - the wire insulation is probably rated at 125 C max.

Or could it have other reasons, it certainly boosts their turnover. After
all it failed in an otherwise healthy fan.

** Any fan motor running at 115 C is NOT healthy.



..... Phil

 

[TonyS]

Phil Allison wrote:

"TonyS"
Hi, I have a ceiling fan that stopped fanning.
Turns out to be a thermal fuse that's blown, probably due to running the
fan all day. The fan works fine otherwise.
The fuse is a white rectangular radial type marked 115deg M20 07F.
I have on stock a number of axial ones marked 156deg 10A.
The closest Altronics stocks is 133deg axial 10A.

** WES Components sell the right one:

Cat no: TF115

Costs less than $2.


My question is:
Would it cause a fire risk to use the 157deg ones, or even the 133deg?

** Yes. Very much so.


Or has the fan manufacturer just been over cautious by choosing such a low
value?

** No - the wire insulation is probably rated at 125 C max.


Or could it have other reasons, it certainly boosts their turnover. After
all it failed in an otherwise healthy fan.

** Any fan motor running at 115 C is NOT healthy.

Thanks Phil, will order the right one then.
I guess there is another point I should mention: The mounting was in a way that
the airflow was a fair bit reduced.
I thought that may have contributed to the overheating and opened it up with a
roof vent.

Cheers

Tony

.... Phil

 

[Nik Rim]

"TonyS" <scarborofun@gmail.nspm.com> wrote in message
news:NsKdncVAs4MCcG3XnZ2dnUVZ_q1i4p2d@westnet.com.au...

Phil Allison wrote:
"TonyS"
Hi, I have a ceiling fan that stopped fanning.
Turns out to be a thermal fuse that's blown, probably due to running the
fan all day. The fan works fine otherwise.
The fuse is a white rectangular radial type marked 115deg M20 07F.
I have on stock a number of axial ones marked 156deg 10A.
The closest Altronics stocks is 133deg axial 10A.

** WES Components sell the right one:

Cat no: TF115

Costs less than $2.


My question is:
Would it cause a fire risk to use the 157deg ones, or even the 133deg?

** Yes. Very much so.


Or has the fan manufacturer just been over cautious by choosing such a
low value?

** No - the wire insulation is probably rated at 125 C max.


Or could it have other reasons, it certainly boosts their turnover.
After all it failed in an otherwise healthy fan.

** Any fan motor running at 115 C is NOT healthy.



Thanks Phil, will order the right one then.
I guess there is another point I should mention: The mounting was in a way
that the airflow was a fair bit reduced.
I thought that may have contributed to the overheating and opened it up
with a roof vent.

Cheers

Tony


.... Phil

What might seem a silly comment - I don't know what construction the fuse is
(lugs incorporated?) It should probably be installed using crimp
connections. Years ago I heard of someone who installed a couple of thermal
fuses by soldering before realiszing what they were doing...............

 

[TonyS]

Nik Rim wrote:

"TonyS" <scarborofun@gmail.nspm.com> wrote in message
news:NsKdncVAs4MCcG3XnZ2dnUVZ_q1i4p2d@westnet.com.au...

What might seem a silly comment - I don't know what construction the fuse is
(lugs incorporated?) It should probably be installed using crimp
connections. Years ago I heard of someone who installed a couple of thermal
fuses by soldering before realiszing what they were doing...............

It was actually soldered.
The wires are 50mm long.
When soldering them hurry up and use pliers as a heat sink

Tony

 

[Bob Larter]

Phil Allison wrote:

"TonyS"
[...]
Or could it have other reasons, it certainly boosts their turnover. After
all it failed in an otherwise healthy fan.

** Any fan motor running at 115 C is NOT healthy.

Too true. If your fan motor is running at over 60c, you need to find out
why, & fix it.


--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------

 

[Bob Larter]

Nik Rim wrote:

What might seem a silly comment - I don't know what construction the fuse is
(lugs incorporated?) It should probably be installed using crimp
connections. Years ago I heard of someone who installed a couple of thermal
fuses by soldering before realiszing what they were doing...............

LOL. Good point.

--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------