Fan oven motor

[Tim+]

Turned my oven on tonight and the fan just hummed and didn’t spin. Turned
it off and spun it with a stick poked through the slots and it ran fine
after that.

I’m guessing it’s on its way out but was wondering if there is any future
in trying to lubricate the bearings or whether to cut my losses any just
order a new fan before it fails totally.

If it *is* worth trying to lubricate the bearings, what sort of oil should
I use?

Tim

--
Please don't feed the trolls

[The Natural Philosopher]

Oven fan? probly phosphor bronze bushings. I'd say 3 in 1 except its
gonna be up to 200C.

Silicone spray?

https://www.amazon.co.uk/JENOLITE-Silicone-Spray-Lubricant-Mulit-Purpose/dp/B0897VM3BF


--
WOKE is an acronym... Without Originality, Knowledge or Education.

[Fredxx]

On 26/05/2021 19:54, Tim+ wrote:
>

The one I came across is where the fan motor was a modest distance from
the fan, where the shaft went through the rear of the oven and so was
much cooler than the oven temperature.

In which case anything to hand should be good. You might find that it's
crud that is seizing the motor and a liberal spray with oil will assist
greatly if only to displace the crud.

[Steve Walker]

From experience, lubrication doesn't seem to work for long. You may
well be able to change the bearings though.

[Unknown]

The Natural Philosopher laid this down on his screen :

> Oven fan? probly phosphor bronze bushings. I'd say 3 in 1 except its gonna be
> up to 200C.

Are you sure they run that hot? Our gas oven fan draws cool(er) air in
from the back/rear of the ovens, through the oven and out via the front
door. Idea is, it prevents heat build up around the built in oven
casing.

[Tim+]

Electric ovens just circulate the contained air. As my wife bakes sourdough
bread regularly it’s often cranked up to 220C which I suspect is taking its
toll.

[The Natural Philosopher]

Well you are probably right. I had a brain fade and was thinking they
were extractor fans - they arent really are they - more circulation fans.

However my comments on bronze bearings stand. The quick fix is a squirt
of oil, the better fix is a complete soak on first of all solvent to
remove the old hard lubricant, and then soak in oil afterwards - the
bronze actually absorbs it.

Needless to say th e latter is mostly impractical and once you have the
fan out you might as well shove in a new one



--
“when things get difficult you just have to lie”

― Jean Claud Jüncker

[The Natural Philosopher]

well mine - I had serviced the Aga yesterday so had to use the electric
oven to roast my dinner - blows warm air and roast-chickeny smells out
the front, so it's not *just* circulating

But you make a point, it's certainly not operating at ambient temps

Somewhere in between.

My experience with model plane motors with bronze bearings also suggests
they tend to go bad when the motor has been pushed too hard and got too hot.



> Tim
>


--
Outside of a dog, a book is a man's best friend. Inside of a dog it's
too dark to read.

Groucho Marx

[Steve Walker]

On 27/05/2021 07:57, Tim+ wrote:

But the motor itself is usually outside the oven cavity and its
insulation and often has a second fan on the shaft, to keep the motor
much cooler.

[Clive Page]

On 26/05/2021 19:54, Tim+ wrote:
>

I've had the same problem, more than once. I use a few drops of three-in-one or whatever is handy. Any oil you use will evaporate over time as the unit gets exposed to quite a bit of heat, so maybe some high-temperature oils would be better, I don't know. Every couple of years the fan in our oven makes noises and starts to jam, so I know it's time to get the back off the oven and oil the bearings again.


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Clive Page