Daniel Prince wrote:

My electric bathroom heater has stopped working. It is a NuTone
model 920 heater. It was made in 1957. It fits into a metal can in
the ceiling which is just under 13 inches in diameter. It is rated
as 1,000 watts at 115 volts.

My brother looked and he cannot find any electric heaters that size.
It has a fan in addition to the electric element. It also has a
thermal fuse which is open. The thermal fuse says on it:

BOSS
WX|

The last character on the second line looks like a vertical line but
it might be the numeral "1" (one).

I connected it to power for a several seconds. The fan runs at full
speed and the heating element heats up.

I have looked at thermal fuses on eBay. I did not see one that
looks like the one I have. The ones I found had several different
temperature ratings.

Does anyone know what temperature rating I would need? Thank you in
advance for all replies.
--
Whenever I hear or think of the song "Great green gobs of greasy
grimey gopher guts" I imagine my cat saying; "That sounds REALLY,
REALLY good. I'll have some of that!"


These guys know - they list the 920 heater parts:

http://rienterprisepartsplus.com/nut...ER%20PARTS.htm