The F228796 High Limit Switch KSD301 115C/240F limits heater output to a maximum 240 Degrees Fahrenheit, and is used for many of the forced air propane portable heaters made by Enerco under the brands:

Mr. Heater
MH35FA, MH170FAVT, MH400FAVT

Heatstar
HS125FAV

The F228796 High Limit Switch fits the following portable forced air propane, torpedo heaters, salamander heaters:

Mr. Heater
MH35FA
PA35FA

Heatstar
HS35FA