Reznor 197078 Flow Switch

This air flow switch is it metal on the other side too, or it is plastic? I am afraid not to melt because the garage heater Reznor FE125 create a heat. I have the part and it is FS689-1623 016017 / 5196 /B 125131 mount diaphragm vertical and it is all metal

Hi, it didn't show that pressure switch being for that unit. It shows a 196653 for units built before 1/94 and a 195316 for units built after 1/94 for 0-4000ft altitudes. Please check if this is what you are looking for:

https://www.gsistore.com/products/reznor-196653-pressure-switch