The 196950 is a replacement flame rollout switch with manual reset. Its yellow dot indicates the temperature high and low limits of 225°F / -31°F for this flame rollout switch.
It is manufactured by Nortek for Reznor. It is for use with models:
- UDAP100, UDAP125
- UDAS100, UDAS125
- UDX100, UDX125
- UDZ100, UDZ125