![background image](http://html1.mh-extra.com/html/l-b-white/tradesman-cp100/tradesman-cp100_owners-manual-and-instructions_3088305016.webp)
The backflash switch is an auto reset temperature switch.
The switch should be tested at least once a year, preferably
when the heater is given a thorough cleaning.
1. Remove the switch with bracket from the heater.
2. Holding the switch by its mounting bracket, apply a
soft flame only to the sensing portion on the backside
of the switch. Be careful not to melt the switch
housing when testing.
3. Within thirty seconds you should here a pop coming
from the switch, indicating that the electrical contacts
have opened. Check the switch contacts for
continuity to verify the circuit has opened.
4. Allow the switch to cool down. The switch will reset
itself in about one minute. Check for continuity
across the terminal to verify contact closure.
FIG. 12
TESTING THE BACKFLASH SWITCH
FLAME
SENSING SURFACE
BACKFLASH SWITCH
15
Summary of Contents for Tradesman CP100
Page 2: ......