Bunn FMD-4 User Guide

Page of 46
39
SERVICE (cont.)
FIG. 38 TANK HEATER SWITCH TERMINALS
P1219
BLK to Main
Harnesss
BLK from Main
Harness
FIG. 37 TANK HEATER SWITCH
TANk HEATER SWITCH
P2635
Location:
 
The tank heater switch located inside the dispenser 
on the upper right of the front panel.
Test Procedure:
1.  Disconnect  the  dispenser  from  the  power 
source.
2.  Disconnect the black wires  from the main wiring 
harness.
3.  With the switch in the “ON” lower position check 
for continuity between the center and the upper 
terminal. With the switch in the “OFF” upper po-
sition no continuity should be  present between 
center and upper terminals.
If continuity is present as described, the tank heater 
“ON/OFF” switch is operating properly.
If continuity is not present as described, replace the 
switch.
Removal and Replacement:
1.  Remove the switch mounting nut on the front of 
the front panel.
2.   Remove switch with wires attached from the rear 
of the front panel.
3.  Remove the wires from the switch terminals and 
discard switch.
4.   Connect the wires to the new switch, refer to Fig. 
38.
5.  Push new switch through hole in the front panel 
and secure with facenut.
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