Overflow Protection Switch - Bunn FMD-3 Operating & Service Manual

SERVICE (cont.)

OVERFLOW PROTECTION SWITCH

FIG. 25 OVERFLOW PROTECTION SWITCH
Location:
The overflow protection switch is located inside
the copper overflow cup on the left side of the tank.
Test Procedures:
1. Disconnect the dispenser from the power
source.
2. Remove the wire nuts connecting the red wires
from the overflow protection switch to the black
wire and blue wire from the main harness.
3. Check for continuity across the safety overflow
switch red wires only until the plastic float is raised
and check that continuity returns when the plastic
float is again lowered.
If continuity is present as described, reconnect the
red wires to the black wire and the blue wire from
the main harness.
If continuity is not present as described, replace the
overflow protection switch.
Removal and Replacement:
1. Disconnect the red leads from the overflow protec-
tion switch from the black wire and the blue wire
from the main harness.
2. Remove the nut beneath the copper overflow
cup.
3. Remove the entire switch assembly from the
cup.
4. Place the new switch assembly into the cup, wires
first. Make sure that a gasket is in place around
the threaded switch stem.
NOTE - The magnets must be at the top of float and
there must be NO adjusting washers installed for the
overflow protection switch to operate properly.
5. Install the nut beneath the copper overflow cup.
Be sure not to overtighten.
6. Refer to Fig. 26 when reconnecting wires.
P1637
RED to BLK Wire
from Main Harness
FIG. 26 OVERFLOW PROTECTION
32
RED to BLU Lead
from Main Harness
SWITCH LEADS
P1212
29170 080900