Bunn H5M User Guide

11

Location:

The safety overflow switch is located inside the rear of 

the dispenser inside the copper overflow cup.

Test Procedure:

1.  Once voltage is verified at the power source, 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 each 

of the red wires to the black wires, the safety overflow 

switch is operating properly.

If continuity is not present as described, replace the 

safety overflow switch.

FIG. 3 SAFETY OVERFLOW SWITCH

FIG. 4 SAFETY OVERFLOW WIRING

RED to BLK Wire from 

Terminal Block

RED to BLK Wire from 

Liquid Level Board #2

P1793

P1777

Removal and Replacement:

1.  Disconnect the black wires from the safety overflow 

switch.

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 the float and 

there must be NO stainless steel washers installed for 

the safety overflow switch to operate properly.

5.  Install the nut beneath the copper overflow cup.  

Be sure not to overtighten.

6.  Reconnect the wires, FIG. 4.

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