Bunn FMD-5 User Manual

8

Water is not hot (Cont.)

Spitting or excessive steaming 

Dripping from dispense tip

Water flows into tank continuously

4. Tank Heater Switch

5. Heater Relay

6. Control Board

1. Lime build-up

CAUTION - Tank and tank compo-

nents should be delimed regularly 

depending on local water conditions. 

Excessive mineral build-up on stain-

less steel surfaces can initiate cor-

rosive reactions resulting in serious 

leaks.

2. Control Thermostat 

1. Lime build-up

CAUTION - Tank and tank compo-

nents should be delimed regularly 

depending on local water conditions. 

Excessive mineral build-up on stain-

less steel surfaces can initiate cor-

rosive reactions resulting in serious 

leaks.

2. Dispense Solenoid Valve 

1. Control Board

2. Solenoid Valve (Inlet)

Refer to Service - Tank Heater Switch 

for testing procedures. See page 

52

Refer to Service - Heater Relay for 

testing procedures. See page 51

Refer to Service - Control Board for 

testing procedures. See page 20

Inspect the tank assembly for ex-

cessive lime deposits. Delime as 

required.

Refer to Service - Control Thermo-

stat  for testing procedures. See 

page 26

Inspect the tank assembly for ex-

cessive lime deposits. Delime as 

required.

Remove the dispense solenoid valve 

and clear any obstructions. Rebuild 

or replace the valve if necessary. See 

page 47

Refer to Service - Control Board and 

Probe for testing procedures. See 

page 20

Refer to Service - Solenoid Valve 

(Inlet) for testing procedures. See 

page 49

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