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TROUBLESHOOTING GUIDE
Form No. EBOOSTERBWM-1009
16
Symptom Probable Cause Corrective Action
Water at dish machine is not at the
proper temperature.
Gauge(s) not working properly. Check temperature of water with a thermometer
to be certain gauges are working correctly. If not,
replace gauge(s).
Thermostat set too low.
Adjust or recalibrate. If thermostat will not
recalibrate properly, replace it.
Lime buildup in tank causing
elements to split and burn out.
Clean or delime tanks periodically. A water
softener or blended phosphate treatment system
may be required.
Contactor may be sticking in closed
position not allowing unit to cycle off.
Contact Authorized Service Agent or Bradford
White for assistance.
Thermostat set too high. Adjust or recalibrate to proper temperature.
Incoming water temperature too high
causing nuisance tripping of high
temperature limit switch.
Incoming water temperature should not be higher
than 160°F (71°C).
Temperature limit set too low. If booster water heater is not overheating,
Contact Authorized Service Agent or Bradford
White for assistance.
Unit is overheating. Thermostat may be set too high or is sticking.
Recalibrate or replace the thermostat.
Bypass in pressure reducing valve
may be blocked.
Clean bypass or replace with new valve
with built in bypass.
Check valve or anti-siphon valve
installed in the feed line.
Remove check valve or anti-siphon valve to allow
for water expansion or install a back pressure
relief valve on the incoming water line.
Heating elements burn out.
Relief valve dribbles.
Relief valve opens.
High temperature limit trips.
Low voltage. Contact Authorized Service Agent or Bradford
White for assistance.
Probe may be fouled. Contact Authorized Service Agent or Bradford
White for assistance.
Contactor(s) may be bad. Contact Authorized Service Agent or Bradford
White for assistance.
Loose connections or wire
connection has insulation under
crimp.
Contact Authorized Service Agent or Bradford
White for assistance.
Chattering contactor or low water
cutoff circuit board.
Booster heater has more than 5
linear feet (1524 mm) of water pipe
to the dishwasher, causing the water
to cool off inside the pipe.
If located farther than 5 linear feet (1524 mm),
pipes should be wrapped in insulation, and/or a
recirculating system installed.
Tank inadvertently drained leaving
elements in a dry condition.
Make sure tank is full of water at all times.
Contact Authorized Service Agent or Bradford
White for assistance.
No pressure reducing valve installed
or incorrect valve installed causing
pressure build-up inside booster
tank.
A pressure reducing valve with high pressure
bypass must be installed in the incoming water
line to allow water to expand back into the feed
line.