Symptom Probable Cause Corrective Action
Water temperature too high. The electronic controller is set too high. Adjust the electronic controller to the desired
temperature.
The electronic controller shows
temperature in C° instead of F° (or F°
instead of C°).
The electronic controller was not programmed to
the correct unit of measure.
Contact Authorized Service Agent or Hatco for
assistance.
Water temperature too low. Sink heaters need 30 minutes to reach a safe
sanitizing temperature.
Turn ON the unit and wait 30 minutes for the unit to
reach proper temperature.
The electronic controller is set too low. Adjust the electronic controller to the desired
temperature.
Heating elements burn out. The sink or holding vessel is dry or has a low level
of water. (Sink or holding vessel should be filled
with water to normal operating level.)
Contact Authorized Service Agent or Hatco for
assistance.
Deposits built up in the heater pipes are restricting
water flow. (Perform the entire “Cleaning”
procedure in MAINTENANCE.)
Contact Authorized Service Agent or Hatco for
assistance.
The sink or holding vessel leaks. Fittings are too loose or too tight. Properly tighten any fittings that may be causing the
unit to leak. Replace gasket, if necessary.
The POWER ON/OFF (I/O) switch is
in the ON (I) position but the unit is
not heating the water.
The Energy Cut-Off switch was activated. The unit overheated—likely due to a low water level.
Fill the heater to the proper water level and turn the
POWER ON/OFF (I/O) switch to the OFF (O) position
and then to the ON (I) position.
Fuses may be blown, the circuit breaker may be
tripped, or the power cord may be unplugged.
Check for proper fuse sizing and replace fuses,
check/reset circuit breaker, and/or check/replace
power cord.
Drain handle not fully closed. Move the drain handle to the vertical position.
This unit must be serviced by trained and qualified
personnel only. Service by unqualified personnel may lead
to electric shock or burn.
ELECTRIC SHOCK HAZARD: Turn OFF power switch,
unplug power cord/turn off power at circuit breaker, and
allow unit to cool before performing any cleaning,
adjustments, or maintenance.
Form No. HHM-0517
12
TROUBLESHOOTING GUIDE
Error Codes
There are three error codes that may show in the display:
E1: Indicates that the display temperature is out of range or
display temperature probe is malfunctioning. Contact
Authorized Service Agent or Hatco for assistance.
E2: Indicates that the control temperature is out of range or
control temperature probe is malfunctioning. Contact
Authorized Service Agent or Hatco for assistance.
E3: Indicates that the low water probe has not been satisfied.
The heating elements are not yet submersed. Check water
supply and water shut-off valve.
Troubleshooting Questions?
If you continue to have problems resolving an issue, please contact the nearest Authorized Hatco Service Agency or Hatco for
assistance. To locate the nearest Service Agency, log onto the Hatco website at www.hatcocorp.com and click on
Find Service Agent, or contact the Hatco Parts and Service Team at:
Telephone: 800-558-0607 or 414-671-6350
e-mail: partsandservice@hatcocorp.com
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