Troubleshooting Guide

To isolate a malfunction, proceed as follows:

Clearly define the problem (or symptom) and when it occurs.
Locate the problem in the Troubleshooting table.
Review all possible causes. Then, one-at-a-time, work through the list of corrections until the problem is solved.

Problem	Cause	Solution
Reading does not match actual temperature	Thermometer bulb is not in holding block	Insert bulb in block
Reading does not match actual temperature	Faulty thermometer	Replace the thermometer
Product not holding temperature	Doors are not kept closed	Keep doors closed when possible
	Product held too long	Only hold product for recommended times
	Water temperature too low	Check water heating system per Water Pan Heater
	Radiant heat too low	Turn to higher setting
	Radiant heat not working	Check radiant heat system per Radiant Heater
	Light bulbs out	Replace as required, per Replacing Light Bulbs and Glass Panels
Doors are fogging	Doors left open too much allowing doors to cool and cause condensation	Keep doors closed when possible
	Radiant heat not high enough	Turn to higher setting
	Water temperature too high	See recommended settings and temperatures
	Radiant heat not working	Check radiant heater per Radiant Heater
Water will not fill	Water supply has been shut- off	Check the water supply or disconnected
	Faulty float switch	Check float switch per not fill Float Switch
	Faulty water control switch	Check water control switch per Water Control Switch
	Faulty water valve	Check water valve per Water Valve
Lights will not turn on	Defective fuse	Replace 15 amp fuse
	Faulty light switch	Check light switch per Light Switch
	No neutral supplied in field wiring	Check field wiring to be sure a true neutral has been connected
	Loose or defective wiring	Check wiring and repair and replace if necessary
Not all lights on	Faulty light bulbs	Replace as required, per Replacing Light Bulbs and Glass Panels
Not all lights on	Faulty light switch	Check light switch per Light Switch
Water will not heat	Faulty contactor	Replace contactor per Contactor
	Faulty thermostat	Check thermostat per Thermostat
	Faulty high limit switch	Check high limit switch per High Limit Switch
Water will not reach desired temperature	Bun pans are not over water	Place perforated bun pans over water
	Low or improper voltage	Use a meter and check wall voltage versus data plate
	Faulty water heating element	Check heating elements per Water Heater
	Wiring	Check for loose connections or faulty wires and correct or replace as necessary
Radiant heat not working	Faulty infinite regulator	Replace infinite regulator per Infinite Switch
	Faulty power switch	Check power switch per Power Switch
	Faulty radiant heater	Check heater per Radiant Heater

Reference

Specifications

HCW and HCS Wiring Diagrams