Dometic GC10A-4E - User Manual

HEATING
WATER HEATERS
Form No. 94840 01/20 | ©2020 Dometic Corporation
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
G6A-8E, GH6-8E, G10-3E, GH10-3E, WH-6GA, GC6AA-10E, GCH6A-10E, GC10A-4E,
GCH10A-4E, WH-6GEA, OD-5001, G6A-7, G10A-2, G9-EXT, G16-EXT,
GE9-EXT, GEH9-EXT, WH-9EXT, GE16-EXT, GEH16-EXT
EN
Water Heater
Service Manual ........................2

WARNING: BURN HAZARD, FIRE,
EXPLOSION, AND/OR CARBON MONOXIDE
HAZARD.
Keep the Water Heater area clear of combustible
cleaning materials, gasoline, and other flammable
vapors and liquids. Failure to obey this warning
could result in death or serious injury.
WARNING: If the information in this manual is not followed
exactly, a fire or explosion may result, causing property
damage, personal injury, or death.
– Do not store or use gasoline or other flammable vapors and
liquids in the vicinity of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your recreational vehicle.
• Clear the recreational vehicle of all occupants.
• Turn off the gas supply tank valve(s) or main gas supply.
• Immediately call your gas supplier for instructions. If you
cannot reach your gas supplier, call the fire department.
– Have the gas system checked and leakage source corrected by
a qualified installer, service agency, manufacturer or dealer, or
the gas supplier.

Dometic GC10A-4E Specifications

General

Brand	Dometic
Model	GC10A-4E
Category	Water Heater
Language	English

Summary

Explanation of Symbols and Safety Instructions

Recognize Safety Information

Explains the safety alert symbol and its importance for hazard recognition.

Understand Signal Words

Defines signal words (DANGER, WARNING, CAUTION) used to indicate hazard severity.

General Safety Messages

Troubleshooting

General Information

Sequence of Operations

Wiring Diagrams

Diagnostic Procedures

Component-Based Diagnostics

Provides systematic checks for individual components to identify operational problems.

Error-Based Diagnostics

Details how to diagnose system errors using the wall switch fault light and error table.

Installation Issues

Service Procedures

Performing a Gas Leak Test

Details the procedure for safely checking the gas system for leaks.

Performing a Thermostat or E.C.O. Continuity Test

Replacing a Thermostat or E.C.O.

Step-by-step guide for replacing the thermostat or E.C.O. unit.

Performing a Thermal Cut-Off Continuity Test

Replacing a Thermal Cut-Off

Provides instructions for replacing the thermal cut-off component.

Performing an Ohms Test on the Gas Solenoid Valve Coils

Replacing the Gas Solenoid Valve

Step-by-step guide for replacing the gas solenoid valve.

Performing an Ohms Test on the Heating Element

Replacing the Heating Element

Provides instructions for replacing the heating element.

Replacing a Control Board

Step-by-step guide for replacing the water heater control board.

Replacing the Relay

Replacing the Electrode

Step-by-step guide for replacing the ignition electrode.

Replacing the P;T Valve

Provides instructions for replacing the Pressure/Temperature (P/T) relief valve.

Performing a Wall Switch Continuity Test

Replacing the Mixing Valve

Step-by-step guide for replacing the mixing valve.

Performing a Pressure Switch Continuity Test

Replacing the Pressure Switch

Provides instructions for replacing the pressure switch.

Performing a Cold-Weather Thermostat Continuity Test

Replacing the Cold-Weather Thermostat

Provides instructions for replacing the cold-weather thermostat.

Replacing the Modulating Valve

Performing a Reed Switch Continuity Test

Performing a Thermocouple Circuit Test

Testing the Thermocouple

Replacing the Thermocouple

Maintenance

Checking the DSI Control Board

Inspecting the Burner and Burner Assembly

Resetting a Locked-Out Control