Atwood Mobile Products - Troubleshooting


Electronic Ignition Guides are only intended for use on Atwood™ products by service technicians who have successfully completed Atwood™ training. This guide should be used in conjunction with the appropriate Instruction Manual provided with the product and any applicable Industry Standards. This is not intended to be a complete list. Please direct questions concerning service of Atwood™ products to 866-869-3118 option 5 before proceeding or service@atwoodmobile.com





WATER HEATER LOCK OUT - SPARK PRESENT BUT NO GAS
CONDITION	SOLUTION
Gas pressure incorrect Low voltage Blocked main burner tube Blocked main burner orifice Loose wires on E.C.O. Loose wire connections on solenoid valve Loose valve wire on wiring harness Defective E.C.O. Defective circuit board Defective solenoid valve No gas to solenoid valve Dirty connector on circuit board	Set inlet pressure at a minimum 11" W.C. with two or more appliances running Correct power supply - 10.5 VDC minimum Clean burner tube Clean or replace orifice Secure wire connections Secure wire connections Repair wire on edge connector or repair wiring circuit board harness Replace E.C.O. Replace circuit board Replace coils or solenoid valve Correct gas supply Clean edge connector

WATER HEATER LOCK OUT - GAS PRESENT BUT NO SPARK
CONDITION	SOLUTION
High tension lead wire loose Electrodes loosely attached to main burner Improper electrode gapping Dirty electrodes Wires loose in electrode porcelain Cracked porcelain on electrode Defective circuit board	Secure wire connection on circuit board Secure electrodes to main burner Re-position spark gap to 1/8" and into path of flame Clean electrodes Replace electrode Replace electrodes Replace circuit board

WATER HEATER LOCK OUT - GAS AND SPARK PRESENT
CONDITION	SOLUTION
Gas pressure incorrect Low voltage Poor electrical ground Electrodes out of flame pattern Electrodes sparking to screw fastening burner to flue tube Dirty electrodes Partial obstruction in main burner Partially obstructed main burner orifice Improper air adjustment Flame spreader on main out of adjustment Manifold no aligned with main burner Partially opening solenoid valve Defective circuit board	Set inlet pressure at a minimum 11: W.C. with two or more gas appliances running Correct power supply - 10.5 VDC minimum Secure electrical ground Re-adjust electrodes Adjust electrodes Clean electrodes Clean main burner Clean main burner orifice Adjust main burner air shutter approximately ¼ open or greater Adjust flame spreader so that it is square to the end burner tube out of alignment of the main burner Re-align solenoid valve with main burner Replace solenoid valve Replace circuit board

EXCESSIVE OR INSUFFICIENT WATER TEMPERATURES
CONDITION	SOLUTION
Bypass kit valves not set properly Thermostat not seated against tank Defective thermostat	Place valves in proper position Reseat thermostat Replace thermostat

ERRATIC BURNER FLAME OR SOOTING
CONDITION	SOLUTION
Low gas pressure Poor gas supply Improper air adjustment Poor main burner alignment Mis-aligned burner flame spreader Blocked burner orifice Obstructed main burner Obstructed "U" tube Obstructed exhaust grille	Set inlet pressure at a minimum 11" W.C. with two or more gas appliances running Replace gas supply Adjust main burner air shutter approximately ¼ way open - flame should be mainly blue and quiet Adjust valve and main burner alignment Align flame spreader so it is square with end of burner tube Clean orifice - DO NOT enlarge orifice Clean main burner Clean "U" tube Remove obstruction

NO SPARK AND NO GAS
CONDITION	SOLUTION
No voltage Dirty edge connector on circuit board Defective thermal cut-off Defective ON/OFF switch Defective circuit board Defective thermostat	Correct power supply - minimum 10.5 VDC Clean edge connector Replace thermal cut-off Replace switch Replace circuit board Replace thermostat



* not covered under warranty