Girard Products GSWH-1 Service Manual page 28

4. Water Heater Lockout – Gas present but no Spark
a. High Tension Lead Wire Loose: Secure Wire Connection on Circuit Board
b. Poor Ground Connection at Burner: Secure Ground Connection to Main Burner
c. Improper Electrode Gapping: Re-position Spark Gap Between Electrode Tip and Burner
Blade to 1/8˝ and into Path of Flame
d. Dirty Electrode: Clean Electrode
e. Wires Loose in Electrode Porcelain: Replace Electrode
f. Cracked Porcelain on Electrode: Replace Electrode
g. Defective circuit board. CONFIRM with Approved Board Tester such as Fenwal part # 05-
080224-009) - Replace
5. Water Heater Lockout – Gas and Spark Present
a. Check Gas Pressure: Set inlet pressure at a Minimum 11˝ W.C. with Two or More Gas
Appliances Running.
b. No or Low Voltage: Correct power supply - 10.5 VDC Minimum
c. Poor Electrical Ground: Secure Electrical Ground
d. Dirty Electrode: Clean Electrode
e. Partial Obstruction in Main Burner: Check for Complete Ignition of Burner Blades through
Sight Hole. Remove any Obstructions.
f. Partially Obstructed Burner Manifold: Clean Burner Orifices; Replace if Necessary
g. Dirty Connector on Circuit Board: Clean Edge Connector
h. Defective circuit board. CONFIRM with Approved Board Tester such as Fenwal part # 05-
080224-009) - Replace
6. Erratic or Uneven Burner Flame
a. Check Gas Pressure: Set inlet pressure at a Minimum 11˝ W.C. with Two or More Gas
Appliances Running
b. Partial Obstruction in Main Burner: Check for Complete Ignition of Burner Blades through
Sight Hole. Remove any Obstructions
c. Obstructed Exhaust Tube Grill. Inspect and Remove any Obstruction
d. Partially Obstructed Burner Manifold: Clean Burner Orifices; Replace if Necessary
7. Excessive or Insufficient Water Temperatures; Water Not Hot or Water Cold
a. Air is present in water lines: Purge Air from Water Lines
b. Thermostat not Seated Against Sensing Tab: Reseat Thermostat and Add Thermal
Paste to Insure Good Contact
c. Defective Thermostat: Replace Thermostat
d. In Case of Excessive Temperature, Verify that the Maximum Flow is not Limited by a Flow
Restrictor
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