American Water Heater 40 Gallon 38000 BTU Direct Vent Natural Gas Water Heater DVG6240S38NOV user manual

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Natural gas and Propane (LP) 
main burner with igniter assembly 
for 38k to 42k Btu/hr models
31
36
38
39
30
33
34
35
32
37
40
Flare 
Nut 
††
†
Figure 47 
37
Natural gas and Propane 
(LP) main burner with igniter 
assembly for 47k Btu/hr 
models
353634
33
32
31
4039
3830
Flare 
Nut 
†††
Figure 48 
Notes:
† The orifi ce on Natural gas models has Right-hand 
thread, the orifi ce on Propane (LP) models has Left-
hand thread.
††  For Natural gas models the Flare Nut...

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TROUBLESHOOTING GUIDELINES
PROBLEM POSSIBLE CAUSE(S) CORRECTION
BURNER WILL NOT 
IGNITE1.  Pilot not lit
2.  Thermostat set too low
3. No gas
4.  Dirt in the gas lines
5.  Pilot line clogged
6.  Main burner line clogged
7. Defective thermopile
8.  Defective gas control/thermostat1. Light pilot
2.  Turn temp. dial to desired temperature
3.  Check with gas utility company
4.  Notify utility-install trap in gas line
5.  Clean, locate source and correct
6.  Clean,...

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PROBLEM POSSIBLE CAUSE(S) CORRECTION
INSUFFICIENT HOT 
WATER1.  Thermostat set too low
2.  Sediment or lime in tank
3.  Water heater too small
4.  Wrong piping connections
5. Leaking faucets
6.  Wasted hot water
7.  Long runs of exposed piping
8.  Hot water piping in outside wall
9.  Low gas pressure
10. Leaks or cracks in dip tube
11. Incorrect  plumbing/plumbing  crossover1.  Turn temperature dial to desired setting
2.  Drain/flush-provide water treatment if...

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STATUS LIGHT AND DIAGNOSTIC CODE 
TROUBLESHOOTING CHART
LED STATUS PROBLEM CORRECTIVE ACTION
0 FLASHES (LED NOT LIT) Pilot light is not lit or 
thermopile has not yet reached 
normal operating temperature.Turn Gas Control Valve/Thermostat knob to 
“OFF”. Wait 10 minutes, then attempt to relight 
Pilot by following the lighting instructions on the 
water heater’s label. Until the thermopile reaches 
its normal operating temperature, the Status Light 
will not...

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LED STATUS PROBLEM CORRECTIVE ACTION
4 FLASHES The Gas Control Valve’s 
temperature sensor has 
detected that the water 
temperature was too high. 
Once this condition occurs, 
the Main Burner and the Pilot 
Light will be shut off. Since the 
Pilot light will be off, should 
this condition occur, this Flash 
Code will only be displayed 
immediately after the Pilot has 
been relit. Turn Gas Control 
Valve/Thermostat knob to 
“OFF”.Relight pilot and verify 4...

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NOTES 

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NOTES
  

   
 
 
 
 
 
 
500 Princeton Road, Johnson City, TN 37605
Phone: 800-999-9515  •  Fax: 800-999-5210
www.americanwaterheater.com