American Water Heater 318935-003 Benutzerhandbuch

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4.  Manifold component block properly installed.
5.  No leaks at pilot and manifold connection.
6.  Burner door screws securely tightened. 

1.  Burner door gasket properly sealed.
2.  Viewport not damaged or cracked.
3.  Flame-trap free of debris and undamaged.

BURNER WILL NOT IGNITE

1.  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. Non-functioning 

thermopile

8. Non-functioning 

thermostat

9.  Heater installed in a confined area

1. 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, locate source and correct

7. Replace 

thermopile

8. Replace 

thermostat

9.  Provide fresh air ventilation

SMELLY WATER

1.  Sulfides in the water

1.  Replace the anode with a special anode

BURNER FLAME YELLOW-

LAZY

1.  Insufficient secondary air

2.  Low gas pressure

3. Flue 

clogged

4.  Main burner line clogged

5.  Heater installed in a confined area

6.  Obstruction in main burner orifice

1.  Provide ventilation to water heater

2.  Check with gas utility company

3.  Clean, locate source and correct

4.  Clean, locate source and correct

5.  Proper fresh air ventilation

6.  Clean or replace orifice

PILOT WILL NOT LIGHT OR 

REMAIN LIT

1. Non-functioning 

igniter

2.  Thermopile connection loose

3.  Air in gas line

4.  Proper Lighting Sequence not followed.  

Gas Control / Temperature Knob was not 

held in for sufficient time.

5.  Low gas pressure

6. No 

gas

7.  Dirt in gas lines

8. Cold 

drafts

1.  Replace igniter pilot assembly

2.  Seat connector firmly in socket

3.  Bleed the air from the gas line

4.  Do not attempt to relight if the red light is lit 

and the pilot flame is not visible through the 

view port.  Wait until the red light is no longer 

lit, then follow lighting instructions on the water 

heater.

5.  Check with gas utility company

6.  Check with gas utility company

7.  Notify utility-install dirt trap in gas line

8.  Locate source and correct

Removing the Gas Control Valve/Thermostat:
1.  

Turn the gas control/temperature knob  to the “OFF” 

position (Figure 19A).

2.  Turn off the gas at the manual shut-off valve on the gas 

supply pipe (Figure 3).

3.  

Drain the water heater. Refer to the section on “Draining 

and Flushing” and follow the procedure.

4.  

Disconnect the igniter wire from the igniter lead wire. 

Disconnect the temperature sensor wire, then use 

needle nose pliers to disconnect the red (+) and white 

(-)  thermopile wires.  Disconnect  the pilot tube (7/16” 

wrench) and manifold tube (3/4” wrench) at the gas 

control valve/thermostat  (Figure 22). Refer to “Gas 

Piping” (Figure 3) and disconnect the ground joint union 

in the gas piping. Disconnect the remaining pipe from 

the gas control valve/thermostat.

5.  To remove the gas control valve/thermostat, thread a 4”  

section of gas pipe into the inlet and use it to turn the 

gas control valve/thermostat (counterclockwise.) Do not 

use a pipe wrench or equivalent to grip body.  Damage 

may result.  Do not insert any sharp objects into the 

inlet or outlet connections. Damage to the gas control 

valve/thermostat may result.

Gas Control Valve/Thermostat:

To replace the gas control valve/thermostat, reassemble 

in reverse order. When replacing the gas control valve/

thermostat, thread a 4” section of gas pipe into the inlet and 

use it to turn the gas control valve/thermostat (clockwise.) 

DO NOT OVER TIGHTEN, damage may result. 

• 

Be sure to use approved Teflon® tape or pipe joint 

compound on the gas piping connections and fitting on 

the back of the gas control valve that screws into the 

tank.

• 

Be sure to remove the pilot ferrule nut from the new gas 

control valve/thermostat.

• 

Turn the main gas supply on and check the gas supply 

connections for leaks. Use an approved noncorrosive 

leak detection solution. If such a solution is not available, 

use a mixture of hand dish washing soap and water (one 

part soap to 15 parts water) or childrens’ soap bubble 

solution. Bubbles forming indicate a leak. Correct any 

leak found. 

• 

Be sure tank is completely filled with water before 

lighting and activating the water heater. Follow the 

“Lighting Instructions” on page 17.

• 

With the pilot and main burner lit, check the manifold 

tube and pilot tube connections for leaks. Correct any 

leak found. 

• 

If additional information is required, reference the 

number on the cover of this manual for service 

information.

TEFLON

®

 is a registered trademark of E.I. Du Pont De Nemours and Company.