American Water Heater VG6250T76NV Series 100 User Manual

35

Please check guidelines below. For your safety, water heater service should be performed only by a qualified service technician.

Read the GENERAL SAFETY INFORMATION section first.

INTELLI-VENT TROUBLESHOOTING CHART - USER CONTROL

The gas control valve/thermostat 

has sensed inadequate or no earth 

ground.

1  Ensure the wall outlet (power supply) is properly

grounded.

2  Ensure all ground connections/wires on the water 

heater are securely connected.

The gas control valve/thermostat 

has sensed reversed polarity in the 

120 VAC power supply.

1  Ensure the wall outlet/power supply is properly wired.

2  Ensure all internal 120 VAC wiring connections and 

wiring harness have no reversed wires. 120 VAC "hot" 

wire must connect to the on/off switch.

Pressure switch circuit remaining 

closed for more than 5 seconds 

after heating cycle begins.

1  Ensure air pressure switch circuit wiring is correct and 

the air pressure switch is not jumpered.

2  Replace the air pressure switch.

Pressure switch circuit remains 

open longer than 5 seconds after 

the blower is energized.

1  Ensure the air pressure switch sensing tube is properly 

connected at both ends and is not kinked or damaged.

2  Ensure the correct size of vent and intake air pipe (direct

vent products) was used per the installation instructions

in the manual that came with the water heater.

3  Ensure maximum number of elbows or maximum 

equivalent feet of vent or intake air pipe has not been 

exceeded per the installation instructions in the manual 

that came with the water heater.

4  Ensure there are no obstructions in the vent or intake air pipe.

The gas control valve/thermostat 

has detected an open igniter circuit.

1  Check wiring to the hot surface igniter assembly - 

replace igniter assembly if wiring is damaged or worn.

2  Check resistance of the igniter at igniter assembly 

plug - should be between 11 and 18 ohms at room 

temperature (77° F at plug end) - replace igniter if open

or shorted.

3  Check igniter assembly plug and the socket on the gas 

control valve/thermostat for good connection.

4  Replace igniter assembly if the plug is worn or damaged.

5  Replace the gas control valve/thermostat if the igniter 

assembly socket on the bottom of the control is worn or 

damaged.

Ignition/flame failure.

The gas control valve/thermostat 

has reached the maximum number 

of retries (3) for ignition and is

currently locked out for one hour.

Cycle the power to the water heater 

off and on to reset.

1  Ensure flame sensor is making good contact with the

burner flame and ensure flame is steady. Also ensure

supply and manifold gas pressures are within the 

requirements in the installation manual.  

2  Gas supply is turned off - pressure is too low. 
3  Ensure the flame sensor is clean - use fine steel wool

to clean the flame sensor.

4  Check igniter assembly plug and the socket on the 

bottom of the gas control valve/thermostat for good 

connection. Replace igniter assembly if the plug is worn 

or damaged.  Replace the gas control valve/thermostat if 

socket is worn or damaged.

5  Replace igniter assembly.