American Water Heater Residential Gas Water Heaters Benutzerhandbuch

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If the Main Burner ignites momentarily but does not sustain ignition 

allow the water heater to try to ignite up to two more times until 

control  system  locks  out  and  the  Ignition  Failure  Fault  message 

is  displayed  on  the  control  system's  LCD.  If  the  water  heater  is 

experiencing rough starts - see Rough Starting, Rough Operation 

on  this  page.  For  momentary  ignition  problems  without  rough 

starting check the following:

•  Incorrect manifold (offset) gas pressure.

•  Undersized supply gas line (low volume of supply gas).

•  Low Gas Pressure

•  See the list of possible causes and things to check and repair 

for the Ignition Failure Fault message.

•  Clogged/blocked intake air screen(s).

•  Clogged/blocked Main Burner.

•  No  power  to  the  water  heater,  check  breaker,  fuses  and  the 

water heating Enable/Disable (on/off) switch.

•  Hot water supply valve(s) to fixtures closed.

•  Operating Set Point is set too low, Differential setting is set too 

high.

•  Temperature Probe Offset setting are causing the heating cycles 

to terminate prematurely.

•  The heating capacity of the water heater has been exceeded, 

the water heater is unable to meet demand.

•  Colder  incoming  water  temperature  lengthening  the  time 

required to heat water to desired temperature.

•  Hot water piping leaks, open faucets, water heater drain valve 

leaking or open.

•  Sediment  or  lime  scale  accumulation  may  be  affecting  water 

heater operation.

•  Operating Set Point is set too high.

•  Temperature Probe Offset settings improperly set.

•  Normal operating noise of electrical components; Combustion 

Blower, transformer hum, relay contact closure.

Replacement  parts  may  be  ordered  from  the  manufacturer, 

authorized  service  agencies  or  distributors.  When  ordering  parts 

be sure to have the complete water heater Model Number, Serial 

Number  and  Series  Number  available.  This  information  can  be 

found on the rating plate affixed to the water heater.

Refer  to  the  parts  list  for  more  information  or  call  the  parts 

department or technical support phone number listed on the back 

cover of this manual for further assistance.

Read and understand this instruction

manual and the safety messages

herein before installing, operating or

servicing this water heater.
Failure to follow these instructions and

safety messages could result in death

or serious injury.
This manual must remain with the

water heater.

This section of the manual is intended to be an aid in correcting 

common operational problems, it is not all inclusive. The installer 

may be able to observe and correct certain problems which might 

arise when the water heater is first put into operation or when it is 

re-fired after a prolonged shutdown. However, only qualified service 

technician  should  perform  any  service  procedures  on  the  water 

heater. 

NOTE: Call the technical support phone number listed on the back 

cover of this manual for further technical assistance or to locate a 

qualified service technician in your area.

Turn off gas lines during installation.
Contact a qualified installer or service

agency for installation and service.

Excessive gas pressure to gas valve can

cause serious injury or death.

Do not use water heater with any gas

other than the gas shown on the rating

plate. 

•  Undersized supply gas line (low volume of supply gas).

•  Low Gas Pressure.

•  Excessive supply gas pressure.

•  Excessive manifold (offset) gas pressure.

•  Incorrect Fuel Type

•  Vent (exhaust) gas recirculation at the vent and intake air pipe 

terminations on Direct Vent installations.

•  Excessive equivalent lengths of intake air and/or vent (exhaust) 

piping installed.

•  Clogged/blocked intake air screen(s).

•  Clogged/blocked the Main Burner.

Do not reach into the burner housing or

combustion chamber if the water heater

is still hot.

Allow the water heater to cool and always use

gloves when handling the main burner.

The combustion chamber and burner sleeve 

and housing become very hot during operation.