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A.O. smith Promax. green and yellow lights won't go off in turn NO hot water.

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

  • 74 Answers

SOURCE: pilot light keeps going out

Change the thermo-couple.......$5-$10 at any home improvement store. It is a copper wire that is connected to the gas valve/control unit on the heater. Remove it by unscrewing it and bring it into the store with you to make picking it easier.

Posted on Apr 27, 2009

gary1121
  • 332 Answers

SOURCE: Water Heater Won't Fire up

does the fan come on? this has to happen before it will even try to start if it doesn't your problem goes farther into the unit,, normal pracess if the fan then the ignitor then the flame, It could be in the circuit board most people that have gone with the tankless don't clearly ask the question but that is normal, but if you could clearify the procedure of what it is doing to this point i could be more helpful to you---- e-mail me what is happeing diffrent then what it use to do gary1121@aol.com

Posted on Jun 11, 2009

SOURCE: I have an A. O. Smith Model FPSH 40-261 hot water

AO Smith uses the Honeywell ICON gas valve with green indicator light.
Some models use White Rodgers Intellivent with a row of indicator lights.

The gas control blinks the error code:
Open following links to identify gas control thermostat and read possible error codes:
http://waterheatertimer.org/pdf/Honeywell-Gas-Valve-LED-Codes-2000.pdf
http://waterheatertimer.org/BW.html#Temp
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#intelli

Posted on Jul 18, 2011

Testimonial: "Thanks so much for your help. It's exactly what I needed."

SOURCE: To light the pilot on my OS Smith water heater, I

Thank you for providing clear description of product:
Your water heater has intellivent gas control thermostat.
There are always problems with water heaters. It is a huge field.

1) Open following link for AO Smith service manuals.
I do not see service manual specifically for the GP series.
http://www.hotwater.com/resources/product-literature/service-handbooks/

2) Open following link to identify gas valve and download typical service manual:
Some AO smith power vent models have intellivent gas valve, and some have smart valve gas vent. Older models might have knob-type gas valve.
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#intelli

3) More resources:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Posted on Sep 24, 2011

SOURCE: A.O. Smith promax electronic controller is not

Question is not clear.
Do you want instructions to replace valve or want a service manual to test out the parts?
Open following link to help identify gas valve and download possible service manual that applies to that gas valve.
http://waterheatertimer.org/How-to-adjust-temperature-on-water-heater.html#intelli

It is usually recommended that a professionally trained person replace the gas valve.
If you have the intellivent gas valve, then it usually has identifying marks on side of valve, or call AO Smith with the model and serial number from label on side of tank.
Turn off gas and disconnect gas line from side of valve.
The manifold tube and wires are disconnected.
The gas valve unscrews counterclockwise.
If you want more details as the project requires, add a comment with specifics and that sends email that I will answer.

Posted on Oct 08, 2011

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To light the pilot on my OS Smith water heater, I follow the instructions in the label, but nothing happens, no hot water after one hour. Read that there is problems with water heaters, I have some...


Thank you for providing clear description of product:
Your water heater has intellivent gas control thermostat.
There are always problems with water heaters. It is a huge field.

1) Open following link for AO Smith service manuals.
I do not see service manual specifically for the GP series.
http://www.hotwater.com/resources/product-literature/service-handbooks/

2) Open following link to identify gas valve and download typical service manual:
Some AO smith power vent models have intellivent gas valve, and some have smart valve gas vent. Older models might have knob-type gas valve.
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#intelli

3) More resources:
http://waterheatertimer.org/How-to-install-gas-water-heater.html#troubleshoot

Sep 23, 2011 | Water Heaters

1 Answer

I have an A. O. Smith Model FPSH 40-261 hot water heater. It won't heat water. there is a green light on the control flashing. What does it mean?


AO Smith uses the Honeywell ICON gas valve with green indicator light.
Some models use White Rodgers Intellivent with a row of indicator lights.

The gas control blinks the error code:
Open following links to identify gas control thermostat and read possible error codes:
http://waterheatertimer.org/pdf/Honeywell-Gas-Valve-LED-Codes-2000.pdf
http://waterheatertimer.org/BW.html#Temp
http://waterheatertimer.org/How-to-adjust-water-heater-temperature.html#intelli

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