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Back to 10 things for troubleshooting water heater
Icon gas valve
For atmospheric vent models
Range Low 55° - very hot 160°
Average bath 110°F, typical water heater temp 120°
ECO limit 199° F, ECO trips, gas valve fails
TP release water at 210°
All calibrations are approximate
Severe scalding risk over 135°
To reset gas control, rotate dial to OFF, wait 10 minutes for gas to clear. Then relight.
Buy
Reliance/ Honeywell gas control
American / Honeywell gas control
Kenmore water heater gas valve
Craftmaster/ Whirlpool
Bradford White
AO Smith

Honeywell gas control at Amazon
American / Honeywell gas control at Amazon
Honeywell gas valve for propane
Honeywell natural gas valve
Reliance NG at Amazon
Reliance LP at Amazon
Kenmore water heater gas valve
Gas water heater timer fits this valve
Replacement instructions
How to test & replace Honeywell gas control valve
WT8840 replacement manual
How to replace Honeywell gas control valve

Resources WV8840/ WT8840:
Typical installation manual
Typical installation manual/ low NOx
Adjust temp on Honeywell gas valve
Error codes WV8840 series
Error codes WV8840 series
Error codes WT8840
AO Smith service handbook
Service handbook
State Error code/ troubleshoot/ service manual/ FVIR
Bradford White service manual
Error light blinking 4 times
How to light water heater
How to light water heater/ pdf
How to light Whirlpool energy smart

WT8840 product overview and models
WT8840 gas valve manual and troubleshoot
How to replace gas control valves
How to test gas control valve

How to install gas water heater

For power vent and flue dampered models
Range Low 90° - very hot 160°
Average bath 110°F, typical water heater temp 120°
ECO limit 199°F, ECO trips, gas valve fails
Average bath 110°F
ECO limit 199°F
TP release water  at 210°
Buy
Example Honeywell gas control valve at Amazon
Reliance NG at Amazon
Replacement instructions
How to replace water heater gas valve

Resources:
Flue dampered service manual/ atmospheric
Flue dampered/general install and troubleshoot
Dampered troubleshoot codes
Dampered error codes
Dampered error codes
Induced draft troubleshoot codes
Example dampered install manual2

Example power vent install manual
Example power vent install manual
Example power direct vent install manual
Adjust temperature/ error codes on Honeywell
How to light Honeywell gas valve
Error codes and troubleshoot chart
Error codes
Error codes
Icon gas valve error codes

AO Smith service handbook
Bradford White power vent service manual 1
Bradford White power-vent service manual 2
Bradford power-direct-vent service manual
Condensing power vent service manual
Test gas control/ from BW service manual
Sequence of operation
How to clean burner

Safety
Water heater safety precautions
Water heater precautions/ pdf
Gas-water-heater-Safety-Precautions
Gas valve safety
Thermal expansion
Insulation blanket

For power vent models
Range Low 80° to Hot 150°
Error C flashes at 160°
Buy
Buy Intellivent gas control at Amazon
White Rodgers/ Rheem Intellivent gas control
AO Smith intellivent
AO Smith Intellivent at Amazon
AO Smith White Rodgers at Amazon

Replacement instructions
How to replace water heater gas valve

Resources:
AO Smith Intellivent troubleshoot and FVIR test/ pdf
Error codes and adjust temp on Intelli-vent gas valve
How to light water heater
Troubleshoot Intellivent/ pdf
FVIR intellivent troubleshoot .pdf
Intellivent service manual
Intellivent FVIR troubleshoot and reset
Sample manual
Intellivent wiring
Power direct vent troubleshoot
Sequence of operation
Intellivent error codes-troubleshoot
Promax gas water heater manual
Method A... After the unit has been off for at least a minute, plug it in, turn on switch; within a few seconds, depress both arrow buttons on controller, and hold them until the left light begins to blink.  Release them, and within a few seconds, push those arrow buttons in the following sequence:  L/R/L/L/R/L/R/R.  This should reset the controller.
Method B... after FV event on AO Smith
1. Turn off power to water heater for 10 seconds.
2. Restore power to water heater.
3. Within 10 seconds of restoring power, press the two temperature adjust buttons simultaneously until the left (green) “Vacation” LED begins to blink (approx. 5 second delay). Once the Vacation LED begins to blink, release both buttons.
4. Again, within 10 seconds, press both temperature adjust buttons simultaneously until
Vacation LED is on steady (approx. 5 second delay).
5. Release two buttons, the  microcomputer will clear the FVS lock-out and normal
operation will then be restored.
White Rogers thermostat

Buy:
Camco White Rodgers at Amazon

Resources:
Troubleshooting/ pdf
How to light gas water heater
How to replace water heater gas valve


Remove gas valve
Buy:
Buy universal gas control wrench


Larger image
Buy
Gas control valve thermostats at Amazon
Gas water heater thermostats at Amazon
Rheem gas control valve at Amazon
Gas control valve at Amazon
Camco White Rodgers at Amazon
Gas water heater timer fits this valve
Replacement instructions
How to replace water heater gas valve
Resources:
Service manual
Service manual 2
Service manual 3
Operation and safety
How to light water heater/pdf
General troubleshoot manual /pdf
White Rodgers gas control valve replacement pdf
Power vent water heater issues
Magnet testing
Test thermocouple
Gas valve testing
How to light gas water heater
White Rodgers NG replace, install, set temp
Honeywell Smart Valve AO Smith
Honeywell Smart Valve
Larger image

Resources:
Temperature settings and features
Smart valve error codes
Service manual
Install smart valve & troubleshoot
Robertshaw Natural gas control valve
Robertshaw Natural gas
Buy
Robert Shaw natural gas
RS Natural gas at Amazon
Camco RS at Amazon
Gas water heater timer fits this valve

Buy
Gas water heater thermostats at Amazon
Robert Shaw natural gas
Robert Shaw propane gas
Replacement instructions
How to replace water heater gas valve

Resources:
Robert Shaw models
Robert Shaw/ Unitrol troubleshooting/ pdf
General troubleshoot/ pdf
General troubleshoot manual /pdf
How to light water heater/pdf
Magnet testing
Test thermocouple
Gas valve testing
Operation and safety
Recalibrate gas control/ pdf
How to light gas water heater
Adjust pilot on unitrol gas control valve
How to test White Rodgers gas valve p14
How to test Honeywell Icon gas valve p23
How to test Robertshaw gas valve p14
Atwood gas control valve
Atwood gas control valve
Fits all Atwood water heater that have a pilot light

Buy
Atwood gas control valve at Amazon
Atwood parts at Amazon
Atwood water heaters and parts at Amazon
Resource:
How to replace gas control valve thermostat
Atwood water heater troubleshoot resources
Suburban water heater service manual

Honeywell L4006 water heater controller
Honeywell immersion thermostat
12-277 volt AC SPST controller
12-48 volt DC
Add to any hot water tank
Surface mount or immersion into tank
Temperature range: 100-180°F
Water over 135° poses extreme danger of scalding.Image above shows Honeywell gas control valve
Add mixing valve.

Buy:
Honeywell/ Rheem SP11798B
Honeywell L4006
Line Voltage Mechanical Thermostats

Resources:
Add another thermostat to gas or electric water heater
Advantages-disadvantages mixing valve
Control recirculation pump using controller
L4006 manual
L4006 wiring illustration
Honeywell L8104 water heater controller

SIT gas control valve for water heater
SIT gas control valve for water heater
How to light and set temperature SIT gas control


Kenmore with power anode rod
How to light Effex water heater
Effex service manual

Suburban water heater service manual
Whirlpool energy smart gas water heater manual

Robert shaw gas control valve
Robert Shaw 120Volt input gas control valve
Wiper Control and Gas Valve assembly
Triangle pointed upward is 120 degrees F
Replacement for Rheem power vent/
Buy

Rheem wiper SP20123A thermostat KIT
Wiper SP20123B valve/ no thermostat


Resources
Larger image
Error Codes and troubleshoot
Guardian power vent Robert Shaw error code
Rheem parts list
American power flex parts
General manual with lighting instructions
Replace water heater gas control and FV
Check pressure switch, blower, gas control
Sequence of operation
How to light water heater
To reset: turn the red control knob on and off 6 times within 30 seconds to reset the board.
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