How to troubleshoot gas water heater

How to repair Rheem FVIR
FVIR troubleshooting guide
Symptom of FV failure
'If pilot stays on without problems as long as gas valve is in PILOT position, but you then turn to ON position and main burner flutters and disappears within 30 seconds then 99% chance TRD is tripped.' (On Rheem heaters, look for signs of shattered glass on combustion floor.)
Same symptoms can be bad gas control

Troubleshoot by gas control valve
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Troubleshooting/ pdf Service manual for power vent model Service manual for atmospheric model How to light gas water heater How to replace water heater gas valve White Rodgers Propane replace install, set temp	Service manual Service manual 2 American Standard service manual 6Mb size White Rodgers gas control valve replacement pdf Power vent water heater issues Magnet testing How to light gas water heater How to replace water heater gas valve White Rodgers NG replace, install, set temp	Honeywell Smart Valve Larger image Temperature settings and features Smart valve error codes Smart Valve service manual Service manual Service manual Install smart valve & troubleshoot AO Smith Service manual
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Honeywell electronic water heater controllers	Power vents: Power vent water heater issues American power vent service manual Anode covered by power vent	Robert Shaw 120Volt input gas control valve Wiper Control and Gas Valve assembly Triangle pointed upward is 120 degrees F 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
Larger image Clean air intake on AO Smith, State, American, Reliance, Whirlpool water heaters Rheem, Richmond, Ruud, GE heaters require removal of combustion parts to clean arrestor screen inside unit.	Soot implies dangerous situation Gas may not be buring fully See image on right Soot on top of heater also implies danger.	Flame should burn clear blue Low gas pressure. Dirty combustion parts. Poor incoming air supply. Inadequate venting. This is dangerous because unburned gas can accumulate inside combustion chamber or inside the flueway. Causing ignition. This situation will overheat combustion chamber and trip ECO, TCO and FV system, causing water heater to stop working. Follow product manual for correct maintenance protocol

	How to test water heater vent. Let main burner operate for 5 minutes. Then put match near vent hood. Smoke from match should get sucked into vent Water heater vent test/ pdf Checking the draft Read more at Tank

See larger During typical water heater combustion, hydrogen content of fuel is burned and the result is hot gases. One of these hot gases is steam or water vapor. Adequate venting or air draw up vent is required so gases vent outside. When there is inadequate draw, the water vapor cools and condenses on inside wall of vent pipe. This condensation water is acidic (pH 3-5) and corrosive. It will corrode steel metals and other materials. Improper venting causes water to drip down vent into combustion chamber of gas water heater. Parts inside combustion chamber rust. Holes develop in bottom of water heater. Inspect combustion chamber for rust and water. If steel vent pipe is not venting, the vent pipe will rust and get holes, or joints will fall apart. This situation causes hot gases to enter home and poses serious risk of odorless CO poisoning. Simple test for proper venting: Pipes are not rusted or covered with white condensate. No water on top of tank. Burner inspection does not show excessive rusting. Light match under vent pipe and see if smoke immediately draws upwards. If smoke does not draw, then call plumber.	Flue Pipe Safety Read manual for flue pipe clearances so hot vent pipe does not touch or come near combustibles. Rusted flue pipe -or-water on top of gas water heater could indicate serious problem. Call a plumber if you are uncertain. Check pipes and flexible connectors for leaks. If water coming from flue pipe: 1. Vent cover could be missing > rain water entering flue (replace cover) 2. Flue pipe clogged with bird nest or come apart or damp from improper venting: danger of odorless Carbon Monoxide poisioning Serious danger from CO poisoning, a plumber should be called if you are uncertain about vent pipe water leak Read troubleshooting at forum See u-tube video Read about CO detector How to replace anode rod
	Minimum distance of vent pipe from window Side-wall vent pipe must be 4 feet away from windows and doors. And 3 feet away from inside corners. Larger image with more information Power direct-vent clearances Venting a gas water heater Conditions where outdoor air supply is needed

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How to troubleshoot gas water heater

Prevent problems