Question about RTO Atwood Water Heater - 6 Gal LP

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Heater when switched for gas operation will send spark to ignitor and ignite for approx. 5- 6 seconds and go off.Will do this 3 times and lockout?

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Have you tried positioning the electrode closer to where flame is? That also senses flame to keep gas valve open, and if not sensing flame, with cause it to shut down. Clean it with a small brass brush, or similar, and make sure it's getting good flame from burner directed at it. Let me know if that helps. Do you by chance have a multimeter, or 12 volt test light for troubleshooting ?

Posted on Apr 25, 2010

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Igniter on gas water heater only sparks once


First pull the ignitor wire off the ignition module...hold a screwdriver 1/8 to 1/4 inch away from the electrode pin on the module then turn the unit on to see if it sparks differently than what you described before you replace the ignitor.

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Hotpoint water heater the electric igniter won't spark


Copy following link for troubleshooting igniter, and troubleshoot by type of gas control valve:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#igniter

Add a comment and say what manufacturer appears on label.
Open link above and scroll to top for information about FV lockout.

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Rheem Intelli-vent intermittently goes in lockout mode


Rheem does not post service manuals.
However AO Smith has posted relevant service manual:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html#intellivent

Have you cleaned the air intake located under combustion chamber, and inspected for broken glass vial?
Rheem FVIR system uses glass vial that breaks if combustion air is slowed, and resulting combustion causes slow-moving venting of hot gasses, causing overheating that breaks glass vial.
http://waterheatertimer.org/How-to-repair-Rheem-FVIR.html

Check gas pressure.

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I have an Atwood waterheater model # G6A-8E. I am having issues with no spark from the ignitor , I have used a long stem lighter to light the burner. It lights and burns well for a couple second seconds...


When you turn it on and hear the ignitor clicking, test for 12 volts at power wire to gas valve. If your not getting 12 VDC to gas valve when ignitor is sparking, replace module.

Jul 10, 2011 | RTO Atwood Water Heater - 6 Gal LP

1 Answer

The water heater red light keeps flashing rapidly on my Powervent 2 model 41VRP40N. It is not producing hot water and when I read the manual it says it needs more heat. What does this mean. How do I fix...


There are many things to check. The single most important test is for 24V at the gas valve after the ignitor is supposed tp be on. 19 V or less and there is either a bad ground or the ingition control board has failed. (Wire ground problems are a high probablilty)

Here is what the book says:

PROBLEM #1 - HOT SURFACE IGNITOR DOES NOT GLOW RED

(Remember to wait for purge time, 17/34 seconds, on models so equipped).

Possible causes

A. No main power

B. Faulty transformer

C. Faulty thermostat

D. Faulty limit switch

E. Faulty blower interlock switch

F. Faulty hot surface ignitor

G. Faulty ignition control

Solution

Step #1

Perform normal system checks of main power, transformer, thermostat, limit

switch, blower interlock switch, and replace faulty component.

Step #2

With power on and thermostat set at its highest position, check voltage

between "TH" and "TR" on HS780 ignition control. If 24 volts is not present

check output at transformer. If no, replace transformer. If transformer

checks out OK look at other controls in the 24 volt circuit I.E.: thermostat,

limit switch, blower interlock switch. Check for 120 volts between "neut"

(L2) and "120" (L1). Check for 120 volts at the ignitor across "IGN" and

"IGN" terminals on the HS780 ignition module. If 120 volts is present,
replace ignitor. If no, replace the 780 series module

PROBLEM #2 - IGNITOR GLOWS RED BUT MAIN BURNER

WOULDN'T LIGHT

Possible causes

A. Improper ignitor alignment

B. Faulty ignition control

C. Faulty gas valve

D. High inlet gas pressure

E. Polarity reversed

F. No earth ground

Solution

Step #1

Check for availability of gas at gas valve. Make sure the manual valve

upstream of the gas valve and the gas valve are in the full on position. Also

make sure gas is being supplied to the system at the proper pressure, too

high will lock-up the valve.

Step #2

Check proper polarity of "NEUT" and "120" on the ignition control by reversing

the wires, if reversed gas valve will not open. If this does not solve the

problem, replace wires as they were.

Step #3

Check for proper ignitor position.

Step #4

Check for a good earth ground by using a meter connected between L1

and furnace chassis. Should read 120 volts, if no, check and/or repair ignition
ground wire or ignition control mounting screws.
CAUTION POLARITY MUST BE OBSERVED

Step #5

Check for 24 volts at the gas valve terminals; "1" and "2" on a 7200 series,

"M" and "C" on a 7100 series, "TH" and "TR" on a 7000 series. If yes,

check wire integrity or change the gas valve. If no, change the 780 series
ignition module.

That is pretty much all of the troubleshooting required.

Thanks for choosing FixYa,
Kelly

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The electronic ignition on a gas water heater will not heat up and glow red to ignite the gas to heat the water atwood r/v water heater


You won't see any red glow until the burner ignites and burns for a while. Its only an ignitor and flame sensor, not a glow plug style.The ignitor has to provide spark for gas to ignite, then it also senses the flame and keeps gas flow coming. What exactly is happening when you turn it to on?

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Hi .. if this is a brand new heater, then you probably need to have the gas line bled. This means getting all the air out of the gas line feeding the burner. This can be done by constantly trying to light the burner or poilot . or it can be bled down by a HVAC tech.

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1 Answer

Lock out light


these furnaces have a sequence of operation , 1 thermostats calls for heat,2 purge fan checks flue is open and not clogged ,3 checks to see if hot plate ignitor or spark ignitor is on 4opens gas valve 5 checks for flame and allows valve to stay open 6 checks for temperature rise and brings on fan , if any of the process is not there or interrupted trys 3 times and defaults to lockout , that is the best answer with out knowing what type you have , hope i helped

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