Question about Rinnai Toyostove Direct Vent Heater: Laser 30 Toyostove Direct Vent Heater Shipping

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EE2 code on cold start

I resently changed my filter and cleaned the fuel screen and even cleaned out the fuel bowl on my toyo laser 73. Now the unit will run perfectly all day until the weather warms up. When it cycles off for a prolonged period two or more hours and restarts it will not start and gives a EE2 code. If I then press the red button on top of the fuel pump assembly and restart the unit, it will run perfectly again until it cycles off for any prolonged period again.

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  • mcnultyj Nov 05, 2008

    thanks for the suggestion but I found the real problem was the height of my new 275 fuel tank. Evently the tank was topped off moe than 8.5 ft above the bottom of the unit causing excessive fuel pressure forcing the float into the magnetic safe position. when I fired the unit on a cold start it would cycles for a short time and then shut down with the EE2 code. Once I pumped a 1/4 of the tank she runs fine. i guess for now on I can only fill it to the 3/4 mark or cut down the legs on the tank....Thanks again for your suggestion.......


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To clear the code the easy way, unplug heater for at least 30 minutes.While you are waiting, check your fuel tank to see if you have fuel.Then check filter to make sure the element is not clogged and thatthere is no air or water (or ice) in the fuel line. If you find aproblem with any of these things, correct it before trying to startheater again.

From another thread:
Laser heaters cease operation and display the EE2 code on the control panel when the primary
flame rod on the heater fails to sense a flame during the first 5 minutes of the Ignition and Pre-
Heat cycle.
What Can Cause An EE2 Error? The primary flame rod is the only sensor in the heater that
can cause the EE2 error. Thus, if it occurs, either there is (1) no flame to detect, or (2) the
sensor failed to detect the flame. The flame rod is located on the lower 1/3 of the burner. It is a
heavy wire with a ceramic insulator. A single white insulated wire connects this device to the
main circuit board. Replace the flame rod.

Not having a cleaning in the last couple years may be the problem.Carbon build up in the burner pot and on the flame rod (a chain ofcarbon) will cause the flame to not be sensed. Then the flame will burnout. A temp solution would be to unplug the stove, then unscrew andjiggle the flame rod to break the chain. When tightening the screws donot over tighten. You could also try hitting the edge of the pot to seeif you can knock the carbon loose. You could also have a warped burnerring which would cause problems keeping the stove running.

Please see these posts as well:

This document also should help:
The Heater Will Not Operate. EE2 Code or Reset Light Displayed

Posted on Nov 05, 2008

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EE2 code is usually fuel related, did you check that the fuel pump is not faulty.

Posted on Nov 05, 2008

  • Ginko
    Ginko Nov 05, 2008

    EE2 is fuel error.
    It looks like you have a faulty fuel pump that stops when overheats.

    By pressing the red button you reset and restart the system and restart the fuel pump.

    If the fuel pump is ok, check all the fuel filter, a dirty fuel filter or a clogged fuel line can cause not enough fuel being pumped into the gas chamber, and there you get the problem and the system stops.

    I also quote from EE2 code for toyo 56 - FixYa.

    "An EE2 error code is usually fuel
    related. What does your Toyo do before the EE2 code shows up? The
    firing process is the burner button blinks green for 7-9 minutes, then
    it clicks up to the medium, yellow light which starts flashing. That is
    when the fuel pump starts pumping. If you hear a fairly audible tic
    tic, or thump thump coming from the fuel pump then that is your
    indication that the fuel pump is starving for fuel. You either have a
    fuel line restriction, too little fuel, a clogged filter, a clogged
    sump screen, or rarely, a failing fuel pump. Usually, it is a fuel line

    you hear no tic tic or thump thump and it just goes off on EE2 then the
    problem is in the burn chamber. You may have a carbon chain in the
    chamber causing the flame sensor to temporarily short out. You can
    clean the flame sensor, fuel nozzle, and igniter to resolve this
    problem until you can get your Toyo tuned up."


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