Question about Dometic RM2652 Refrigerator

2 Answers

Dometic rm2652 re-ignitor

Just purchased 2005 trailer. The first time out the Dometic rm2652 fridge works, but, the re-ignotor constantly clicks to ignite the gas after it is already lit. Tried ignoring it to see if it would eventually go out and it does, after the voltage drops below about 9.5. Is this normal?
To continue use on our trip I would let it start/light and then pull the yellow wire from the reignitor. When the check light would evetually come on because it could not reignite I would have to reconnect the wire, let it light, and then disconnect it again. The reignitor gets its voltage directly from the the same wire or signal that opens the gas valve. It looks like it is operating normally according to the schematic but it does not seem right, to have to listen to clicking sound constantly until the voltage drops.

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  • graytw Sep 14, 2008

    The suggested remedy resulted in the ignitor rapidly clicking as usual but with the electrode disconnected, no spark. Expected result. The ignitor begins firing away as soon as the gas valve is open. This would be expected but then how does the ignitor know when to stop igniting after there is a flame? It is wired directly to the gas valve solenoid as the schematic says it should be.
    It is an automatic temperature controlled fridge. So I believe the flame goes out when cold enough then reignites when necessary for the temp to remain cold. The problem is I need to remove the yellow + wire from the ignitor to stop the continuous clicking, then it cannot reignite when it needs to so the check light comes on.

  • graytw Sep 14, 2008

    Thanks for the service manual. Here is a description of reignitor operation;

    "On gas operation the igniter senses the resistance

    through the flame between the electrode

    and burner. When there is no flame at the

    burner, the resistance is high and the igniter

    begins sparking to light the burner. As soon as

    the flame is lit, the resistance between the

    electrode and burner drops and the igniter

    stops sparking. The resistance is monitored by

    the igniter, and, if for any reason the flame

    goes out, the igniter begins sparking until the

    burner is lit."

    My electrode sparks fine but when it sees flame is the resistance not dropping as described to disable the ignitor? Is that possible, it is just a wire and it sparks fine?

    It is not grounded, what is it resisting?

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Dear sir/madam,

Turn the refrigerator off and remove the wire
between the electrode and igniter. Now turn the
refrigerator to the gas mode. If no internal
clicking sound is heard the igniter is defective.
It is important to remove the high voltage wire
that goes to the electrode from the igniter when
you are checking the igniter for operation. The
high voltage wire and the electrode can be
shorted to ground causing the igniter reigniter
to think that the flame is lit, resulting in no
spark on gas operation.

thanks
good luck

Posted on Sep 14, 2008

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  • Dometic Master
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Here you can also check the entire service manual:
Manual Refrigerator Diagnostic Service Manual
Thanks for using Fixya.

Posted on Sep 14, 2008

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