Question about Rinnai Toyostove Direct Vent Heater: Laser 56 Toyostove Direct Vent Heater

1 Answer

The thermostat setting temperature of my Laser 56 Toyostove will suddenly jump up to a high setting (86) which in turn causes the stove, when not operating, to start up and/or causes the stove, when running, to overheat. The slide control for the thermostat setting remains at the high temperature setting and will not go down to its usual 55 degrees when moves to the left fully. Problem occurs erratically. Replaced the 2 circuit boards; worked for a while and then the problem reappeared.

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  • Brian Niten Sep 12, 2010

    What do you have the set back thermostat set on? That's the lower one.

  • wios Sep 12, 2010

    I have the set back thermostat setting at the minimum setting (55 or so). Thanks for your help!

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  • Master
  • 674 Answers

The reason I asked was to see if it is a power supply problem. If the setback had been set on 86 I would suspect you were having power fluctuations causing the heater to go the setback temperature. I will give this some more thought and post something else soon.

Posted on Sep 13, 2010

  • Brian Niten Oct 01, 2010

    Check for some pinched wires in the heater or a spot where a wire is grounding out.

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