Question about Rinnai RHFE-1004FA 38,400 BTU Energy Saver Ductless Heater - LP Gas

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The heater keeps shutting off , getting a 99 code

The heater is shutting off, the outside indicator is flashing red and the inside temperature gauge is flashing 99. I have plenty of gas and it will restart, but then go off and begin flashing 99 again.

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  • seapoint416 Jan 31, 2009

    I just read another posting on here, it said that a 99 code could mean that the flu was blocked, so I tromped out through the snow to check the flu. Sure enough it was covered in inch thick ice, which I knocked loose. I came in shut the heater off and then back on...whahla...its back to running just fine. Thank you!!!

  • terry80403 Feb 07, 2009

    I have the same problem but there is nothing visibly blocking the flue. I looked inside the flue with a flashlight and did not see anything that is blocking it. Could the blockage be in one of the hoses to the flue? Also I am concerned about running the heater until I find the problem even though it comes on most of the time. Should I be concerned?

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Terry,

Remove the flex hose from the flue pipe inside the house. Try to start the stove. If it runs there is a problem with the flue. If it's been very cold look closely at the pipe around the exhaust pipe. That is the air side. There could be frost built up inside the air pipe. If so it will shut off the gas and you can't run the stove.

Tom Hawkins
hawkins111@gci.net

Posted on Feb 26, 2009

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