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Rinnai Convector 404

Hey peoples,
Not sure how serious this problem is but from other responses posted here it looks like I've come to the right place.
As the subject would suggest I have a Rinnai Convector 404(gas heater), which I purchased last year from a garage sale. Unfortunately, it didn't come with a manual, and I'm finding it rather difficult to track the right manual done.
Essentially, when I try turning the heater on, the ignition light comes on and it sounds like the gas is kicking in...however, it seems like it can't maintain it.
It shortly shuts off, the fan sounds like it cuts off and there is a high pitched ringing sound. There are no lights etc that come on at this stage..(ie/ the filter light doesn't flash on).
I have checked the filters at the back of the heater and brushed them off. (Although there was very little dust there in the first place?)
I can manage to turn the heater on after about 5 or 6 attempts...but not knowing what's actually going on with it seems rather dangerous to my way of thinking...
Any suggestions would be greatly appreciated 8)

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  • pinkinfinite May 06, 2008

    Excellent!!! Very thorough details..and it would seem very timely as the job you did today was fresh in your mind! Thankyou so much for your prompt response. I look forward to a warmer house tomorrow night. Thanks so much for your help 8)

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Hi pinkinfinite,

The 404 is a great heater. I am assuming it is a Natural Gas Heater. All it needs is a good blow out with compressed air. They tend to carbon up in the pilot light area. You will probably also find it is very dusty inside. Easiest way to clean the carbon out is to remove the hose at the heater and with compressed air blow through the fitting where you have removed the hose. Make sure you hold down the start button so the air can get through to the pilot light and jets. Don't connect the electricity for the fan when you do this.
To clean it out internally you only need to remove the front panelling. There are two screws holding the top panel (not to be confused with the side and top). The screws are located inside the bottom grill at the front. There are also screws for the bottom grill there which you will also need to remove and probably best to remove the bottom panel that house the front feet. It should expose all the inside workings of the heater except for the pilot light and jets etc. You should be able to see the fan - it is round and looks like a filter and sits behind the vent section. Make sure you give it a good blow out - it gets all dirt and dust around it. When you do it remove both the rear filters/covers. They are mesh. Blow the top one which is the larger metal one and make sure you blow inside where it fits over to remove the dust and dirt. Same with the other one which should be plastic with mesh. Once you do this put it all back together. Make sure all wires are connected and be wary with the compressed air as it may blow the connectors off from loose fitting parts. Once you get it all back together Test it and hopefully it should work. Hope this helps. I did one the same today that was having trouble starting and it now works like a new one.

Regards
Bryan

Posted on May 06, 2008

  • Bryan Levi May 06, 2008

    No worries - glad to be able to help. Most heaters work the same way and nine times out of ten it relates to the pilot light or jets that carbon up or are dirty. During winter often heaters get a bit of moisture in them from non use and being stored. A blow out before you use them often helps. When you finish doing the 404 you may find it will take a couple of goes to get it going again - it's just till the gas gets through the piping and then it should be ok.

    Good luck with it.



    Regards

    Bryan

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We have just purchased second hand a Rinnai Convector 404 LP gas heater as there are no instructions on the right procedure to light and run effeciently and what it means if the filter light comes on and off does anyone have any suggestions

Posted on May 24, 2010

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