I have a Rinnai Convector 404 Running ok but is not working to its max

Gas appliance should be serviced by an authorised person only.

https://www.rinnai.com/inquiry/

https://manual-hub.com/manuals/rinnai-convector-404-01-pdf-manual/

The Rinnai 404 says it has
Input: NG, 17 MJ/h, TG 17 MJ/h Propane 17 MJ/h (15 MJ/h (Vic).
Let's work with propane at 17 MJ/h. https://www.manual-hub.com/manuals/rinnai-convector-404-01-pdf-manual
That's 4.72 kwh according to http://unitconversion.org/unit_converter/energy.html
But that's input. I don't know what the efficiency of the unit is, but let's assume 85%. 4.72 * 85%= 4.01 kwh output.

See page 9 of the online manual at https://www.manual-hub.com/manuals/rinnai-convector-404-01-pdf-manual
It drops the temperature 1C after 30 minutes and another 1C after 30 more minutes.

The owner's manual at http://rinnai.co.nz/tradesmart/upload/files/productfile/portable_convector_rce417_operation_and_installation.pdf on page 10 says to vacuum both filters weekly. It also warns not to wait for the filter lamp to come on since overheating may occur.

rinni convector 404 lights then keeps switching off

I would call him back out. It sounds like a gas line is loose or the vent is not on properly

No conversion parts available since 2005.

You have a dirty pilot assembly and maybe even a bad ECO switch (safety switch). I would suggest replacing the ECO and removing the pilot assembly and clean it out.

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