Hello bought a Rinnai 404 convector , when I start it the alarm comes on after a few seconds , thanks in advance , Jim

SOURCE: Mt Rinnai convector 516tr will not start, have

I have had this problem due to the heater 's combustion sensor concluding that all was not well. In my case, the heater had burned up too much of the available oxygen. I didn't notice the lack myself, so it must be very sensitive. I had shut the place up to keep the heat in and eventually it dawned on me to open a door for a minute or so every half hour or so to replenish the oxygen supply.

The situation is worst when the place is very cold as the heater will roar away trying to heat it up as quickly as possible. After I came back for a holiday in winter, I had to set the temperature down to "L" and "Economy" on plus run an electric fan heater for a day to warm the structure to the point where the gas heater could relax and not burn oxygen faster than it could heat the space.

SOURCE: Rinnai Convector 404 Natural Gas

No conversion parts available since 2005.

SOURCE: Have a Rinnai convector 404

Most likely it is a problem with the gas pressure or the air adjustment. You will need a Manometer to be able to check it and adjust it so I would recommend you call your local gas technician. If you have a shut-off on the unit, you can test this by throttling down the valve till the whistle diminishes however this is not a fix, just a diagnosis.

SOURCE: I am having problems with turning my gas heater (

This noise you hear may be a result of a gas pressure problem to the heater. Generally, it's caused by low pressure. Low, meaning below the the standard required by the manufacturer for this heater. The gas regulator on the heater may be stuck in a partially open position or the line that furnishing the gas to the heater is to small in diameter. Also, check the gas line shut off vale, to make sure it's fully open.

Hope this helped you troubleshoot and solve the problem.

SOURCE: Our Rinnai convector unflued room

According the the Owner's Manual for your Rinnai Convector Heater, there are 8 things, than can cause what you described. Two of which can be discounted, unless you just had the heater installed.

I have provided a link to the Owner's Manual, that you can download and print for future reference. Please pay close attention to Page # 6 -Pre-Service Check List and Fault Finding. Each problem listed has a troubleshooting solution.

http://www.rinnai.com.au/images/stories/operating_instructions/Heating/Portables/Granada252/portable_radiant_convectors.pdf

Hope this helps you to further troubleshoot and solve the problem. Please let me know. Cheers!