Rinnai Ultima II Inbuilt Questions & Answers

The thermostat is on the heater,which you wouldn't think would be ideal but it seems to work fine.

Yes, that is normal for this model. I set mine on gas econ auto off to a couple of degrees higher than what it says the current temp is, eg, first thing in the morning, I boost it from L (which is where I leave it overnight and the temp this morning was 14 on the current temp in the room, we live in a very cold climate, minus 4.2 this morning) to say 18 or 19 and then the current temp starts to rise and will cut out when it reaches the 18 or 19, which is what I will need, as we are going for a max of 9 degrees today and unless I need to make it any warmer, then it will cut in and out during the day from green to red light - I don't normally need to touch it again until I drop it back to L overnight. Hope this helps, it takes a bit longer to get used to than the last model that I had.

Thanks still waiting for service 18/07 thats too long to wait

Sorry Jenny, I haven't had anything like that happen to me, maybe you could call your installer to see that they haven't missed something in the installation.

I am having the same issue, have you any idea on how to fix?

Hi I have this same problem... any answers would be greatly appreciated.

Thank you. Is Combustion Fan Failure covered by Rinnai please? The plumber that fitted this heater attended today and was not able to fix it. He is going to get the Gas expert to come out. The plumber will be sending me a Service Call account and so will the Gas repair man. Will Rinnai cover these expenses? Thank you Stacy

Steven I can only tell you that when Code 61 flashes it means Combustion Fan failure and you need to call a service person. I would be calling the company that did your service pronto !!!

Take the face off the heater. instruction manual shows how. Find the flame reader rod/thermostat, bottom left. Use a thin file to get to it, file off the built up carbon, which insulated and stops the flame from registering. Then vaccum all vents and inlets. I have to do this every season for it to work properly. computerized heaters are too sensitive. Ultima ll is a piece of pop
for this reason. A real let down from a highly regarded manufacturer.

Thank you for your prompt reply.

Hello Tom, error 61 is a failure with the combustion fan and you need a service call, according to the manual. Hope it's not a new heater and certainly worth checking on your Warranty ! Good luck with that, hope you have better luck than I did . Mary

I too have an error 61 - May/June 2015. Technician came out and serviced the heater and reported to me that water is getting in through our chimney. Re-cement the top of the chimney - which my Husband did. It worked intermittently and the Tech came out again and suggested we pull the cladding off the chimney and repaint it- it's not drawing properly! Why would this happen all of a sudden with not one problem in the previous 18 months of having a new heater? It then stopped working altogether. It actually started for one hour last week and that's all. So here I am with an expensive heater that hasn't worked since this time last year because I'm stuck between a Tech and a Husband who doesn't believe a word of what he is saying. Can someone please advise me?

I was finally desperate enough to call Rinnai - they were actually very helpful, and fixed it free of charge. It has been fine since. It does look as though we'll have to pay to get the heater cleaned and serviced every year or two, which is unfortunate, but bearable, once you know that's all it needs, and you can sort of schedule it. John K