The unit, just after 12 months, started to fail to ignite. Turned the hot water on and off for half an hour or so before it worked. It has stopped again, several times, when not run for a day or two.. Its now stopped again and I can't get it to work. Can smell the gas turning on but its not igniting.
Cold weather and absents seems to upset it.
It really upsets me.

Very happy with our Rinnai Infinity 16. Previously had a Bosch hydropowered which was very temperamental especially in the colder months. But not the infinity. Very reliable and consistent hot water. We did not purchase the temp controller, but did have a temp valve installed so we could have the unit preset at 60 degrees. Highly recomend this product.

My B16 unit is only 5 years old, it works fine during summer but when the temperature drops and we turn the hot water on the pipes groan and there is no water pressure at all, after the sun comes up and the unit gets a little heat it’s all good again.

We have had the Rinnai 16 for a number of years, has been ok but a little temperamental with water fluctuating in the taps.
Taps can only run on hot or cold alone, otherwise as soon as the temperature is balanced the hot water will turn off. Recently our shower has started fluctuating from very hot to cold, I can see the wall control operation light turning on and off.
Do you know what the problem would be?
Ps I did leave this question in the Q&A section however my question disappeared. Thanks

This water heater has been very good with no trouble at all the gas usage has been significantly less than the last continuous flow heater that this replaced we also splurged and had the controllers installed one general and one bathroom it is a real luxury to have a shower and not have to mix the hot water, we have a small house and while showering if another hot or cold tap is turned on there is no difference in the shower temperature just a bit less flow

Bought a brand new house and moved in 4 weeks ago and the builder installed the 16 unit per the developer. The hot water seems to come through quicker in the shower but the basic vanity tap seems to take ages and wastes a lot of water. This is also the case in my kitchen - not happy as want instant hot water and no wastage of water.

We installed an infinity 16 in our motorhome so it gets shaken and bashed as well as dust, salt air and very extreme heat and cold.
It's still working like the day we installed it over 13 years ago. The deluxe controllers give is the power to save water as well when living on a water tank.
Not to mention we have many children on board so it's made our travel life so much more comfortable. We wouldn't recommend anything else and if it ever fails we'll be buying another Rinnai.

Fantastic
Ihave a B16, not an infinity 16- not sure of the difference, but its always hot and the pressure is always there. Not had a problem with mine.
Its actually hotter than the last heater which was a 20 year old Bosch, plumber recommend Rinnai, even though it was a bit more cost than the Bosch

After owning a Bosch hydro unit for 20+ years (amazingly reliable) it was time to get a new water heater because we were at most, getting only very warm (not hot water) and with winter on the way, we needed to act fast. We chose the Rinnai Infinity 16. We walked into Gas Works on a Monday, bought the unit (it came with the Universal Controller) and it was installed (by plumber and electrician) the very next day. Love the controller... we set our preferred temperature and just turn on the hot water tap and we get continuous hot water at that temperature, with no need to turn on the cold water tap to fiddle around trying to get the right temp. Love it! Hopefully, it will prove to be reliable.

I have had electric water all my life and never had a problem. I changed to gas water because of a promotion and was told that the gas hot water is cheaper to run and the water temp is good. I have had the Rinnai hot just over two years and I'm am so not happy. The hot water takes so long to heat up and the temp fluctuates. I had rang Rinnai and got me to reset the water unit and nothing happen. they told me it's $132 and then $33 after 15 minutes, what a joke. I'm going to have the unit ripped out and put an electric water back.

Had an instantaneous unit for 35 years, then it died. Read all the negative stuff about all alternatives and was very nervous. I have a 3/8th inch long gas-pipe and gravity feed low-pressure tank water supply. The Rinnai 16 worked straight away, without a problem. It's even better than the old unit because it has a thermostat and no pilot light. Always the same temperature that won't burn the grandkids, but is hot enough for the dishes. Cost $260 for the gas fitter/plumber. Couldn't be happier, as long as it lasts for quite a few years yet.

We had this model installed in March 2015 to service our ensuite which is at the far end of the house from the electric system and it took too long for hot water to reach it. We find that it is marginally improved in the shower but little different in the basin, and for this slight improvement it was simply a waste of money. Contacting the ACTEWAGL shop did not prove helpful.

Terrible smell of gas gets pushed out.from.the vent. Doesnt feel hot enough to wash dishes not hot enough to remove grease and goes hot n cold all the time when showering. B16. Worst one put in government housing. Must be cheap. No pilot light to save gas money but how much power is used running it. False economy!