Having reliable Rinnai products in the past I thought I would fork out the money for the best efficient hot water system Rinnai offered. I purchased the Sunmaster with the evacuated tubes and instant gas booster. Boy was this a mistake..

The Bad - The system had issues from the day it was installed. Day 1- The first issue was the temperature sensor on the evacuated tube manifold was faulty. The sensor was indicating a high temperature all the time causing the circulating pump to run 24 hours a day. Day 35 - circulating pump started making...Read more

We built a house and moved in November 2016 with this unit being installed brand new shortly after. Since then the Rinnai Sunmaster (Model: REU-VR1620WS-AK) has been in gradual decline. We first noticed the water starting to take longer and longer to heat up, then the water temperature started to decrease. Next we had an issue with an overflow valve which resulted in the constant flow of water. This was eventually fixed as it is a known fault but it took a couple of calls for them to acknowledge this and more wasted water which resulted in a ri...Read more

Built new house in 2013 and installed rinnai evacuated tube solar hot water system, the system is 6.5 years old and the hot water cylinder has let go, it is leaking and has massive calcium build up inside, my plumber says don't worry warranty will cover, rinnai informs us it's not under warranty as older than 5 years, they basically said bad luck buy a new one, they have longer warrantys now, i got no where with them, they tried to blame our tank water which is not right, we previously lived 2 k's away in same street and had rheem cylinder in...Read more

initial unit,off peak electric boosted floor mounted 315 L tank with 25 evacuated tube solar collector installed before Christmas 2016,
Household of 4 adults,Port Pirie SA ,where the sun signs almost everyday,most days with careful shower timing can get 4 showers but add a visitor to stay or for lunch and usually run out of hot water and need to turn daylight electric boost on
never performed very well and had continuing list of problems,pumps,sensors,etc and eventually tank and some tubes replaced March 2019,
since then have complained about ...Read more

My hot water woke up the neighborhood by making a high pitched whine / scream at 4 am. I used the pressure relief valve. The noise stopped. I let go and it returned. So i turned off the whole unit.
I ring rinnai. The first person will not accept my word that i have been in my house a bit over 12 months and the serial number first 4 digits of the serial number mean the unit was now over 2 years old. I needed the certificate of occupancy to show when i got the new house.
I rang back with certificate in hand. After 18 minutes on hold the woman sai...Read more

I purchased this system in September 2017. Since then I have had one tube failure and multiple problems with the pump and control system. The pump is supposed to circulate water from the storage tank through the roof evacuated tube collector when the water in the collector is warmer than the storage tank. Unfortunately the pump often runs all night cooling the hot water in the storage tank.
The controller has been replaced a number of times but the problem keeps recurring. Rinnai have been of no significant help other than in the early days of ...Read more

It seems the company RINNAI has the policy of pushing their products hook and crook through the builders rather than delivering quality product that withstand changing weather conditions. More worse is their attitude on customer service. My solar hot water flat panel has burst this morning and despite several calls to 1300555545 the person is not registering the fault and does not provide reference number, simply saying that some would call me back. I am stuck now without hot water. It was a similar problem last year, ten days after booking...Read more

I have a Rinnai Solar Hot Water Panel unit installed for less than 2 years by my builder on my newly built home. Recently I found out that the Flat Plat on the roof has a small leak that causes my water bill to soar. Since the unit is supposedly still under warranty, I called up the service center to book a service and had one of the worst customer service call response I've ever had:
1. Waiting period of around 45 minutes
2. The customer service personnel can't really advise on whether the unit is still under warranty or not even when I offe...Read more

Our Rinnai Hot water units with solar panels have major water leaks from the solar panels after being installed a few months ago in our new house. There is no hot water until the problem can be fixed. The problem started with just condensation inside the panel. The Rinnai technician investigated this about 3 weeks ago and said we should wait until the summer to see if the condensation goes away. Today the panels started gushing water onto the roof on 2 of the new houses just build and occupied only 3 weeks ago. When I read the reviews today, i...Read more

System has a frost protection value that has been leaking at ~12 deg. Service call placed, technician visited, said they needed to order a replacement part. Technician assistant then called afterwards to say Rinnai rejected the change and that we were liable for the visit. Called Rinnai to understand technical operating limits for the frost valve, told they could not help me due to computer issues, got put through to their technical department and asked where I could reference the information, was told it should start operating a 4deg and th...Read more