Rinnai Sunmaster Range

High pitched squealing noise from frost valves last 90 secs & goes off every few minutes, and runs all night (3 nights so far). You can not sleep with this product. If you happen to doze off it wakes you right back up again. Worst product I have ever had. Rinnai service centre told us Thursday they would call Friday and didn’t. They didn’t care we couldn’t sleep. They are now shut weekends so we can’t follow up until Monday. Hot water is very slow to run - that was just tolerable with water wastage issues. Now with this valve noise issue it is a major fail. Don’t buy!

We’ve had the solar unit in for 8 months and the sacrificial anode has been replaced 3 times in the tank to try and combat the build up of pressure in the tank. To date this has not fixed the issue. We were told that we weren’t using enough hot water, so what happens when you go away for the weekend? The copper water pipes have changed colour due to the excessive heat and plastic around the solar return pipe has melted.
It seems that not enough research and development has gone into this product and we a paying the price for it.

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...

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...

Five years on the unit still does not work and Rinnai seem to have their heads in the sand. The problem appears to be in the sensors, and the PCB. Don’t waste your money!!

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...

Failed after 4.5yrs. Rusted at outlet. Replaced under warranty at cost of >$400. Second unit rusted at inlet &failed 4.5yrs later. Rinnai contacted on 3 occasions but totally unhelpful - not interested. Not a water supply issue. Awful & expensive experience.

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 ...

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...

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 ...

This is merely six years old and the tank is bulging and the external plastic has completely broken away. After 2 and a half weeks I cannot even get someone to look at it. Four calls to Rinnai "service" did not get thru. This company is extremely low on customer focus so we would not recommend anything with a Rinnai brand at all based on what happens when you call for help.

My unit has now failed for the 9th time in 3 1/2 years. The problem seems to be in the design or manufacture of the pump control system. As a result at night the pumps moves the hot water from the tank and cools it down on the roof. Rinnai are totally unhelpful. The ad hoc solution has been to put a timer in the power supply to the pump so it cannot run at night. To make matters worse the problem is intermittent.

18 Month old system was installed on new home and is on 3rd warranty call out. Frost valves leak & have been replaced twice, last set have not lasted 8 months. Pump failed tripping the circuit breaker shutting down all hot water supply in a drizzly cold Victorian evening in July and required our 6 month old daughter to be driven to friends house for several days for bathing until Rinnai sent out a technician to replace.

Requested support from Rinnai on full replacement system however pushed back onto technician suggesting they will provide a solution. Next step ACCC to request full replacement.

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...

Well our second Solar Hot water panel has now started leaking just out of the 7 years warrant by 5 months, the first one started leaking in 2015 and was replaced under warranty. Now just after 3 years the replacement panel is now leaking water from the inside again onto the roof.
The system is a Sunmaster by Rinnai with two solar hot water panels on the roof with the Rinnai continuous flow gas boost, the system is not designed for the intended purpose.

A very poor product that should last more than 3 years without fail, I have been quoted $930 for a replacement panel without any labour. This should be still covered under warranty.