Purchased model #N-0751M in 2008 and the heat exchanger leaked a couple of years later. They replaced it and it lasted for 5 years and is now leaking again but now they say they won't warranty it. I flush this system every 6 months but they say it has to be cause by build up. Very disappointed with this company.

Product is absolutely great – customer service, if you need it – and you will, is absolutely horrible – calls go to never – never land, wrong parts are shipped, calls and emails not returned, refunds are not processed – you name it and it is bad beyond belief.

After only 5 years our Noritz nr 71-sv tankless water heater is not working. Noritz agreed to replace only a new heat exchanger, not including labour charges. After our plumber spoke to Noritz rep, we were told that this model is the worst model Noritz ever made and that they don't make it anymore. Our plumber also noted that a replacement water heater is necessary due to all other components are wet and will fail. Repairs will be ongoing. Recommend complete replacement. Noritz needs to stand by their products and warranty stating that within 5 years, replacement will be made of all defective parts, including labour. Noritz only offered a 20% discount to purchase a new water heater.

Horrible, horrible unit. I've purchased a different hot water on demand unit in the past and forgot about it after installation. This Noritz unit, every part inside has been replaced only because the company wouldn't replace the whole unit. Then every winter we get error codes after error codes. And I've only had it for 5 years. It's either bad quality brand or it's not made for Canadian weather. Do not buy this brand!!

My husband purchased a Noritz combi water heater boiler to upgrade from our regular separate water heater and boiler. It was the wrong decision. The unit is only 3 months old and the motherboard control panel has been replaced twice. We live in the Northeast us and winters are very cold. Whenever the temp drops below 35 the unit shuts down with a different error code. I regret spending thousands of dollars of this unit and installation. The customer service wait is 30 mins minimum which is a red flag. The call volume must be high because of the poor quality products. After 30 minute or more wait the customer service reps and supervisors do not take responsibility for the obvious manufacturer defects.