# Rinnai Central

> Connects Rinnai tankless water heaters for owners and installers. (iPhone/iPad app by Rinnai America Corp.)

- Source: https://appshunter.io/ios/app/rinnai-central/id6444321202 (this page in markdown: same URL + `.md`)
- Developer: [Rinnai America Corp](https://appshunter.io/developer/1045235922)
- Category: Utilities
- Price: Free
- Rating: 1.60/5 from 341 App Store ratings · 170 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.4.1 · 79 MB
- Languages: American English
- Released: 2023-06-08
- Data updated: 2026-08-27
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rinnai-central/id6444321202/reviews.md

## What is Rinnai Central?

Rinnai Central helps professionals support customers and gives homeowners convenient control of compatible Rinnai water heating systems from anywhere.

For Rinnai PROs and installers, Rinnai Central makes it easier to register products, set up compatible customer devices, access service tools, and stay connected to Rinnai resources.

For Rinnai tankless water heater owners, Rinnai Central provides convenient access to temperature control, recirculation settings, scheduling, system status, and maintenance alerts when supported by the connected product.

PROFESSIONALS
Use Rinnai Central to:
∙ Set parameters and perform service on compatible Rinnai tankless water heaters and boilers.
∙ Register eligible Rinnai products after installation.
∙ Set up and configure compatible customer Wi-Fi modules.
∙ Access product documentation, troubleshooting tools, training, rebates, news, and service resources.
∙ Find the right Rinnai product for your customer's needs.
∙ Access the Rinnai parts webstore.
∙ Manage your professional account and company relationship.
∙ Participate in eligible Rinnai PRO Tech programs when available.

HOMEOWNERS
Use Rinnai Central to:
∙ Adjust compatible water heating system temperature settings.
∙ Activate recirculation when supported by the product.
∙ Create daily schedules so hot water is ready when needed.
∙ Set vacation mode to help save energy when hot water is not needed.
∙ View real-time system status and maintenance alerts.
∙ Find experienced Rinnai PROs and installers near you.

COMPATIBLE PRODUCTS
Rinnai Central supports select Rinnai residential and commercial tankless water heaters and compatible accessories. Some features require a supported Rinnai Wi-Fi module or compatible connected product. Product availability, supported features, and access permissions may vary by model.

- BLE setup is not available on all Rinnai products. Some products may require the RWM200 Wi-Fi Module accessory, sold separately.

- For safety and product support reasons, some device setup and service permissions may be restricted to Rinnai professionals.

Read our Data Use and Privacy Policy, Terms, and other important information in the legal section of our App Store description or at the web addresses below.

TERMS OF SERVICE
https://www.rinnai.us/terms-of-use

PRIVACY POLICY
https://www.rinnai.us/privacy-policy

## Key features

- Adjust water temperature
- Schedule hot water
- Activate recirculation
- Register appliances
- Perform remote service
- Access documentation
- Order replacement parts

## What do users think of Rinnai Central?

Overall sentiment: negative

**Pros**

- 🚀 Works great
- 🚀 Much improved
- 🚀 Fantastic
- 🚀 Working perfectly now

**Cons**

- 🐛 Doesn't work at all
- 🐛 Bug in 4.3.0
- 🐛 Awful. Just terrible
- 🐛 Lousy App
- 🐛 Rinnai does not care
- 🐛 Horrible app
- 🐛 Worst app
- 🐛 Horrible
- 🐛 Terrible app
- 🐛 Total fail
- 🐛 Crashes on launch
- 🐛 Cannot connect to Bluetooth!
- 🐛 Very Disappointing
- 🐛 Bluetooth option??
- 🐛 Broken
- 🐛 Not good
- 🐛 Defective app
- 🐛 App does not work
- 🐛 Useless APP
- 🐛 The application does not work.
- 🐛 Unimpressed
- 🐛 IT DOESN'T WORK
- 🐛 Absolute junk. Don't buy Rinnai
- 🐛 Renders water heater useless
- 🐛 Written by a company that cares more about advertising than functionality
- 🐛 Won't connect.
- 🐛 Can't even create an account
- 🐛 App is useless
- 🐛 Use the reset button!
- 🐛 Buggy registration
- 🐛 Doesn't work
- 🐛 Worthless w/o Module 200
- 🐛 Worst. App. Ever.
- 🐛 Pain to troubleshoot
- 🐛 Poor
- 🐛 Cannot create account even
- 🐛 Does Not know
- 🐛 Frequently isnt in sync
- 🐛 Doesn't work
- 🐛 Worthless
- 🐛 Mostly Broken, Hasn't Worked for Days
- 🐛 Doesn't work for new models
- 🐛 Garbage app
- 🐛 Terrible
- 🐛 Junk
- 🐛 Pain to troubleshoot
- 🐛 Poor
- 🐛 Barely works
- 🐛 Where's the beef?
- 🐛 Have to buy a device to use
- 🐛 App does not y
- 🐛 Rarely stays connected
- 🐛 Crap
- 🐛 Recirculation doesn't work after latest update
- 🐛 I can't get it to work with voiceover
- 🐛 None of these apps have world
- 🐛 Absolutely garbage
- 🐛 Doesn't load on 26.1 right now

**Commonly reported bugs**

- Control failed is still happening in latest version
- Login screen freezes
- Incompatible with older devices

**Most requested features**

- Add device through Bluetooth missing
- Dark mode option
- Advanced analytics dashboard

## Recent user reviews (10 of 170)

All indexed reviews: https://appshunter.io/ios/app/rinnai-central/id6444321202/reviews.md

### 1/5 — You have to register as a pro to connect to Bluetooth

*2026-06-05*

I’m not sure how this oversight occurred but to be able to actually connect to a tankless water heater that has Bluetooth, you must create a professional account and tell the app that you install water heaters otherwise if you register as a consumer, you will NOT see the option to connect to Bluetooth. Also you cannot control the settings of the water heater unless you go through a “quick setup” each time and the app says the warranty can be voided if you don’t give it the “correct information” whatever that means. I cannot believe the lack of usability of this app. You might as well not have it.

### 5/5 — Finally seems fixed

*2026-05-24*

After a year of fighting connectivity issues with this app, it finally seems like they may have finally fixed it.   It’s been working for a while now. Whoever has been working on all of the recent app updates, it’s very much appreciated

### 1/5 — Laughably terrible

*2026-05-16, version 5.0.1*

This is a absolutely terrible app.  After spending $100 for the wifi module i am shocked at how terrible this is. The metrics it gives you are delayed to the point of uselessness.  I wont buy another Rinnai thats for sure.

### 1/5 — Fix your garbage app

*2026-05-06, version 5.0.1*

Zero. Worst app and customer service ever. Avoid at all costs if considering a tankless water heater.

### 1/5 — The app doesn’t connect

*2026-05-05, version 5.0.1*

Horrible, it doesn’t work. I’ve tried repeatedly to use the serial number and registered the product but it continues. He says it’s an invalid serial number.

### 1/5 — I don’t care to have notifications

*2026-05-04, version 5.0.1*

Quit trying to force me into adding notifications to the stupid app

### 4/5 — Easy upgrade, mostly good UI improvements, but… (updated 5/3/26, see bottom)

*2026-05-03, version 5.0.1*

I discovered this new app and installed it. Upon logging in to the account originally created for Control*R, Rinnai Central immediately found my two water heaters, downloaded the schedules with complete accuracy, and noted the fact that one was in vacation mode. Excellent upgrade behavior! The UI is pretty easy to use and straightforward, although there are some useless advertisements and promotions on the homepage. My issues are: 1) The manual recirculation still does not work, in fact, it seems to be even worse than the Control*R 2.0 app after it degraded to 5 minutes max. 2) Options for manual recirculation are very coarse. It jumps from two hours to four hours, but I really need closer to 2 1/2 hours to run the dishwasher. The UI is easier than Control*R, but functionality has decreased. 3) This is a quibble, but after losing granular control for manual recirculation, the app provides up to the exact minute settings for schedules. This is awkward to use, and, at least for me, offers minimal value over the 15 minute increments on Control*R. Why wouldn't 5 minute intervals be adequate? The interface would be much easier to use! Overall a good step forward, and I anxiously await the fix for manual recirculation! Update 9/12/23: I downloaded the new version that was supposed to fix the instant recirculation feature. I stood next to the heater and started instant recirc … nothing happened. I started it using the old ControlR app and it started. NOT FIXED!!  Update 11/19/23. Downloaded version 3.1.4(4) and still cannot control manual recirculation!  STILL NOT FIXED!!
Update 3/2/26: the server was down over the weekend and couldn’t login or control the Rinnai. Before I called for support this morning I tried once again on both Rinnai Central and Control-R. They both worked. Far more importantly, both recirc now and get status worked on Rinnai Central for the very first time!!!!!  Maybe there’s hope for the flower after all. Give it a try again and report back here so we all can know.
Update 5/1/26: Major visual design changes on version 5 home screen.  (Following statement not true, see update below—Return to home screen after selecting from more than one heater is not simple as before, requires accessing menu then selecting personal account.) Lost a star from my rating.
Update 5/3/26: discovered a black on black left arrow in the upper left corner on a heater’s page. It returns you to the main home page. Putting the star back.

### 1/5 — Keeps asking to accept notifications

*2026-05-03, version 5.0.1*

Before I can use the app, it asks to turn on notifications even though I have selected no notifications. It is an extra step for an app that already has extra steps, just to use the circulate option.

### 1/5 — New Version 5.01 - Just as Broken

*2026-05-02, version 5.0.1*

You do get a confirmation from the app when firmware successfully updates - I think that’s new. Of course, you have no idea whether the new firmware is any different than the old firmware because the version isn’t reported (seems just as fragile, but this is Rinnai). Otherwise, nothing else seems different. Same unwavering commitment to maximizing the amount of cold water poured down the drain.

### 1/5 — Doesn’t work

*2026-04-30, version 5.0.1*

You have to enter a bunch of personal information to use this to run a device you already own, then it won’t connect so it doesn’t matter. (But they already have your info.)

## Frequently asked questions about Rinnai Central

### What does the Rinnai Central app do?

The Rinnai Central app serves two main purposes. For Rinnai Tankless Owners, it allows them to connect to their water heater to manage temperature, schedule hot water, activate recirculation, and view status. For PROs/Installers, it provides tools for registering appliances, performing service, accessing documentation, ordering parts, and finding rebates.

### What features are available for Rinnai Tankless Owners?

Rinnai Tankless Owners can use the app to adjust their water heating system temperature, quickly activate recirculation if applicable, set customizable daily schedules for hot water, and put the system in vacation mode. They can also view real-time status and receive maintenance alerts.

### What tools does the Rinnai Central app offer for professional installers?

Professional installers can use the app to set parameters and perform service on specific Rinnai tankless water heaters and boilers. They can remotely register products, set up customer Wi-Fi modules, access the latest documentation and online training, order parts from the Rinnai webstore, and use a troubleshooting guide and solution selector.

### What Rinnai products are compatible with this app?

The app is compatible with Rinnai Residential and Commercial Tankless Water Heaters from 2006 models and newer, provided they have Rinnai’s Wireless Module installed, which is sold separately. Some exceptions may apply, and users should consult their User Manual for details.

### Is the Rinnai Central app free to use?

Yes, the Rinnai Central app is available for free download and use. There are no in-app purchases or advertisements mentioned in the provided description.

## Version history (last 5 releases)

### 5.0.4 — 2026-07-08

Bug fixes and stability improvements to help make Rinnai Central more reliable for both professionals and homeowners.

### 5.0.3 — 2026-06-10

Bug fixes and stability improvements to help make Rinnai Central more reliable for both professionals and homeowners.

### 5.0.2 — 2026-05-21

Bug fixes and stability improvements to help make Rinnai Central more reliable for both professionals and homeowners.

### 5.0.1 — 2026-04-29

Bug Fixes
∙ Improved app update handling so users receive the latest version from the App Store.
∙ Clearer error messages instead of the generic "Control Failed" message.
∙ Improved recirculation scheduling to help prevent app freezes.
∙ Smoother registration, login, and account verification.
∙ More reliable BLE and Wi-Fi connectivity, including device discovery.
∙ Fixed email entry to support a wider range of special characters.

Enhancements
∙ Heater profiles now retain data more reliably after app upgrades.
∙ Professional account improvements:
   - Establish or update a company relationship using a unique company ID or postal code lookup.
   - Automatic enrollment for eligible Rinnai PRO Tech users with a Professional account.
∙ New in-app messaging for rebates, news, product updates, and more.

Future Roadmap
∙ PRO Tech status block remains visible after opting out.
∙ Continued improvements to scheduling parameters.
∙ RWM200 integration with Google Home and Amazon Alexa.

Notes
∙ Professional users: heater profile installation data may be removed from within the mobile app.
∙ SmartCirc™ units: a power outage may reset the recirculation schedule. Enable "First 24 Hours" to relearn your schedule.
∙ Wi-Fi Module units: schedule parameters save to the cloud and restore after a power outage.
∙ BLE is not available on all Rinnai products. RWM200 Wi-Fi Module sold separately.
∙ Homeowners cannot connect to heaters via BLE for safety reasons. Contact your local Rinnai PRO.

### 5.0.0 — 2026-04-29

New Rinnai release with performance improvements, bug fixes, and updates to help Pros and homeowners stay connected, set up compatible equipment, and manage water heating systems more reliably.

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## More apps by Rinnai America Corp

- [Rinnai Control-r 2.0™](https://appshunter.io/ios/app/rinnai-control-r-20/id1180734911)
- [Rinnai Pro](https://appshunter.io/ios/app/rinnai-pro/id1461284046)
- [Rinnai Pro 2.0](https://appshunter.io/ios/app/rinnai-pro-20/id1536483096)

All apps by Rinnai America Corp: https://appshunter.io/developer/1045235922

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*