Rinnai Hot Water Troubleshooting with No Temperature Controllers Installed

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Rinnai Continuous Flow Hot Water Heater Troubleshooting Guide with No Temperature Controllers Installed

Rinnai continuous flow hot water heaters can be installed in with an optional temperature water remote controller.

rinnai hot water system

The hot water temperature controller is a handy and convenient feature which allows you to pre-set your desired hot water temperature within different areas of your home.

This eliminates the need of constantly fiddling with your hot and cold taps to reach your preferred water temperature and keep it consistent. Another feature of the Rinnai hot water temperature controllers is that they provide a handy self-diagnostic tool should there be a fault with your Rinnai tankless hot water heater. A Rinnai error code will flash on the controller’s digital monitor, allowing for prompt troubleshooting.

If you have a Rinnai continuous flow hot water heater that does not have a water temperature controller installed there are still steps you can take to try and troubleshoot any faults with the unit – even without a temperature controller showing precisely what the issue is.

Rinnai hot water heater troubleshooting

If you suddenly experience no hot water with your Rinnai continuous flow hot water system but don’t have a water temperature controller installed, there are some steps that you can try prior to calling in a technician;

Your Rinnai hot water heater won’t start

Check that the power is on at the hot water system. If so, then check that the isolation valves for the unit are open.

Your Rinnai hot water heater starts but then immediately shuts down

Check that the power to the unit didn’t cut out after operation.  Inspect the gas isolation valves to ensure that they are fully open at the unit and at the gas meter. Completely open your hot water tap.

The Rinnai hot water heater starts but then the water turns cold

Check that the unit’s power is still on. Open your hot water tap to a greater capacity.

When to call a hot water technician

If you try the above steps, according to the Rinnai hot water heater fault that you are experiencing, and the issue is not solved then you will need to call in a fully qualified technician for a repair.

If you reside in any metropolitan area of Adelaide, Melbourne, Perth, Sydney, Brisbane or Canberra then call the Rinnai hot water heater experts from Jim’s Plumbing.

At Jim’s Plumbing we have a team of fully qualified and highly trained plumbers available 24 hours a day, 7 days a week, ready and waiting to assist with any of your hot water heater issues.  In a plumbing emergency, such as no hot water, we strive to have a plumber to your door within an hour* of your call – no matter the time of the day or night, even on public holidays.

When you call us you can rest assured that your Rinnai hot water heater fault will be repaired in a prompt, professional and affordable manner.

Should a hot water heater replacement be required in the event that your Rinnai hot water system is beyond repair – don’t panic!

At Jim’s Plumbing we provide NO INTEREST EVER payment plans* to ease any financial burden and providing you with a stress-free service from start to finish.

Call us anytime on 1300 133 509, or book your plumber via our online booking form.

No Interest Ever!* Payment Plan Options Available

No Interest Ever!* payment plan options available on hot water heater replacements to help ease any financial stress this burden may cause. If your rinnai hot water heater is leaking, or you have no hot water, we can often have a plumber to you within the hour*.

Choosing the Correct Hot Water System

Choosing the correct hot water system can be difficult, as there are so many options to choose from; Click on the links to find out more about these systems.




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Please be advised that we may have additional Rinnai Hot Water System models available.

Simply book a plumber online now, or phone 1300 133 509 to book now.

*NO INTEREST EVER!* PAYMENT PLAN, “Fees, terms and conditions apply”.

No Interest Ever!* Payment Plan offered through Certegy Ezi-Pay Express. No Interest Ever on your hot water heater replacement or new supply and installation, gas service, water service or drain replacement. Conditions apply.

Information on this page is subject to change. Commercial hot water systems also available on enquiry.

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