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Rinnai Error Code 31

What is a Rinnai Error Code 31?

You may be wondering what Rinnai error code 31 means. Metropolitan Plumbing is your local Rinnai expert. We can help solve a range of Rinnai error codes including Rinnai error code 31.

An error 31 code on your Rinnai hot water system indicates that there is a fault occurring with the burner thermocouple on your unit. The thermocouple is an electric device that acts as a sensor used to monitor the water temperature within your hot water unit. Having a functioning thermocouple device is essential for your Rinnai hot water system to operate effectively.

The purpose of the burner thermocouple is to prevent explosions and the dangerous release of natural gas. If there is a fault in relation to the burner thermocouple your hot water pilot light may not light at all or the burner won’t stay lit, which will result in no hot water for you.

Rinnai Error Code 31 Repairs

Diagnosing and fixing a thermocouple issue on your hot water unit is not an easy task, however, there a few basic troubleshooting steps you can follow to attempt to fix you thermocouple issues on your own.

Firstly, the fire manifold pressure settings need to be checked to ensure they are set at the appropriate levels for your unit. Secondly, check that all of the dip switches are set in the correct position on the unit’s PC board. Finally, you will need to check the milli-volt (mV) reading on the thermocouple to ensure it is in the appropriate range.

Often if the reading is below 8mV on the thermocouple, this indicates that there is low gas pressure leading to the thermocouple. This will require a qualified technician in order to be repaired.

At Metropolitan Plumbing, our plumbing professionals understand all Rinnai fault codes and how to quickly provide a resolution for the issues at an affordable cost to you, with quality workmanship guaranteed.

When it comes to a Rinnai error code 31, your attending plumber from Metropolitan will check the fire manifold and gas pressures of your tankless hot water heater. The dip switches will be verified for proper position settings.

If all seems to be incorrect order, the next step will be to replace the burner thermocouple which will rectify the code 31.

Quality Plumbing for Rinnai Hot Water Heater Issues

When you have any problem with your hot water heater call in an expert from Metropolitan Plumbing. We have a local plumber available every day of the year, every hour of the day.

In a gas or plumbing emergency, such as no hot water, we can have a plumber pulling into your driveway within an hour* of your booking.

For all Rinnai hot water heater repairs, replacements or new installations, call the hot water specialists from Metropolitan Plumbing for a fast, reliable, professional and fuss-free service. Or book your plumber online via our convenient online booking form and we’ll call you back at no cost to you.

With Metropolitan Plumbing you will always get the best service possible, including:

  • 24/7 availability
  • Service within an hour*
  • Fully qualified and licensed plumbers
  • 12-month warranty
  • Interest free** payment options
  • Fully stocked van
  • $20 million public liability insurance
  • More than 25 years’ experience

With Metropolitan Plumbing you’ll never be without hot water for long with our same day service guarantee, or within the hour* in a plumbing emergency.

You’ll be happy to know we also offer a range of interest free** payment terms for eligible customers on all our jobs, big or small. Your plumber can take you through the simple application process and approval usually takes only a few minutes.

You can select a payment plan with one of our providers – Zip or Humm – and then enjoy the convenience of making weekly, fortnightly or monthly instalments, depending on your choice of plan. Some plans even accept a $0 deposit, which means you pay nothing upfront.

We also accept payment by cash, cheque, direct transfer and credit card (Visa, Mastercard or American Express).

Contact us today for more information on the Rinnai fault code 31 or to book.

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What Our Happy Customers Have to Say

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Metropolitan Plumbing are proud winners of 2021 and 2020 Product Review awards in the plumbing category. These awards highlight our dedication to outstanding customer service. Product Review provides a platform for real-life experiences. Check out some of our customers' reviews below:
5 stars rating

Dave.C was very friendly and professional especially for a Sunday. He was able to identify the cause of the leaky shower head, and provide two quotes. He was also able to show what the issue was and was able to advise what he had done to fix it. Thank you.

Tyrell Tongz - QLD
5 stars rating

They replaced our old, malfunctioning toilet. The installation was quick, and they checked for any leaks thoroughly. Reliable service we can count on!

Anna Cunning - QLD
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I had a toilet that wouldn’t stop running, and it was wasting so much water. They arrived promptly, diagnosed the issue, and replaced the faulty parts. Now my toilet works perfectly. Great service and reasonable rates.

Caity Waters - QLD
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