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Rinnai Error Code 73

What is a Rinnai Fault Code 73?

The Rinnai error code 73 signifies that there is a fault in relation to the burner thermocouple of the hot water unit. The burner thermocouple is like a sensor that sends a signal to the gas valve to allow the gas valve to let gas through to the burner. If the burner thermocouple begins to fail the wrong signals will be sent to the gas valve resulting in the burner, not lighting, meaning no hot water for you.

Rinnai Error Code Troubleshooting

When it comes to troubleshooting the Rinnai fault code 73 your attending plumber from Jim’s will inspect the wiring harness of your continuous flow hot water heater to ensure there are no loose or damaged connections from the burner thermocouple back to the PC board.

They will ensure all dip settings are set correctly and check that the manifold gas pressures are set as per manufacturer’s instructions. In most instances, the burner thermocouple will need to be replaced if it has become faulty. If the thermocouple is replaced and the Rinnai error code 73 remains then the PC board will be required to be replaced also.

Although a service call is required to rectify a Rinnai error code 73 you can attempt to remove the code yourself by turning your hot water tap off and then on and by pushing the on/off button on the systems monitor off and then on. If the fault code was just a trip of the system it should now be removed. However, if the fault code 73 remains, or shows up again shortly after, then call the experts from Jim’s Plumbing for a fast, reliable and affordable repair first time, every time!

Rinnai Error Code 73 Repair

When it comes to rectifying a Rinnai error code 73 on your continuous flow hot water heater you will require the services of a fully qualified technician. For a prompt and reliable repair in relation to the burner, thermocouple fault call the Rinnai hot water experts from Jim’s Plumbing. We have a team of highly experienced and fully qualified hot water plumbers available round the clock, for comprehensive service every day of the year, even public holidays.

If you find yourself with no hot water and a Rinnai fault code 73 flashing on your hot water system monitor we guarantee a same day service. We can also have a plumber to your location within the hour* in a gas or plumbing emergency. With Jim’s Plumbing, you’re always getting:

  • 24/7 availability
  • Service within an hour*
  • Fully qualified and licensed plumbers
  • 12 month warranty
  • $0 deposit, interest free options**
  • Fully stocked van
  • $20 million public liability insurance
  • Over 15 years’ experience

You’ll be happy to know we also offer $0 deposit, interest free terms** on all our jobs, big or small. There’s no deposit and no interest at all. Enquire with your plumber on site for more information or to sign up.

Contact Jim’s Plumbing for a Rinnai error code service today.

1300 133 509


Comments & Testimonials

What people are saying about us

Friendly Dean from Jim's

Dean was punctual and professional and he sorted out our plumbing emergency ASAP. Highly recommend him. Super friendly and helpful, easy to talk to. Very efficient when fixing the issue.
Katherine, WA 5 stars rating

Excellent Service

Quick turnaround, trustworthy staff. They gave a better option than we otherwise would have had and helped us on a wet Saturday night. Would definitely recommend Jim's. Ronnie was very helpful.
Alister, VIC 5 stars rating

Leaky Toilet

I rang Jim's Plumbing about midday and they had a van out very fast. Friendly service by Andrew. We had issues with our leaky toilet and he fixed it the same afternoon. Very happy with his service!
Peter, SA 5 stars rating
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