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Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 475
Experience:  Owner at Gaztech
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Have a rinnai inbuilt gas fireplace giving us an error 12

Customer Question

have a rinnai inbuilt gas fireplace giving us an error 12 after starting. fire stats and runs for 5-20 secs then switches off with an error 12 displayed
Submitted: 1 year ago.
Category: HVAC
Customer: replied 1 year ago.
Model is IB35ETR connected to mains pressure Natural Gas
Expert:  Gaztech replied 1 year ago.

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Expert:  Gaztech replied 1 year ago.

Have you noticed ABNORMAL FLAME PATTERN upon startup like flame lifting and clouding up then blow out completely ?

I flame looks normal and it just shuts down...?

The issue is caused by the Flame rods. Near the 2 pilots at the front and the back. Those small rods each that 'senses' the flame become inadequate, so they need to be replaced with a new pilot assembly from Rinnai that has longer rods and better coverage.

Contact your Rinnai dealer for details for replacement parts.

Customer: replied 1 year ago.
have dismantled the fireplace, cleaned and checked the flame rods with a multimeter, these are functioning fine. found plenty of carbon buildup on both front and rear pilot flame jets. once these were both cleaned, pilot flame around double previous height and fireplace is now functioning correctly.
Expert:  Gaztech replied 1 year ago.

Good Job.

Have a nice summer.

Best regards