Rinnai Mirai 24 - User Manual

Questions and Answers

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Sarah CainAug 18, 2025
Why is there no hot water from my Rinnai Mirai 24 Boiler?
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  brooke66Aug 18, 2025
  To troubleshoot why your Rinnai Boiler isn't producing hot water: 1. Ensure the DHW mode is activated by pressing the DHW mode button. 2. Check that there is a water supply to the boiler; wait for the water supply to return or open the water supply valve. 3. If the water pressure is too low (less than 2.3L per minute), DHW mode may not activate; consider installing a pressure device. 4. Ensure the water supply valve is sufficiently open to reach at least 2.3L per minute. 5. The water supply valve for cold water may be too opened.
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Donald IngramAug 20, 2025
How to increase heat on Rinnai Mirai 24 Boiler?
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  Danielle EdwardsAug 20, 2025
  If your Rinnai Boiler isn't heating the room sufficiently: 1. Make sure the CH mode is on by pressing the CH mode button. 2. Increase the set heating temperature. 3. Adjust or cancel any reservation or outgoing modes. 4. Note that CH mode does not operate while hot water is being used. 5. Ensure the room heating valve of the allotter is open. 6. Adjust the heating temperature for each room using the remote controller. 7. Clean the CH return filter. 8. Remove any air from the pipes by opening the manual air drain point on the upper side of the allotter.
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Karen HardingAug 22, 2025
What to do if Rinnai Boiler hot water is not hot enough?
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  Terrence PhillipsAug 23, 2025
  If the hot water from your Rinnai Boiler is not hot enough: 1. Increase the hot water temperature setting. 2. Be aware that using hot water in multiple places simultaneously can reduce the water volume. 3. Adjust the amount of cold water being mixed in.
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Logan StephensonAug 25, 2025
How to fix complete frozen detection on Rinnai Boiler?
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  alice18Aug 26, 2025
  To address complete frozen detection in your Rinnai Boiler, defrost it using CH apparatus, and then exchange any damaged components. If there is a leakage due to damaged components, contact Rinnai service.
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vkingAug 27, 2025
What to do if I smell gas from my Rinnai Mirai 24?
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  jonathan49Aug 27, 2025
  If you smell gas, immediately stop the Rinnai Boiler and gas supply. Open all windows and doors to ventilate the area. Do not attempt to light any appliances, as this could cause an explosion. Contact your gas supplier for assistance. Regularly check your gas valve with soap bubbles to ensure there are no gas leaks.
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Jennifer MartinezAug 30, 2025
How to fix ignition failure in Rinnai Mirai 24?
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  Joshua GomezAug 30, 2025
  To address ignition failure in your Rinnai Boiler: 1. Ensure the boiler is plugged into an outlet with the correct voltage. 2. Verify that the set temperature is higher than the current temperature. 3. If '[11]' is displayed, turn the boiler off and on again. If the issue persists, contact Rinnai service. 4. Confirm the gas supply valve is open.
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emorrisSep 1, 2025
What to do if Rinnai Mirai 24 shows safety circuit malfunction?
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  Christine PaceSep 2, 2025
  If you suspect a safety circuit, temperature fuse, or overheating protection device malfunction in your Rinnai Boiler, stop the boiler for 30 minutes. Then, press the CH mode or DHW mode button. If the issue continues, contact Rinnai service for assistance.
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Frank PearsonSep 4, 2025
Why is there improper water circulation in my Rinnai Mirai 24?
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  William BensonSep 4, 2025
  If you suspect improper water circulation in your Rinnai Boiler, check the water supply and ensure that the CH/DHW pipes are not frozen. If air might not be removed sufficiently, unplug the boiler, plug it back in, and start the test operation.
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Debbie RamosSep 7, 2025
How do I troubleshoot ignition failure on my Rinnai Boiler?
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  angela23Sep 7, 2025
  To resolve ignition failure in your Rinnai Boiler, first, ensure that the gas shut-off valve is open. Then, turn off the CH mode and turn it on again. If misfire is the cause, check the gas supply pressure by turning on other gas appliances and contact your gas supplier if needed.
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David LewisSep 9, 2025
What to do if I smell exhaust gas from Rinnai Mirai 24?
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  Jason ShortSep 9, 2025
  If you smell exhaust gas from your Rinnai Boiler, stop the boiler immediately. Contact Rinnai service for maintenance, as the air inlet/exhaust pipe may not be connected or bent, or the air inlet/exhaust may be blocked.