89 11/6/2018
© 2015 Rinnai America Corporation
PROPRIETARY and CONFIDENTIAL
Enhancing Lives By Changing The Way Water Is Heated
Gas Supply - Troubleshooting
Issues caused by insufficient gas supply:
- Poor appliance operation
- Error code 10, 11 and 12’s.
- Rumbling noises due to insufficient air/gas mixture (this will also occur with
incorrect venting)
- Installation may operate correctly until winter, then furnace kicks on and gas demand
increases. Now gas system is determined to be undersized due to not taking into account
gas load at full capacity.
- If symptoms exist suggesting a gas supply issue as mentioned above you will need a gas
manometer to verify the incoming gas pressure. Various manometers are available for
testing gas pressure, see two examples below.
U-tube or Slack tube
manometers
Digital manometers
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