i120

  1. S

    Rinnai i120c combi boiler losing pressure (error code 430)

    I have a Rinnai i120c that is losing pressure from about 22 psi to 6-8 PSI after about an hour of running. While it runs, the internal gauge shows about 29 PSI (external around 22 PSI) but the condenser emits around 1/4 cup of water during the run. I'm only running CH at the moment. Any ideas of...
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