Rinnai Hot Water Fault or Error Code 14

Rinnai Continuous Flow Hot Water Heater Fault or Error Code 14 Troubleshooting Guide

If you have a Rinnai Infinity continuous flow hot water heater installed and you find that the system fails to work and flashing on the digital or status monitor is a Rinnai fault code 14 this indicates a remaining flame safety device.

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The Rinnai hot water fault code 14 should be taken seriously and does warrant a service call as it is a sign that your hot water system is overheating.

There are two components within the continuous flow hot water heaters that could be the cause of a Rinnai error code 14; the bi-metal switch or the thermos-fuses.

Rinnai fault code 14 caused by the bi-metal switch:

The bi-metal safety switch is attached to the hot water units’ heat exchanger and if it is tripped it will more than likely reset itself once the hot water system has cooled down. Once the bi-metal switch resets itself the hot water system should begin to operate as normal once more. But it will soon trip again if the fault that originally caused the overheating has not been rectified.

Rinnai fault code 14 caused by the thermos-fuses:

The thermos-fuses on the Rinnai Infinity continuous flow hot water heater are wrapped around the systems heat exchanger. If these termo-fuses blow for any reason they will need to be replaced.

Replacing the termo-fuses requires removal of the heat exchanger and an inspection is required to be carried out to ensure the correct safety and operation of the unit.

Either of these above scenarios causing the Rinnai fault code 14 will require a fully qualified technician to provide the repair or replacement parts.

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