Functionality | Troubleshooting
Flow Sensor Assembly FSA QC MED/LRG. This sensor is crucial as it detects water flow, triggering the unit to activate.
Unsure if your flow sensor is the culprit? Here's a quick check: If the unit's LED lights up when you adjust the knob, it means your control board and power supply are functional. However,
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27 ratings
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All good
all went well with no issues
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Anonymous · August 24, 2026
good part
D
don · August 29, 2026
worked perfectly. first one ordered from amazon was not compatible with motherboard.