Error code

Mitsubishi Electric PWFY code 5108

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Meaning

TH8 temperature sensor failure (BU, AU): When a short (high temperature intake) or an open (low temperature intake) of the thermistor is detected (the first detection), the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts when the detected temperature of the thermistor. When a short or an open is detected again (the second detection) after the first restart of the outdoor unit, the outdoor unit stops, turns to anti-restart mode for 3 minutes, and restarts in 3 minutes when the detected temperature is within th

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Possible causes

(4) A pin on the male connector is missing or contact failure (6) Thermistor input circuit failure on the control board

Solution

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