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U8: Dissection of Exhaust Temperature Sensor. Zero cross detection of circuit IDU.

U8 TROUBLESHOOTING STEPS:

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  1. Verify the Temperature Sensor:

    • Inspect the exhaust temperature sensor for any visible damage.

    • Ensure the sensor is securely connected.

  2. Examine the Indoor Board:

    • Check the indoor board for any signs of malfunction or loose connections.

    • Confirm proper wiring and connections on the indoor board.

    • Look for any anomalies in the zero cross detection circuit.

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