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1. Disunite the electric socket of the sensor switch and uncover the GTTs tank.
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2. Check freedom of the course of a float of the sensor. In case of identification of signs of jamming replace assembly. By means of an ohmmeter make sure of lack of conductivity between sensor switch socket plugs at the lifted float and of its existence at the lowered float. |
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3. Make sure available conductivity between socket plugs at the lowered float. |
4. At negative results of checks replace the faulty sensor switch. |