Order of execution
1. Loosen the clamps and disconnect the hot and cold air supply hoses from the thermostat.
2. Loosen the clamp and remove the thermostat.
3. Immerse the working part of the thermostat thermostat in warm water (about 20°C) for 2 min. The damper in the thermostat should turn and close the cold air inlet. If it doesn't, replace the thermostat.
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