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Troubleshooter - Refrigerate-freeze combi

5Possible solutionStep 5 Common of 5
These are normal injection noises from the coolant that is found in the gas phase in the evaporator (in the rear wall on the inside).
Because the new, environmentally-friendly type of coolant (R600a) is lighter and has a lower density, more of it has to be used and circulated. This can cause these operating noises to be very different from in a previous appliance.

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