Hisense fridge freezer not cooling at all

If both the fridge and freezer have gone to room temperature on a fairly new Hisense, the fault is usually something affecting the whole cooling system rather than just one section. With a unit only a few months old, warranty support should also be high on the list.

Before checking anything internal, isolate the appliance from the mains. Any mains, sealed refrigeration, or gas-related work should be left to a qualified engineer.

1. Check the basics first - Make sure it is definitely powered: interior light/display on, and no tripped fuse, plug issue, or socket fault. - Confirm it hasn’t accidentally been switched off or put into a demo/showroom mode if it has an electronic display.

2. Listen for signs of life - Put your ear near the back/lower rear area. Can you hear the compressor humming, clicking, or trying to start? - If it is completely silent apart from lights/display, that points more towards a control, thermostat/sensor, or power issue.

3. Check airflow and location - Make sure the appliance has ventilation space around it and the condenser area isn’t blocked with packaging or dust. - If it was recently moved, it may need time standing before restart if laid down.

4. Look for obvious frost or fan issues - If you can hear a fan inside but no cooling, or repeated clicking from the rear, that helps narrow it down. - Heavy ice build-up behind the back panel can sometimes stop cooling, though on a machine this new it would be less common.

5. Because it’s only a few months old - Don’t dismantle too far. A failed compressor, inverter board, start device, control board, or sealed system fault are all possible, and these are warranty jobs.

If you can say whether the lights/display work and whether the compressor is running, clicking, or totally dead, that would narrow it down further. Otherwise I’d strongly suggest contacting Hisense under warranty.

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