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Hisense

Hisense fridge freezer clicking and not cooling

LILiam C.
Asked 3 months ago 319 views
6

Hoping someone can help with my Hisense fridge freezer (RB645N4BFE) — it keeps clicking on and off every few minutes and isn't cooling. Really hoping it's a cheap fix.

Solution Summary

AI-generated from this discussion

This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.

Hisense RB645N4BFE clicks repeatedly and does not cool

The problem
Hisense fridge freezer RB645N4BFE was repeatedly clicking on and off every few minutes and not cooling.
Likely cause
Most strongly supported diagnosis was the compressor trying to start and then cutting out on overload. Possible causes mentioned were a failed start relay/overload device, compressor fault, inverter/control electronics fault, or a sealed system problem. The exact fault was not confirmed.
What fixed it
The accepted advice was to isolate the appliance, check whether the clicking was coming from the compressor area, ensure ventilation was adequate and the condenser area was not heavily clogged with dust, leave it unplugged for 20–30 minutes, and observe whether the compressor became warm/hot without settling into a steady hum. The start relay/overload on the compressor was suggested as a cheaper possible repair if testing confirmed it, but no completed repair was documented. Further diagnosis should be carried out by a suitably qualified appliance engineer.
Checks to try
  • Listen for whether the click comes from the rear near the compressor or from the control/display area
  • Check ventilation around the back and sides
  • Check whether the condenser area is badly clogged with dust
  • Leave it unplugged for 20–30 minutes and try again
  • Check whether the compressor gets warm/hot but does not settle into a steady hum
  • Inspect the compressor start relay/overload for overheating or rattling if accessible
Parts or tools mentioned
  • Compressor start relay/overload

Safety: Isolate the appliance from the mains before checking anything internal. Further diagnosis should be carried out by a suitably qualified appliance engineer.

Cause identifiedGenerated 17 Aug 2026 · AI summaries can make mistakes — read the full thread below.
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1 Answer

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WH
WhitegoodsHelp AIAI Assistant
Answered 3 months ago

A repeated click every few minutes with no cooling usually points to the compressor trying to start, then cutting out on overload. It can be something simple, but on many modern fridge freezers it can also be a compressor/start device or control fault.

Before checking anything internal, isolate the appliance from the mains.

1. Listen carefully to where the click comes from If it is from the rear near the compressor, that strongly suggests a start attempt/failure. If it is from the control/display area, the issue may be with the control board or relay instead.

2. Check the basics Make sure it has proper ventilation around the back and sides, and that the condenser area is not badly clogged with dust. Poor ventilation can cause overheating and repeated cut-out. Leave it unplugged for 20–30 minutes, then try again.

3. Check whether the compressor runs at all Put a hand near the black compressor can at the back after it has been plugged in for a few minutes. If it gets warm/hot but never settles into a steady hum, the compressor is likely failing to start.

4. Inspect the start relay/overload If accessible on your model, the small start device fitted to the compressor can fail and cause clicking. Sometimes it shows signs of overheating or rattles when removed. This is one of the cheaper possible fixes, but it needs proper testing rather than guessing.

5. Consider the less-cheap possibilities If a new start device does not cure it, the fault may be the compressor itself, inverter/control electronics, or a sealed system problem. Those are engineer jobs and often not economical depending on age and cost.

If you can say whether the click is from the compressor area and whether the compressor gets hot, that will narrow it down. For any mains, electronic, or sealed refrigeration work, I’d recommend a qualified refrigeration engineer.

WhitegoodsHelp AI

WhitegoodsHelp AI Assistant

This answer was generated automatically by the WhitegoodsHelp AI Assistant. It is not provided by an engineer or any other qualified person, may be inaccurate or incomplete, and is not professional or technical advice. Do not rely on it. Always use your own judgement and consult a qualified engineer before carrying out any electrical, gas or water work. Use is entirely at your own risk. See our full Terms of Use.

SAFETY FIRST: READ BEFORE ACTING ON THIS GUIDANCE

  • Never work on a live appliance

    Always unplug it at the mains before going near it with any tools.

  • Never attempt gas work

    By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional. Do not attempt it yourself.

  • Watch for sharp edges

    Outer panels are smooth, but internal parts have sharp machined edges. Wear protective gloves and arm sleeves.

  • Water appliances can leak

    Turn off the water supply before disconnecting any hoses.

  • Know your limits

    If you are not confident testing or working inside the appliance, stop and call a professional.

  • AI guidance, not guaranteed

    This response is generated automatically by the WhitegoodsHelp AI Assistant. It is not professional or technical advice, may be incomplete or wrong, and must not be relied upon. Always use your own judgement and consult a qualified engineer before any electrical, gas or water work.

This is general information only and is not professional advice. The WhitegoodsHelp AI Assistant is not an engineer and is not qualified. See our full Terms of Use.

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