Daewoo FRS 2021 fridge shutdown fault

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  • Thread starter Thread starter Guineafowl
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    Fault fridge
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SUMMARY

The Daewoo FRS 2021 fridge experiences random shutdowns and a blank display, often requiring a restart after a variable interval. The issue is traced to the power supply, specifically the inadequately heat-sinked switching controller STR G6352. Users are advised to replace this component and apply heat-sink compound to prevent future failures. Power cycling does not resolve the issue, and replacing the motherboard is often unnecessary and costly.

PREREQUISITES
  • Understanding of electronic components, specifically power supply circuits.
  • Familiarity with the Daewoo FRS 2021 service manual.
  • Basic soldering skills for replacing electronic components.
  • Knowledge of heat-sink application techniques.
NEXT STEPS
  • Research the specifications and replacement procedures for the STR G6352 switching controller.
  • Learn about effective heat-sink application methods to enhance component longevity.
  • Explore troubleshooting techniques for electronic appliance power supply issues.
  • Review the full service manual for the Daewoo FRS 2021 for additional insights.
USEFUL FOR

Technicians, appliance repair specialists, and DIY enthusiasts looking to troubleshoot and repair Daewoo FRS 2021 fridge power supply issues.

Guineafowl
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TL;DR
An apparently common fault where the fridge shuts down randomly. I couldn’t find a solution online, so am posting here for others.
Symptoms: Random shutdown of entire fridge/freezer, blank display. Restarts after a variable interval. Power cycling doesn’t seem to help.

Forums etc., suggest ‘replacing motherboard’ (on top) but this is often expensive and may not be available.

I managed to catch it in shutdown, and found the 12V, 16V and 5V rails were pulsing up and down (chirping power supply). When it was running, these rails would sag if lots of fans were running.

The full service manual is here: http://www.de-direct.co.uk/downloadb2b/smref/FRS2021.pdf

The fault is in the power supply:
7CB477AB-FA77-4692-BC94-63E8C72F75CA.png


The switching controller STR G6352 is inadequately heat-sinked. Replace it, and add some heat-sink compound.
 
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Thanks for posting the solution!
 
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