Simpson SWT954

The Simpson SWT954 is a 9.5 kg top load washing machine (Electrolux design rebranded as Simpson with minor changes).

Causes

 * Off-line SMPS IC has partially failed and is tripping it's internal over-temperature cut-off

Solutions

 * Replace SMPS U9 TNY278PN

Causes & solutions

 * Unit is overloaded: ensure weight of load is less than your model's limit
 * Load is imbalanced: redistribute load to be more balanced
 * Bowl springs have failed or become loose: replace or re-tighten


 * Out of balance detection switch is not aligned correctly: replace or re-align

Disassembly Notes

 * This device is designed well with service and repair in mind
 * The manufacturer has published exploded assembly diagrams showing all fasteners and components (See 'EX. VIEW DRAWING 7696' for SWT954)
 * The front control panel bezel is held on with two screws at the back of the unit
 * The power supply and motor drive PCB is removed with two screws and unclipped from the plastic holder

Power supply and motor drive PCB
HT-PCB-140-08058A-P-V06

Power supply and motor drive PCB
If parts are not available or different selection is preferred, you can use the values in the Original Parts section to perform a parametric search

Related Links

 * Simpson Washing Machine SMPS Repair - WizardTim (YouTube)