This is a follow-up to a previous repair I did on a Vorwerk VK 140 Folletto vacuum cleaner, which you can find https://davidegironi.blogspot.com/2023/10/vorwerk-vk-140-folletto-vacuum-repair.html. Unfortunately, after some time, the vacuum started acting up again.
This time, the issue was quite peculiar: when running at maximum speed, the motor RPM would suddenly drop for a second, then go back up, then drop again, in a repeating loop. It looked like the motor controller was struggling to maintain stable operation.
I opened up the vacuum cleaner once again, focusing this time on the main control board. Upon inspection, I noticed a capacitor with a bulged top, a clear sign of failure. It was likely a low voltage electrolytic capacitor used in the logic control circuit. When these capacitors degrade, they can cause erratic behavior in the control logic or power regulation circuits.
I replaced the faulty capacitor with one of the same value and voltage rating, making sure to use a quality component rated for high temperature and long life. After the replacement, I reassembled the vacuum and gave it a test run.
The motor now runs smoothly, even at full speed, no more RPM drops or interruptions. It seems the failing capacitor was causing unstable voltage in the control section, which in turn affected the motor regulation.
This time the repair was simple. Hopefully, this will be the last time I have to open up this Folletto.
Notes
- read risk disclaimer
- excuse my bad english
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