Electrolux washer model EIFLS6OLSSO only works on fast cycle?

If it is new, contact the seller under warranty. This model is only available in Saudi Arabia, we are in North America. According to the specs, it is a condenser dryer with no vent to outside. These do take longer to dry, but they should dry eventually.

https://www.electrolux.sa/en-sa/appliances/washer-dryers/eww1141aesa/#specifications

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You may have a weak clutch. If you can stop the washer during spin by hand, that's what it is.

Hello jamespeattie - Does the washer making a humming noise? If so, either the drain hose may be kinked or the drain in the house is clogged. Once you have confirmed and cleaned the hose and if issue continues contact a professional to move forward accurately. The unit may possibly have a faulty pump or control board.

Sounds like the timer and control board are not communicating correctly and efficiently when in a normal cycle. You would need a professional to diagnose the control board and see if that is the only part needing replacement.

some of these machines have a timer conflict between rinse [ spin pulse ] and full spin at end of wash cycle the timer contacts remain in the pulse cycle the switching assembley may need replacing

Well I'm an idiot. They did say there was a fast wash, but it specified that it was for extra rinses to help people with detergent allergy etc., but did not give a time for the cycle. They should have said it was the short wash for everyone. I tried it, and it was fine. Thanks anyway. If I ever have a real problem, I'll be back.

Hi. this is a failed timer device. simply replacing the timer control module will eliminate these issues you are having.

Great that exactly the desired result, probly needed a belt for a while.

sounds like your spin brake is not releasing when the spin starts