I have a Beko Dryer. Very basic model with a time dial, start button and heat setting button. I have a timer plugged into the plug with the timer set to turn on the dryer when eco 7 cheap rate Starts. The timer I use has one of them switches which can either make the timer be on all the time, or set to turn on and off at the preset time.
Follow these steps and it might work for your dryer.
1) Flick the little switch on the timer to the always on position.
2) Load the dryer with your clothes and close the door.
3) Turn the timer dial to 0 mins (basically the off setting).
4) Press the start button for about 1 or 2 seconds, you will hear an electric buzzing sound, (this is the start capacitor charging up ready to start the motor).
5) Flick the little switch on the timer from always on to timer mode.
6) Now the dryer has no power because it’s not the right time for cheap electricity, turn the time knob to the amount of time you want to dry your clothes for. I normally just put it to 1 hour.
Nothing will happen, but as soon as the cheap electric rate starts and your timer send power to the dryer, it will automatically turn the dryer on, it will just automatically start because the capacitor is charged up and ready to go.
Note, if you do all the above steps, and then open the door to maybe add more clothes, one you open the door, for some reason, the capacitor drains the power and if you close the door again, it won’t auto start, you’ll need to complete the above steps again.