The Webasto (often the 1533 "Oval" model) is a compact control unit used to program and operate your vehicle's parking heater. It allows for immediate heating or scheduled starts to ensure your car is warm before you enter. Core Operation Guide Immediate Heating (Instant On):
Wait for the display to stop flashing; the program is now active (the corresponding number will stay visible on the screen).
To turn it off manually before the timer ends, press the Flame button again. Press and hold the Clock button until the time flashes.
If the display shows "F" followed by two digits (e.g., F01), this is a fault code. Refer to the Webasto 1533 Manual to identify the specific issue. Webasto Oval Timer 1533 Operating Instructions Manual
You can change how long the heater runs (10–60 minutes) by pressing and holding the Set button while the flame symbol is displayed, then using the arrow buttons.
The timer can store up to (labeled 1, 2, and 3).
Use the or Reverse (<) buttons to set the current time. Press the Clock button again to save. Programming a Preset Start Time: