Possible causes
Check for the following possibilities:
- The yeast used was not stored correctly, or is out of date.
- The protein content in the flour was low.
- The room temperature changed during operation (e.g. the air conditioner was turned on, etc.).
- The water became warm during timer setting.
- The room temperature is over 30°C/86°F, or is near, or below, 5°C/41°F.
Yeast is a living organism and is easily affected by a slight change in the room temperature.
Flour quality is affected by keeping methods, temperature and humidity. The quality of the wheat crop is also affected by growing conditions and this can vary from season to season.
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