Electric heating oven tube why later will not red red
The lower heating tube is the first one, lighting time is longer, and the number of the upper tubes is interrupted. With lower temperature setting, the temperature in the oven is always close to the setting value.
This is the result of automatic temperature control, in order to ensure that you set the temperature, so the heating pipe in the constant adjustment of voltage or current, so you will see the heating tube is bright and dark phenomenon. This is a normal phenomenon, although rest assured.
First, make sure that you choose to heat the file up and down.
