In January 3th, 2020, the engineers' team of my factory went to Heihe of China, the northest city of China.
We testing our coolant heater (DW5) in extremely low temperature. Of course, the DW5 is picked up randomly.
The result of the testing: the DW5 runs perfectly in even -35℃，with heavy snow. The engine is heated efficiently and runs very well.
Our factory will test our parking heater every year, and we have done this for 10 years. By the testing our air parking heater and coolant parking heater, we can find out the problems and solve it.
