What happens if type I deicing fluid is not heated to the appropriate temperature?

Type I deicing fluid is designed to operate effectively within a specific temperature range, as its primary function is to lower the freezing point of moisture on a surface, allowing for safe operations in winter weather conditions. When the fluid is not heated to the appropriate temperature, it fails to reach its optimal viscosity and performance. This results in the fluid not spreading properly over the aircraft surface and not adhering effectively, which compromises its effectiveness in preventing ice and snow accumulation.

Inappropriate heating can lead to a situation where the fluid becomes too thick to flow or spread evenly, which means it cannot adequately provide the necessary protection against ice formation. Thus, using type I deicing fluid that hasn't been heated correctly will render it significantly less effective, potentially endangering the safety of flight operations.