What are the effects of a faulty electronic thermostat on a car?

[McChristopher]

Thermostat failure will prevent the engine from operating at optimal temperature, increasing engine wear and shortening its service life; engine oil will not reach optimal viscosity, increasing engine operating resistance and causing higher fuel consumption. Relevant information is as follows: Thermostat working principle: The thermostat automatically adjusts the amount of water entering the radiator based on the coolant temperature, changing the water circulation range to regulate the cooling system's heat dissipation capacity, ensuring the engine operates within an appropriate temperature range. The thermostat must maintain good technical condition; otherwise, it will severely affect the engine's normal operation. Too late and too early: If the thermostat's main valve opens too late, it will cause engine overheating; if the main valve opens too early, it will prolong the engine warm-up time, resulting in the engine temperature being too low.