What Causes a Car to Overheat When Climbing a Slope?

[LeZachary]

The main reasons for a car's high coolant temperature when climbing a slope are as follows: 1. The temperature gauge shows excessively high readings: When stuck in traffic or idling for extended periods, the engine temperature gauge displays high readings, the electric fan operates at high speed for too long, engine noise increases, and the issue is most noticeable when using air conditioning in hot weather; 2. Unstable idling: When using air conditioning in hot weather, the idle speed becomes unstable with significant fluctuations, acceleration feels sluggish, and the engine produces abnormal noises; 3. Engine stalling while driving: After the engine stalls when hot and sits for over ten minutes, it becomes difficult to restart. The car may also stall automatically while driving when hot; 4. Poor cooling performance: The air conditioning cools effectively when the engine is cold, but its performance deteriorates when the engine is hot. Additionally, there may be noticeable resonance and humming noises from the air conditioning system.