What are the reasons for the clutch pedal not rebounding properly when pressed down?

[SanKyle]

The specific reasons for the clutch pedal not rebounding properly when pressed down are as follows: 1. Air entering the clutch hydraulic system, causing excessive clutch travel and poor return. 2. Contaminated clutch fluid with impurities, leading to severe wear of the clutch master cylinder (piston) or blockage of the return oil hole, preventing the clutch from returning. 3. As the vehicle mileage increases, the clutch return spring may lose tension or break, causing the clutch pedal not to return. The symptom is reduced pedal height with decreased or no free play. 4. Excessive wear gap in the clutch linkage push rod causing poor return. This type of fault requires replacement of the clutch master cylinder or linkage mechanism.