Does idling with the AC on harm a diesel vehicle?

[Claire]

Idling with the AC on can harm your vehicle. 1. Reason: It is not recommended to keep the engine idling with the AC on for extended periods, as this not only wears down the engine but also leads to deteriorating air quality inside the cabin when the AC is set to recirculate mode, potentially producing harmful gases. 2. Justification: The power consumed by the AC accounts for only a small portion of the engine's idle energy output. However, when idling with the AC on, the engine must not only power the AC compressor but also maintain the operation of the power steering and brake booster pumps, wasting energy. If the engine detects excessive pressure, it may automatically increase fuel injection, leading to higher fuel consumption and increased carbon buildup in the engine.