1. Incorrectly Installed Compressor: If the air conditioning compressor was not installed correctly, it could be causing vibrations due to misalignment or loose connections.
2. Faulty Compressor: A defective compressor can generate vibrations and trigger dashboard alarms.
3. Damaged Drive Belt: The air conditioning compressor is connected to the engine by a drive belt. If the belt is worn, loose, or damaged, it can cause vibrations.
4. Loose Engine Mounts: Engine mounts hold the engine in place and absorb vibrations. If they are loose or damaged, excessive vibrations can occur.
5. Vacuum Leak: A vacuum leak in the engine or the air conditioning system can result in vibrations and trigger dashboard alarms.
6. Electrical Issues: Electrical problems related to the air conditioning system, such as a faulty wiring harness or a malfunctioning sensor, can lead to vibrations and dashboard alarms.
7. Resonance Effect: In certain cases, changing a component like the air con compressor can alter the vehicle's resonance characteristics, causing vibrations at specific engine speeds.
8. Engine Timing Issues: Improper engine timing, specifically misaligned timing belt or chain, can cause engine vibrations and dashboard alarms.
Solution:
To resolve the issue, it's recommended to have the vehicle inspected by a qualified mechanic. They can identify the exact source of the vibrations and alarm, and perform necessary repairs or adjustments.