PassoFix

A/C load: idle vibration & poor pick-up with A/C on

Symptoms
Vibration at stop in D with A/C on, stops in N or A/C off; weak cooling
Likely cause
Refrigerant charge/high-side pressure, compressor/condenser condition; also catalyst/mounts
Fix
Recover and recharge exact 300±30 g HFC-134a (factory K1); inspect compressor, condenser
Applies to
KGC10/KGC15/QNC10; Boon M300S/M301S/M310S (same platform)
Related fault codes
none
Confidence
medium

Sources

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Guidance only – confirm with a mechanic before repairs. All common problems