A/C cycles warm and cold after a repair
- Symptoms
- After an evaporator repair the A/C blows warm, then cold again
- Likely cause
- A faulty compressor control (PWM) valve; debris or moisture in the system after the repair.
- Fix
- Have the compressor control valve tested with a scan tool. Flush the system before fitting new parts.
- Applies to
- 1.5 Turbo (owner report)
- Confidence
- low
Sources
Related problems on this car
- Noise on a cold start that goes away when warm
- Steering stiff or knocking (steering rack)
- ABS and VSA lights on together
- Battery loses water and goes flat
Similar problems on other cars
- Cold start, then engine dies · Toyota Vitz (1st gen)
- A/C stops cooling: variable compressor failure · Toyota Corolla (11th gen, E170)
- Tapping noise on a cold start · Suzuki Wagon R (Pakistan, K10B)
Where the parts are · Warning lights · Fault codes · Maintenance
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Guidance only – confirm with a mechanic before repairs. All common problems