Why is my Wagon R AC blowing warm air intermittently while driving?

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Why is my Wagon R AC blowing warm air intermittently while driving?

While driving on the highway, I noticed that the AC in my 2020 Wagon R suddenly starts blowing warm air for a few minutes and then returns to cold. This cycle keeps repeating. I’ve checked the gas and basic AC components. Could this be a problem with the compressor clutch, thermostat, o r some electronic sensor issue?

Gari Specialist asked on 24 May 2025 16:43:09 pm

1 Answer

20 views |

Gari Master - on 24 May 2025 16:50:24 pm

Intermittent warm air followed by cooling is usually a compressor clutch o r thermostat issue.

Possible Causes:

Overheating of compressor clutch coil – It disengages under heat, then re-engages when cooled.

Faulty pressure switch o r thermostat sensor – These are responsible for regulating cooling cycles.

Moisture in the gas line – Caused by improper vacuuming before gas refill moisture can block the expansion valve.

Electrical fault in AC relay o r wiring – Causes the compressor to cut off intermittently.

What to Do:

Get the clutch coil resistance and thermostat sensor checked.

Replace the AC relay if it’s clicking on and off frequently.

Ensure system was vacuumed properly during last refill.

Tip: This issue often appears more in summer o r after gas top-up from unqualified technician