Frequent question: Why does my car AC go from cold to hot?

A small refrigerant leak is the most common reason a car’s A/C gradually loses its cool. … A leak in your A/C system could be causing the unit to blow warm air, since there isn’t enough refrigerant in the system to cool things down.

Why does my car air conditioner go from cold to hot?

Car AC blows cold then warm. If your car AC blows cold then warm, the cause can be a low system charge, moisture in the system, a malfunctioning expansion valve, clogged evaporator fins or an overcharge condition.

Why does my car air conditioner sometimes blows hot air?

A car A/C blowing hot air is often the result of a refrigerant leak. Refrigerant is a liquid that circulates through your car’s A/C system, expanding and contracting as it removes heat and humidity from the cabin. None of the other A/C components will function correctly without proper refrigerant levels.

When it’s hot outside my car AC doesn’t work?

Like having a blocked condenser, having broken cooling fans can cause a lack of cooling at your condenser and could cause your car AC blowing hot air. … Like broken condenser fans and electrical fault can cause a normally working system to stop working simply due to a bad connection or faulty sensor.

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Can a dirty air filter cause car AC not to cool?

A dirty air filter restricts the flow of cold air, causing it to build up inside the air conditioner and lower the internal temperature. … Uneven Cooling: Even if it’s not enough to cause freezing, that restricted airflow isn’t good for your air conditioner’s cooling power.

How do I know if my car AC compressor is bad?

Symptoms of a bad Ac compressor in a car

  1. High cabin temperature.
  2. Loud noise from the AC compressor.
  3. Moisture leak.
  4. Compressor clutch stiff or not moving.
  5. Tripping circuit breaker.
  6. Broken Suction Lines.

Will AutoZone put Freon in my car?

Or, if you’d like to tackle the job yourself, AutoZone has all the tools and refrigerant to service your R-134A or R-12 vehicle.

How do I know if my car air conditioner needs recharging?

5 Signs you need a car air conditioning service

  1. The air isn’t cold. …
  2. Bad odour. …
  3. It’s making a rattling sound. …
  4. Weak or no air coming out. …
  5. Condensation.