Why does the car drip a lot of water when the air conditioner is on?

[StJayden]

Condensation from the air conditioner. Reasons why the car drips water when the air conditioner is on: 1. Condensation of hot air on surfaces: Because the car's air conditioning system has an evaporator installed on the dashboard, when the air conditioner is turned on (the air conditioning key is turned on), the surface temperature of the evaporator is very low. The moisture in the hot air inside the car will condense on the heat-absorbing fins of the evaporator, and the water droplets are collected by the plastic housing of the evaporator and discharged out of the car through a pipe. 2. Condensation of air: Outside the compressor (low-pressure area) in the engine compartment, the moisture in the condensed air will also fall to the ground (sometimes the amount of water is greater than the drainage from the evaporator). 3. Lack of insulation foam covering: If the low-pressure pipe is not covered with insulation foam, moisture in the air can easily condense on the surface of the pipe, and water droplets usually accumulate at the lowest point of the pipe.