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Tim Mohr
Tim Mohr, ASE MASTER TECH
Category: Nissan
Satisfied Customers: 560
Experience:  30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL
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2010 NISSAN A/C LINE FREEZES AFTERAT TIMES, YES, ITS FINE,

Customer Question

2010 NISSAN A/C LINE FREEZES AFTER*****AT TIMES
JA: Have you checked the Freon level?
Customer: YES, ITS FINE
JA: What is the model of your '10 Nissan?
Customer: ALTIMA
JA: Are you fixing your Altima yourself? What have you tried so far?
Customer: MECHANIC, ONLY CK'D FOR CODES AND FREON LEVEL SO FAR
JA: Anything else you want the mechanic to know before I connect you?
Customer: NO
Submitted: 2 months ago.
Category: Nissan
Expert:  david craig replied 2 months ago.

Hi Im David, thanks for visiting the site. have the mechanic test the evaporator temp sensor.

Customer: replied 2 months ago.
ACTUALLY, I'M THE MECHANIC BUT I DON'T WORK MUCH ON FOREIGN CARS, WHERE IS THAT LOCATED? I COULD NOT READ IT WITH MY SNAP ON MODIS
Customer: replied 2 months ago.
ANY OTHER SUGGESTIONS
Expert:  david craig replied 2 months ago.

thats the most probable cause. its located in front of the evaporator.

Expert:  david craig replied 2 months ago.

you have other possibilities...
1) a defective thermal expansion valve (TXV). Since it takes a while for ice to form, and it will often melt after the evaporator is blocked long enough for the temperature to rise above freezing, the air conditioner seems to work intermittently.

2) A failing AC compressor can cause the same symptoms (if a variable compressor gets stuck at full stroke), failed receiver dryer can cause similar symptom (desicant blocks TVX or evap core)

3) if the car has had a refrigerant leak, moisture in the refrigerant can freeze inside the evaporator, causing a blockage.

4) be sure condensate drain is not blocked, and make sure cabin air filter is not blocked/dirty and not plugged with leaves.

5) If system is overcharged, freezing can happen.

Expert:  david craig replied 2 months ago.

hows it going?

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