A/C in truck freezing up?

[jetmech1983]

Got a question about a 2003 Chevrolet 2500hd. The truck has been getting water in the passenger side floorboard from the A/C evaperator core. We have made sure the drain is clear. When you first turn on the A/C it drains just fine, after you shut it down for about 30 min, you can turn it back on and it blows water like a hose. Only thing we can come up with is that the evap. core is freezing up and forming ice. Any ideas what can cause this?

 

[Sigforty]

A leak in the evap core is the most likely suspect. Have you had to recharge the system frequently?

 

[jetmech1983]

A leak in the evap core is the most likely suspect. Have you had to recharge the system frequently?

Never had any service done. A/C still blows cold enough to fog up the cab of the truck.

 

[3axap]

Have the pressure in the system checked. You could be slightly low and it will cause ice formation. The system may still cool ok (especially a smaller cab space in a truck), but be low on freon and thus freezing up.

 

[smith625]

Your low pressure cycle switch is the most likely culprit, especially if this happens after some run time.

 

[jimdana1942]

Low freon; orfice tube problem. With the AC on check the return line from your evaporator, is it freezing on the outside? Does your AC have a cabin filter? If so, change it.

 

[Sigforty]

Never had any service done. A/C still blows cold enough to fog up the cab of the truck.

Everyone else pretty much mentioned the other items to look at. Get the levels checked and then look at the pressure switch. My next vote is for the pressure switch not causing it to shut off and thus causing the water in the air to ice the evap coil.

 

[MALIBU12]

Your low pressure cycle switch is the most likely culprit, especially if this happens after some run time.

THIS