Quote Originally Posted by afrasay View Post
Dati ba malamig yun rear aircon? if expansion valve ang sira, walang lamig na lalabas sa rear puros hangin lang. the solenoid or shut off valve only shuts off the freon/oil flow sa rear evaporator to prevent freezing of the cooling coils. any difference in the cooling effect either on or off is negligible. kung gusto mong lumamig yan install a separate condenser for the rear aircon. nga lang baka di na kayanin i-pump nun compressor yun added freon and oil.
In my case, Hyundai Grace already have two condensers still the same thing is happening.

I have brought it to a good ac repair shop (as per the forums here), and they did the following:

1. Cleaning/leak test of two evaporators and testing of compressor.
2. Change 1 of the two hoses connected to the compressor.
3. Change drier and 2 expansion valves.
4. Change some of the fittings.
5. Cleaning of two condensers via high pressure water.
6. Cleaning of air ducts on the rear.
7. New line and switch for the rear motor.
8. Change from R12 to R134a.

After correctly charging the freon they tested the ac and to my surprise the rear has a lot of wind but no coldness.

They told me that the compressor needs to be changed.
I thought WTF! They tested the compressor and told me that it was ok and now they are telling me otherwise.

Before I forget, I paid PHP8500 for their service and left the shop very dismayed.

I felt that I did some unnecessary spending that day.

That is why I will try to visit other ac shops just to get their opinion and to avoid spending unnecessarily.

Any information, idea, help and suggestion from fellow tsikoteers will be highly appreciated.

Again TIA.