Defrost Issue and AC

Select outside air and high fan speed. AC is supposed to operate when the defroster vents are selected and the fan is running. A little bit of heat will help, especially if the AC is so cold that you’re using your wipers to clear condensation on the outside glass.

 

I think your slow-to-start AC is the first thing you must address, might be the only thing. I'd use dealership, and pray they know what they've doing. Go in asking lots of questions, verify they know what the issue is: you don't just want a bandage AC service that doesn't resolve the slow start.

One quibble I have with Toyota's vent system too: why-oh-why don't they have a regular vent mode where ALL the air goes to the windshield, not half'n half windshield/feet.

 

Slow starting or non-functioning AC sounds to me like you need to have the AC checked and probably filled.

 

If you press the defrost button on the right side of center console, next to rear defrost,
all the air goes to the widshield. Or at least 95% of it does.
At least it does on my Prius. I remember checking it when I first go the car.

 

The AC removes moisture on the inside of the windshield. The wipers remove moisture on the outside. If your wipers are removing the problem condensation, your AC isn't the problem.

 

Sorry, I couldn't read through that digital dumpster fire on the Beetle forum -- it made my head hurt.

I think this is operator error. Are you trying to use cold air from the AC to remove condensation on the outside of the windshield? If so, that's not going to work.

 

Why even post this in the first place then

 

Have the compressor checked. It could be failing.

 

Let’s get back to basics. Keep it simple.

1: What was the method that was used to recharge the air conditioning ? (. Example it was completely recovered, than a vacuum pump was put on it, and then it was recharged by weight ?)

But for some reason even that doesn’t mean it’s done right since most machines over 5 to 8 years old or plus or -2 or 3 ounces from what they say they put in. I got a couple cars coming to me every week that just came from shops that required one quantity of refrigerant added but when I recover it’s never what they say it was and that was the only reason the air-conditioning is not operating properly.

Two days ago I was called into a shop who is having problems technician punched in .9 pounds to be added to the car. The car did not operate properly so the technician removed refrigerant in their machine recorded and only removed .7 pounds.
Technician recharge the car again with .9 pounds car still did not work properly so the technician recovered it and only pulled out .7 pounds.
The new $5000 machine was less than a year old. Being 2/10 of a pound off on a Prius is a near death sentence on AC performance.

This afternoon‘s car came from a Mercedes specialist shop who just performed the air conditioning yesterday the owner drove away and when it got hot the AC did not perform well the next day so I got a call.
The invoice from the Mercedes special shop said they charged a car with 1000 g exactly what it should have and there was no leak.
I recovered the refrigerant this afternoon and only 780 g were in the system this was their performance problem. There is no leak in the system the accuracy of the scales on some of these machines are pathetic after a few years.

Do you have any pressures to give us high side pressure low side pressure outside ambient temperature at the time of taking the pressures.

hopefully warm late afternoon when it’s 80° plus. All windows and doors open in Fresh Air mode . Record high side and low side pressure inlet air temperature going to the air filter outlet air temperature leaving the duct Dash

Repeat this with all doors and windows closed in recycle Mode Record pressures and temperatures.

If possible only if a clamp on type thermal couple device is available NOT! infrared. Clamp temperature device to the suction line pipe ( Large diameter large diameter ) going back to compressor. Record temperature.

With this information there will be a less guessing and we might get somewhere make it much more easy.