High refrigerant temperature reported during and after supercharging

[kirkusss]

Today have experienced during a supercharging session (19-86%) some very loud fan noises with refrigerant temps reported by SMT above boiling (115 Celsius).
Have heard the fan so loud during last few weeks AC sessions to the point I went in the garage to check the noise I was hearing 2 floors above.
Could it be a faulty sensor? Looking at the cell temps it doesn’t look bad:

 

[TLLMRRJ]

What year?

 

[kirkusss]

2015, 85D

 

[TLLMRRJ]

With that age and miles, I would start by putting gauges on the AC high/low sides to see if the pressures look ok.

 

[kirkusss]

On the cabin side I get cold air without issues (car has almost 120k miles)

 

[gillmj24]

My 2015 with half the mileage behaves similarly

Really hear the AC pump after reaching 70% battery during a supercharge. AC blows cold but I turn it off and the pump noise gets much quieter.

 

[Big Earl]

I would check your air conditioning condensers to make sure they aren’t plugged with leaves and dirt. You will probably need to wash them with a foaming condenser cleaner.

 

[kirkusss]

For me it does like an airplane with the car shut off, no AC inside. After unplugging it continues to do so for 20-30 minutes.
What is strange is that the AC inside the car blows a lot colder than it should. Even at 23 celsius it blows freezing cold air. That’s why I wonder is some temp sensors quit.

 

[quickstrike12]

Front louver doors failing to opening ?

 

[DerbyDave]

If the temp is too high, wouldn't the car show error and warning messages?

 

[kirkusss]

In service menu I only see my left louver with an error, but it's like this since last year. The behavior started just few weeks ago.

 

[TMeister]

Others have advised you to get some gauges on your refrigerant lines. Which is what you should do. When the evaporator is delivering really cold air it is freezing up which is a sign that you are low on refrigerant. What happens is all the liquid refrigerant boils into gas before exiting the evaporator and then supercools after that. The normal exit air temp for R134a for the evaporator is 43 degrees F. It's probably a simple top-up with refrigerant. R134a does leak through the rubber hoses over time.

 

[TLLMRRJ]

Others have advised you to get some gauges on your refrigerant lines. Which is what you should do.

The "others" refers to just me.

 

[airborne spoon]

Check your louvers, if they aren't opening the fans will max out and stay maxed out in an attempt to cool things