AC evaporator freezing

Usually happens after 20mins. I can hear the blower fighting the blockage. I then switch to eco mode and wait till the fan begins to blow again by melting the ice.

The garage did top off the freon to the max and installed a new cabin filter then blew out the condensing coils.

Could the freezing be caused by just a tad over the limit or something else like a bad relay?

Your system is designed to NOT to cycle- so a relay bad would not cause this---

You have a bad control valve in rear head of compressor- it can be replaced without removing the compressor IFFFFF you can find a shop to do that without replacing the compressor- they will tell you it is not available, they are wrong- most parts house have them--the mechanic is just lazy- and has never tried this-- I am certain, it is the control valve UNLESS you have charged the system WITHOUT pulling a vacuum first.....air in the system does cause freeze-up.

buy one online would be easier - from our site sponsor or from any a/c website

i googled intrigue a/C control valve to see what it looks like but does not come up with anything

could it be named differently?

Yes, type in "V5 compressor control valve"- I just did and got numerous hits..

Before changing any valves, I would like a set of gages on this vehicle to see high and low pressures....