A/C stops blowing

Good morning.

I would start by checking the connection at the blower motor itself. It is common for this to be hot and bad connection results.

Roy

https://www.2carpros.com/articles/blower-fan-motor-works-on-high-speed-only

Maybe it is still going but not getting through to you?

I am sort of looking at the possibility of low vacuum to the HVAC controls, sort of "defaulting" the door(s) to another position.

A few possibilities might be:

Engine wear/need of a tune up/possible vacuum lines broken or cracked or not attached. If there is a vacuum reservoir, maybe it is not hooked up.

A vacuum gauge hooked to the intake and ran back into the cockpit might show what the actual vacuum is when this is happening.

I have a "shop gauge" for tuning and one mounted on each of my Jeep dashes. Vacuum gauges are great diagnostic tools for an engine before tearing into one!

Here is a guide for vacuum leaks:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Keep us posted, if you need more information let us know.

The Medic