Reddit mentions: The best automotive ac accumulators & parts

Funny thing is those are radiator fans and people do use zip ties to attach them to radiators just not the zip ties that you usually use they look like this https://www.amazon.com/Universal-Fan-Straps-Mounting-Radiator/dp/B003ZWXIAO

Putting in an accumulator in the system is probably necessary, it keeps the pump from cycling on and off incessantly.

https://www.amazon.com/SHURFLO-182-200-Pre-Pressurized-Accumulator-Tank/dp/B000N9VF6Q for example.

It's called an accumulator tank, here is an example for an RV. https://www.amazon.com/SHURflo-182-200-Pre-Pressurized-Accumulator-Tank/dp/B000N9VF6Q

Interdynamics FIN-1 Air Conditioning Fin Comb

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.amazon.com/bayite-Diaphragm-Priming-Pressure-Adjustable/dp/B074MZYS37&ved=2ahUKEwj7zcOjgrXiAhWhxlQKHcjHDpsQFjAAegQIBRAC&usg=AOvVaw2CG6WXejhWSatkNrjFgl-G



https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.amazon.com/Seaflo-Pre-Pressurized-Accumulator-Tank/dp/B01MVA6GCC&ved=2ahUKEwj6uZq3grXiAhVIl1QKHepiCjEQFjAEegQIAxAB&usg=AOvVaw0p7IxyCFGVv0hAILggLjyL

At some point in life, you'll eventually learn that cutting corners costs more in the long run. Buy quality gear so it won't have to be replaced again.

https://www.amazon.com/Shurflo-2088-554-144-Fresh-Gallons-Minute/dp/B00C1M6B1C/

https://www.amazon.com/gp/product/B000N9VF6Q/

if you want a answer from the author, post to youtube. This is a on off valve, you can pulse the valve, 1 s off, 1 on or 0.5:1 ... if it needed to be smother, look into a water accumulator. You would need to program it also.

I run a Flojet to an accumulator to supply water to my Profitec 700 during coffee popups. Total cost for those two was $160. Add in a few more bucks for the hoses and connectors. The accumulator supplies a steady 30psi ~2bar of line pressure.

Flojet, Accumulator

To give you a visual of the kinds of things you're looking for, I YT searched, "Astro AC vents vacuum tube" and got this video.

To elaborate on what's going on, most vehicles' climate control is operated off of a vacuum system. The engine produces negative pressure through the intake (on a gas engine; a turbo diesel may have an actual vacuum pump), and that is transferred through a check valve (so if the engine cuts off, the pressure is maintained) and then on to the actual climate control knob in the dashboard. The vent switch then connects that with other tubes that move little flaps to direct the air flow. It's done with vacuum by law, so that if the system fails, it should always default towards the windshield and floor, to defrost as a safety measure.

What happens is the vacuum line in the engine bay is comprised of a hard plastic that gets brittle with heat cycles over time, and cracks open, losing the negative pressure inside it, thereby losing the ability to control which vents the air comes out of. In my case, and in many Astros, it broke apart about 6" from where the line goes into the cowl, in the engine bay, but it was only a couple inches from a rubber connector holding it to the check valve, so I just removed the short section, cut the broken end flat with my pocket knife, and reconnected it directly to the check valve.

Basically, you're looking for two small plastic tubes that are no longer connected to each other, and need to reconnect them. Worst case scenario, you need to run a new vacuum line, hopefully (and in the vast majority of cases) just within the engine bay. You don't need to use the same brittle plastic line, and in fact, regular ol' NAPA tubing by-the-foot is a great option, because you can get a size of tubing that slips right over the existing line. No crimps, no clamps, just so long as it's a snug fit.