Vehicle A/C and starting, stopping

[GhostSkull]

Yes I do but I also know that you will get consdesation in the ducts when that cold air just stops blowing and they warm back up to whatever the temp is...you ever seen all that water under your vehicle when shut it down and get out?

[GhostSkull]

Better yet... Go get ya a glass fill it with ice water and go set it outside and see how quickly the outside of that glass gets wet.... Same thing happens in those ducts when that cold air is cut off!

[TexMax]

Can we talk about how that condensation in the ducts comes from the moisture in the cab and molds ability to grow on porous vs non porous surfaces.

[GhostSkull]

Can we talk about how that condensation in the ducts comes from the moisture in the cab and molds ability to grow on porous vs non porous surfaces.

Lmao!

[Johnny Dangerr]

Someone remind me in the morning and I will get the answer from the man.............

[doghouse]

I have always been taught to turn the a/c off before starting. I'm nearly 60 so probably doesn't apply to todays vehicles.

[brushtrooper]

Do y'all turn the A/C off before shutting down and/or starting up again? I always have but I wonder if it's necessary. Is there any truth to the ideas of starter wear on start-up or condensation in the ducts after shut-down?

Thanks.

How old are you? I am 45 and that was a thing my parents swore by back on the 70's-early 80's.
No I dont think its relevant this last decade or 2....

[30-30]

I'm early 20s with older parents... A lot of old-school vehicle maintenance policies were drilled into my head at 16.

[Smokeater]

Newer cars it ain't a big deal. I was also taught to turn stuff off back when tho. Still do most of the time.
Just like in a house, to me, humidity is the enemy. I either run it on max or hit the recirculate button as to get the moisture out. Letting outside air in ain't gonna help anything. If it's been running on recirculate or max for a while, moisture left in the system should be pretty low. What little moisture is left will dry out easy enough.

[kornsqueezer]

Never turn off the ac.

[Mike D]

Newer cars it ain't a big deal. I was also taught to turn stuff off back when tho. Still do most of the time.

Just like in a house, to me, humidity is the enemy. I either run it on max or hit the recirculate button as to get the moisture out. Letting outside air in ain't gonna help anything. If it's been running on recirculate or max for a while, moisture left in the system should be pretty low. What little moisture is left will dry out easy enough.

Don't run it on max all the time. That is what causes humidity to build up.

http://mechanics.stackexchange.com/questions/116/why-does-my-a-c-blow-foul-smelling-air-when-it-first-turns-on

[WCB]

In a Texas summer that condensation will evaporate faster than mold will grow. And I don't think I need a study to convince me of that...

[Kokanee]

Compressor clutch will not engage until starter solenoid is discharged and accessory power is engaged. Best to run on outside air for five minutes or so because in cab temps are way higher than outside temps. Then put it in recirculate to pull moisture out of air and duct work etc. (receiver/drier) and conserve energy as inside air is cooler and drier. Condensation is mainly limited to exterior plumbing in engine compartment.

[bluelund79]

Guess I'm doing it wrong.....Dad taught me to turn everything off before turning off the vehicle, still do so today. I ask my wife to do the same, she still ignores me. Kids will do it, or not drive my vehicles.

[CaptainDave]

My old man never told me to turn off the AC before shutting off the vehicle.

With that said, he used to plug a can of R12 every week to re-charge his leaking AC on the old Ram Charger when I was a kid. LOL. That stuff used to be like $2 for a 12 pack case...