Question about air conditioning

[dvitale300]

Hi everyone!

I have a 30ft TT (about a month old) with a 13500 rooftop air conditioner. I am noticing that if it is humid outside the air conditioning doesn't seem to work very well. Is this normal for this type of air conditioner, or do I have a problem that needs to be addressed.
Thanks

[rockhillmanor]

TomG2 wrote:
Remember that

air conditioners do their best job of dehumidifying

when they are running. Oversizing can results in cool damp air in the trailer as it cycles off more often. A couple of other tips: Cover the floor vents with carpet or magnetic covers. Cool air falls. Get a fan. Even 80 degree air feels cool in a breeze.

When I am in Florida I add a small portable dehumidifier per advice from the local mobile repair guy there.

You will be 'amazed' how much colder your RV will be if you add the dehumidifier to help the ac do it's job. And twice as amazed when you see how much water it takes out of your RV that your ac is unable to do by itself!. Henceforth a much cooler RV!:W

[CavemanCharlie]

I'm curious what is the brand name of the Air Conditioner ?

[TomG2]

Remember that air conditioners do their best job of dehumidifying when they are running. Oversizing can results in cool damp air in the trailer as it cycles off more often. A couple of other tips: Cover the floor vents with carpet or magnetic covers. Cool air falls. Get a fan. Even 80 degree air feels cool in a breeze.

[rockhillmanor]

Bayoubass wrote:
As for keeping the coils clean ( a must for your unit to work its best)just buy a can of coil cleaner at Lowes for a few bucks and spray them every few months to be on the safe side. Easy to do and not messy.......

Never heard of that product!
Could you post the name of it? Tks.

[Bayoubass]

As for keeping the coils clean ( a must for your unit to work its best)just buy a can of coil cleaner at Lowes for a few bucks and spray them every few months to be on the safe side. Easy to do and not messy.......

[Major_Dad]

AJR wrote:
I have never camped in West Texas. But a 13500 BTU unit on a 30’ TT sounds light to me. If the unit has ducted AC you could try opening the ceiling vents on the AC unit for a rapid start of the cooling process. Once the area under the AC unit is cool you can close those vents to reduce noise.

We had a 29' TT and spent 7 summers out west. Even the 15K unit could not keep up in West Texas/southern NM. Our first night on the road from San Antonio to Balmorhea SP was nearly always miserably hot inside the trailer. Our new trailer (33.5') has much better insulation and 2 a/c units, and we no longer have that problem.

[AJR]

I have never camped in West Texas. But a 13500 BTU unit on a 30’ TT sounds light to me. If the unit has ducted AC you could try opening the ceiling vents on the AC unit for a rapid start of the cooling process. Once the area under the AC unit is cool you can close those vents to reduce noise.

[rockhillmanor]

dvitale300 wrote:

rockhillmanor wrote:
Check the coils. They most likely need cleaning. Makes a big difference when they are cleaned.

Even on a brand new trailer 2 months old?

Depends where you are parked.
I RV'd only in the midwest. When I headed south with all the humidity, green mold and pollen, yes within a couple months my coils where covered.

I sure didn't know anything about this either until the ac couldn't keep up and RV mobile repair showed me. Just thought I'd share my experience.

How you find out a simple repair for yours.

[GaryWT]

I find that in hot humid weather the first night is somewhat tough but I leave the AC set at about 64 so it will cool overnight and then hopefully it is cold enough to maintain a nice temp the next day.

As other have said, keep everything closed, there is enough air getting in each time you open the door.

[cbshoestring]

itguy08 wrote:
Just curious - if running the A/C why any venting at all? That may be the majority of your issues - too much warm air coming in.

X3

Maybe a prior tent/popup owner, where you always open "something" if you don't want the condensation to rain on you.

Let the AC remove the condensation for you....crank it up & close the windows.

[valhalla360]

If you've been driving and the air inside is substantially hotter, consider opening all the windows and hatches for a few minutes before turning the a/c on. On a 80 degree day, it might be 120 inside, so a quick flushing of the air will give a quick boost to the cooling process.

[Old-Biscuit]

itguy08 wrote:
Just curious - if running the A/C why any venting at all? That may be the majority of your issues - too much warm air coming in.

Exactly.

RV A/C Unit sucks up inside air..cools it and discharges the cool air back inside RV.

It can only cool the inside air by recirculating the already cooled air.

Opening a vent/window etc. just lets already cooled air out and hot moist air in.
Sorta like standing in front of fridge with door open and wondering why fridge isn't cooling down.

Set t-stat for 72*F
Turn A/C ON....Fan on Auto
Let it run

[itguy08]

Just curious - if running the A/C why any venting at all? That may be the majority of your issues - too much warm air coming in.

[dvitale300]

rockhillmanor wrote:
Check the coils. They most likely need cleaning. Makes a big difference when they are cleaned.

Even on a brand new trailer 2 months old?