Humidity in TM

[klpauba]

Padgett, your assessment is probably more on target -- I see that daveinfl is, in fact, from FL (now I see it!). When he says "hot and humid", he's comparing it to FL, not the northeast. So I suspect he had plenty of cooling load to keep the compressor going for more than 15 minutes for each cycle.

Still, a 1-ton A/C for basically a one-room home (of less than 100 sq ft) is oversized -- especially with the heavily insulated TM.

[Larryjb]

Originally Posted by daveinfl

We keep ours on low cool. We have never had it freeze up on us. And again, we keep it on a moderate temperature. One more thing. Just by the nature of the beast, the TM has areas where that humid air from outside can get in. Try and find those places (like along the edge of the beds). Some people actually put "noodles" along the edge of the beds. We roll a beach towel and lay it along the edge. But look for some of those places. That will also cut down on the humidity. But above all else .... Be a happy camper!

I know this thread is a couple of years old, but I did have my AC freeze up a couple of times in Kamloops BC. It's not that humid either. I can't remember the exact settings it was on, so I'll pay attention to it in the future.

[Padgett]

Never had mine freeze up and Florida tends to be humid. Was told that freezing up is a sign of low Freon.

[Larryjb]

I could see that. I suspect the times it froze over was when the fan was on low but the cooling on high. It never seemed to freeze as long as the fan was set on high. I'll see what happens next summer if I set the cooling to low when I want the fan on lower.

I'm not sure if anyone would want to service it at this age (16 years old at least), or if it would be worth servicing.

[Shane826]

It's my understanding that RV rooftop A/C units are sealed and can't be recharged like your home or car A/C.

[Larryjb]

Mine is one of the last side AC units. I actually removed it to clean it up. It was pretty ugly inside!

[tentcamper]

Freeze up indicates low freon. Now if you freon is low you might not get freeze up by moving more air or lower humidity. But by design an AC unit freon should never get below about 36F. It has been a common practice in low humidity areas for HVAC tech to run AC units with lower freon than factory specs to maximize cold air. But if humidity increases they will freeze up.

[Larryjb]

Thanks,
That makes a lot of sense. I'll see how things go.

I remember reading that if you have an older AC that doesn't have all the electronic controls, it's worth it to have fixed. So, I may see if there is anyone who does repair the window mounted AC units sometime.

[Cynical]

I know this is an old thread, but freezing up is not just a sign of low freon. In this case the salesman was right, sort of. If in extremely hot/humid areas you should always leave the FAN on high when running your unit or it could freeze up. The added volume of air flow on the high setting helps keep the thing from freezing, kind of like using fans in the orchards to circulate air on sub freezing nights.

Had it happen in my 5th wheel in FL, fortunately for my dog, it did not shut down until just before I got home! Always left the fan on high after that and never had a problem again. Now they have monitors and apps that can notify you of such things, but back then, not so much.