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Old 01-10-2009, 11:57 AM   #1
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A new problem has appeared on our 2000 Adventurer 37G. The basement air conditioner works great, most of the time. But it appears that at night it sometimes stops blowing cold air, and just runs and runs, no cooling. We keep the hall door closed, to keep the cats out of the bedroom. Could this reduce the air flow enough to be a problem? Or should I be looking for something else?

Thanks for all answers.
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Old 01-10-2009, 02:30 PM   #2
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Are the compressures still runing if they are then the unit is probley iced up do to low air flow. If comps are not on then the thermostat is not calling for cooling. hope this helps.
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Old 01-10-2009, 02:35 PM   #3
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I am not fully aware of where your return is in your MH but, in mine, the return is thru the side of my bed. If I closed the bedroom door, it will effect the effectivness of the air conditioning --- the air return would be blocked from all of the coach except for the bedroom area. This could cause the unit to freeze up due to low air flow.
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Old 01-10-2009, 05:33 PM   #4
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I have so much space under my doors between the BR and Bath that there would be no restriction.

If you drop the numbers on the thermostat will the compressor kick on? It may be, as said above, that the demand has been met and the compressor just will not kick in.

Not sure where the thermostat is in the 37G, but when you close a room off, that room will get cooler than the other rooms because the return does not suck the cold air out as fast. If the thermostat is in the LR and the return is in the BR, it may be that it is cold enough in the LR and the compressor will not kick in.

I use the "Auto" mode and when the compressor kicks off the fan kick off with it. It took a little getting used to, but after the first couple nights we slept fine.
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Old 01-11-2009, 06:42 AM   #5
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I close my bedroom door for the same reason, the cat. I have not had a problem with my A/C on auto at all.
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Old 01-11-2009, 10:08 AM   #6
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I also close my door when we have others in the coach. I haven't noticed and ill effects from doing so.
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Old 01-11-2009, 02:07 PM   #7
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We close off the doors in our trailer and, depending upon the circumstances, may close the heat or a/c vents off in various spaces. I have replaced all of the vents with ones that can be closed. This is one of the best little mods I have done.
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Old 01-11-2009, 05:16 PM   #8
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The AC air return is under the bed. Closing the door will interfere with the air return.

-Tom
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Old 01-11-2009, 08:36 PM   #9
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We have a 2000 Adventurer 37G. Dh and I almost always sleep with the bedroom door closed since our teenaged son sleeps on the sofa-bed in the living room. We run the A/C on auto quite a bit, and we've never noticed a problem with the A/C and the air return. I'm not saying that's not your problem, but just that we haven't experienced it ourselves.

ETA: I'm trying to figure out how to make my siggy photo big like yours.

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Old 01-12-2009, 05:02 AM   #10
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Tom N. is correct in that the main supply of air to the basement air is under the bed. However, WIT must have factored this as there is plenty of air space above and below the sliding door to feed the A/C. You can also crack a window in the bedroom and achieve the same thing.
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Old 01-12-2009, 07:04 AM   #11
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Thanks all, for the responses and the information. Some things I've considered - There's no open space at the top of the door (at least on mine), and the gap at the bottom is only about an inch and a quarter. Not much space for return air. Opening a bedroom window still doesn't solve the air flow problem, as you still have the positive air pressure in the living/dining area for the fan to overcome.

I had noticed in my searches for this problem that some one stated that most air conditioner problems (especially freeze-ups) were related to low air flow. And it's usually a restricted intake (filter or obstruction), a cross-over in supply ducts, or a restricted outflow.

Am still working on isolating the problem (maybe a combination) and will post when I've been able to correct it.

Thanks again for all the help.

What a great forum.
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Old 01-12-2009, 07:18 AM   #12
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Quote:
Originally posted by glarnold:
......it sometimes stops blowing cold air, and just runs and runs, no cooling.
How low are you setting your thermostat? When this occurs, have you looked at the thermostat setting? The window normally shows the "ROOM" temp. You must tap the up/down button to see the "SET" temp. If the room temp is at or below the set temp (on cooling) and the fan is set to "RUN" the thermostat is satisfied and the compressor(s) will not operate.
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Old 01-12-2009, 07:36 AM   #13
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There are other paths for the air to get back to the bedroom. Mine has vents in both bathroom walls, about 8" square, that let air pass back to the bedroom. The in floor heat ducts would also pass air if the differential pressure is large enough.

Don't think you need to worry about it. Problem must lie elsewhere.
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Old 01-12-2009, 07:47 AM   #14
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If you close the bedroom door, you need to closely monitor the unit and make sure you do not get to a freeze up problem due to low air flow. With the main air return in the bedroom and very few air outlets, it will most likely reduce the air flow tot he unit and possible cause problems. To get an idea of how much restriction we are talking about, close the door down to about 6 inches gap and slowly close it from there. You will feel the velocity increase through the gap.

You can either cut off about 4 inches from the bottom of the door or install a vent in the door which is roughly equal to the units air intake grill.

I would not depend much on the bypassing through the heating ducts.

Ken
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