Good Sam Club Open Roads Forum: Tech Issues: Intermittant A/C
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beemerphile1

Ohio

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Joined: 04/20/2007

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Posted: 04/08/20 05:46pm Link  |  Quote  |  Print  |  Notify Moderator

rockcandymountain wrote:

My Dutchman Denali 5th Wheel has a Dometic Roof Air Unit

Almost all of the time, it runs just fine.

Every once in a while, it will shut off and restart at what sounds like a slower fan speed. Then after a minute or two it will shut off again and restart at normal fan speed. Its almost like the rig is getting a drop in power from the pedestal but I have no way of checking that.


That is exactly what they do with the fan set to auto. Read the manual.

When mine starts to hunt the perfect speed like you described I change the fan to low speed. It's usually in the evening when the outside temperature is dropping, later on I change it back to auto fan.

Nothing is wrong - no worries.


Build a life you don't need a vacation from.

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A1RVTraveler

North Carolina

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Posted: 04/09/20 05:01am Link  |  Quote  |  Print  |  Notify Moderator

I have the exact same system. Same problem with the afternoon sun.
Put the thermostat in high or low for a few hours until the sun gets lower and problem is solved. The system is trying to settle on low speed but then the rig warms up and it goes back to high. It takes about 5 seconds for the motor to change speeds. It does cycle from low to off and then to high.

TomG2

Central Illinois

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Posted: 04/09/20 05:35am Link  |  Quote  |  Print  |  Notify Moderator

Mine did this mostly on cooler mornings. It thinks it needs to cool,but gets confused. Repositioning the thermistor in the airflow has been suggested. I got a Coleman.

The fan speed upshift and downshift is normal and depends on whether the room temperature is within four degrees of target temperature. Over four, it goes to high. Within four, it goes to low.

wa8yxm

Wherever I happen to park

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Posted: 04/09/20 06:18am Link  |  Quote  |  Print  |  Notify Moderator

"It is almost like the rig is getting a drop in voltage"

WHY I have a surge guard (well one of several reasons)

Advantage. Both the TRC/Southwire Surge gards (Which is what I have due to a fantastic sale price) and the Progressive Industries EMS units the remote (Optional on the TRD) for the hard wired or the display for the plug in shows both Volts and amps on both lines of a 50 amp (just one on a 30).

Now.... Mine has protectd me against (So far)
High voltage (There is a weak neutral on the sight I'm on now)
Short term failure (Like one or two seconds)
Open Ground (Park had to fix that one)

Just to name 3 conditions the unit protects. Low voltage is also covered one and open neutral.

Plus.. No matter what folks tell you there is a 240volt outlet that looks a whole lot like a TT-30.. and in fact a TT-30 will plug into it.. That's covered too.. I've never done that (yet) but I have seen one such outlet.... (I had to look for it someone told me it existed but I already knew it was 240 volt)
(He called it 60 amp, in the breaker box were two sets of 60 amp breakers, both ganged, so I knew the 60 amp outlets were 240 volt).


Home is where I park it.
Kenwood TS-2000 housed in a 2005 Damon Intruder 377


rockcandymountain

Maple Valley

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Posted: 07/26/20 07:02pm Link  |  Quote  |  Print  |  Notify Moderator

I had forgotten I had posted this back in April when we last used the 5'er. On this trip, our first one since April, the same thing happened. I had not thought about the electric hot water heater and the refrig pulling amps. Both are on Electric. This particular campground is old and only has 30A at the pedestel. I haven't checked it yet but I will bet its getting hot. Because it tripped out earlier and I reset it and it tripped out again shortly So I let it sit off for 30 min or so and it seems to run ok. But, off goes a few electric items when I use the AC. Plus I will have it checked when I take it in.

wa8yxm

Wherever I happen to park

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Posted: 07/27/20 05:48am Link  |  Quote  |  Print  |  Notify Moderator

I doubt this is your issue but.. it might be.

When my Rig was new and I mean NEW sometimes one A/C would work, Sometimes Both, Sometimes the other, Sometimes neither.. I decided to Tribble shoot before returning to dealer.
First stop was the main breaker box (Power distribution panel is the proper name) and one of the screws holding one of the wires took over THREE FULL TURNS to tighten down.

A/C's worked perfectly after I got rid of my loose screws.

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