Every since we bought our trailer almost a year ago, the A/C had a slight tinny rattle when the quick cool air vent on the unit was closed to force more air into the ducts throughout the trailer.
The air coming out the duct work was also not as strong as I thought it should be but...just figured that was the way it was.
On our first outing last weekend we started having trouble with the air conditioner
(after we fixed the problem of no DC power when we arrived at our campsite). It would run for a while with the fan on low and then cut off and not come back on.
Turned the A/C off and let it sit, then back on and it would work for a while and then stop again. At night it shut off so I got up and cracked the quick cool air vent on the unit, mainly to dull the rattling, turned it back on and it ran all night.
When we got home was doing some work inside the trailer with the A/C on and the quick cool vent closed and it shut off again.
Had seen in the forum how to initialize the thermostat from people who had similar problems which seemed like the easy first step. So tried that with no change.
Let it sit then turned it back on and it started working again. Went to open the quick cool vent on the unit and felt cold air coming out of the return air vent...hmmmm...seen a few posts in reference to this as well.
Pulled the return air filter out and low and behold...the sticky edge of the foam insulation on the divider plate that keeps cold air from recirculating into the return air opening had come loose and the divider plate was out of place. This left a hole big enough for me to stick my hand in (I also discovered where the thermostat controller is!?!?)
Put the divider plate back in place, sealed the edges with duct tape (for now) and the unit fired up and didn't shut off. Miraculously the rattling has stopped when the quick cool vent on the unit is closed and the air coming through the ducts is now near hurricane force! The score is still in favor or the trailer, but I'll take this win.