"Kinda" Air Conditioing

TXiceman wrote:
When was the last time you cleaned the return air filters? If you pull them, you can take a flash light and look up into the unit and see the evaporator coil. If then are not bright aluminum, they need to be cleaned.

Next, run your fan(s) on high only. Summer heat in AZ needs 2 A/C units to cool the trailer.

With the unit running on high for at least 10 minutes, take an inlet temp reating for the air at the unit and then one at the closest outlet. Use a thermometer and not an infrared temp gun. It will not measure air temperature, but will read the closest hard surface. You want the air temps.

The outlet air should be 18 to 20 degF lower than the inlet temp. If you are in this range, the unit is doing all it was designed to do.

Next, setting the thermostat lower and lower will do nothing to get the unit to cool more or faster. Set the thermostat for about 75 degF and leave it there.

Keep windows and shades closed. Start cooling the trailer early in the morning before you need it.

If you have been on the road, all day in high temperatures, you not oly have to cool the air in the trailer, but also, the walls and furniture. That is a huge heat load and it may take until late in the evening to get the RV cooled down.

The post from mdcamping is not correct.The least likely problem with the unit is low on charge. Also, with the age of the trailer, it most likely has a compliant scroll compressor and it does not have valves like a piston compressor. 90% of the RV A/C problems are generally related t low or poor air flow.

Ken

The op said the out door unit is clean, "I'm going on that info". Reed valves or scroll, compressors fail and systems loose charge, especially when a/c equipment are subject to harsh conditions. I've worked on enough of them.

Sorry you are incorrect

Mike