Air conditioner struggling

kaydeejay wrote:
... but if the OP is only getting down to 77, then he still has issues/

Maybe, maybe not. The OP has provided so little information it would be impossible to analyze at a distance just why he's not getting the cooling he's expecting. Right now we're experiencing the hottest weather we've had this year here in S Ontario where the OP is located and no doubt everyone camping this weekend that has a rig with A/C is running it full tilt. If we assume his camper is currently sitting in an Ontario provincial park campground the run to the campsite power post could be quite long, easily 100' or more not being uncommon so voltage drop could be significant ... but he hasn't provided this information. Neither has he said anything about what the source voltage actually is, both unloaded and loaded, nor has he given any indication as to what else might be running in the trailer as well as the A/C. He hasn't said exactly when the A/C was initially turned on so we therefore don't know what heat load it may initially have had to deal with, other than to say the trailer was sitting in full sun at the time. A trailer this size, with a 29' box, most likely has a ducted A/C system which can easily not distribute cold air evenly throughout the rig as one would like, often the nature of the beast which can be quite difficult for any dealer to improve upon. None of this is to say he doesn't have an issue with his A/C but this is a 2015 trailer so statistically it's not likely ... rather, it's quite possible the A/C is performing as well as it can under the circumstances and he's just expecting too much from it.