So last posting on portable A/C units was a few years ago. That previous unit lasted 5 years and still works but the bearings in the compressor are not happy and it squeals quite loudly.
The current unit on year 3 is a Haier 14.4 unit.
About a week-10 days ago or so the cold output started going down and by last week, it was only mildly cool as compared to ambient.
Had been hearing what sounded like water dripping (which stopped immediately on turning it off) and clacking sounds like something banging. Also noticed a cold/wet spot on the outside near the handle.
Opened it up, all the cooling fins were covered in a dust mat and the top water tank drain had water coming out when I removed the cap. The day before (Friday) when I detected water, I let it run overnight in fan only mode. Came back Saturday to see STOP on the screen, online see that means tank is full.
Drained tank, cleaned out the dust mats on the both sets of fins, cleaned out the water drain that is supposed to exhaust water out the heat exhaust tube.
The above is after I cleaned off most of the dust mat on top fins, the black stuff at the bottom is wet dust mat.
After a fair bit of cleaning, I powered back on and see one of the refrigerant tubes freezing up, this matches the location near external handle where it was cold and wet.
Using the infrared laser temperature to check the compressor, it’s casing was 52c at the top and 60c at the bottom and still not getting cold air at the cold exhaust or hot air at the hot exhaust.
Put it all back together and crossed my fingers but no change in behaviour. The laser thermometer is showing cold output duct running at 29.6c which is ambient. The insulated foil wrapped exhaust duct is showing 32.7c, typically that would be closer to 37 to 39c when all is working correctly.
So any hope of salvaging this or is it time to add it to the a/c graveyard in the garage?
Thankfully was able to pull out my Convair Westwind Evaporative cooler and that’s making it at least bearable, with adjustments I was down to 27.4c ambient yesterday in the office.