This refers to a central a/c unit. It’s been a hot week in NJ recently, but it’s not like the first time the a/c was running either. Here’s what has happened just in the past week.
Monday: whole system conked. HVAC repair guy came down, replaced capacitator, and the system went back on.
Tuesday: system went off at around the same time there was a blackout in the area. After power was restored, it did not go back on. Found the lower drain pan (on the floor, under the entire system) full of water. Apparently turned off via overflow sensor/shut-off switch. Sucked it out with a shop-vac and it went back on. By next morning (Wednesday), it was almost full again - apparently the condensate pump is not working. Replaced that pump.
The pump is clearly working, but there is still water leaking out somewhere. This morning (2 days from the last time it was emptied) the lower pan was full again, and needed another vacuuming. I can see water dripping out of the system, though some is also going into the pump and being pumped out. There’s a seam about chest high between an a/c panel and (what I believe to be) furnace components below. There’s a layer of silicone caulk sealing it at the bottom edge, but there’s one hole in this silicone layer, and water is bubbling out through this hole. Significance of which is not the water from that hole itself, but that it appears that there’s some leak somewhere behind that panel, possibly the upper drain pan.
I’m thinking of taking off the panel on Sunday and taking a look. But I’m also puzzled by what seem to be a bunch of unrelated issues arising at the same time. FWIW, this is a pretty old system as a/c systems go (24 YO), so it doesn’t surprise me if things go in the same season, but all at the exact same time seems unusual, and I wonder if there’s some underlying issue which could cause all of this.