I am about to buy my 5th condensate pump in 12 years. HE furnace or 2.5T A/C run 10-11 months out of the year here. Humidifier attached but not in use.
I have a 7.5' rise, 20' horizontal span, then 8' down into my drain from the pump.
Failure modes vary only slightly. For the most part, the pumps will start making noise (varies, but usually a noisy motor type of noise, usually the motor physically heats up until I smell hot electronics), and will eventually stop pumping if not replaced within a month or two. For this reason I keep a spare on hand, and just replace them when they quit entirely. The pumps I've been buying are the standard
$60 $133 120V ones from Home Depot. The make/model varies every time I buy one.
To be clear, my question is on why the pumps might be failing so often. The only thing I can think is that the drain line might have become restricted (furnace installers tied it to rigid pipes with zip ties), making the pump work much harder. It looks relatively un-kinked, but the tubing is opaque. The drain line is exposed and easy to get at, so would be easy enough to replace I suppose, but I wanted to ask here first to see if there are other things I should be checking.
I could eliminate the 7.5' rise in theory, but it'd either be a trip hazard, or a 50' run along the outer perimeter of the house.