My company mainly focuses on small refrigeration units and walk-ins. Although we do offer service and/or Replacements on air conditioning systems, it’s only 1/3rd of the whole show so, I’d be a liar if I said that I don’t rely on my technicians in this particular arena.
That being said, I recently installed a new 4/5 tone, two stage Dc inverter condenser on my personal residence. For a NUMBER OF REASONS but, 2nd in line reason is because I wanted some first hand experience with one before pitching them as the best thing coming down the pipe right now to our client base.. Experience and a solid working knowledge of and with the products you work on and/or sell is paramount, in my Opinion.
I hope the details I’m providing that surround the situation help you guys in understanding my problem.
So, I removed an older 13 seer, 5 ton Goodman Condenser that just seem to run & run all day. Some days, it literally ran for 18 hours... and not doing a very good job of cooling the home, I might add… the best it could do was 78°.
I replaced it with A 4/5 ton, 2-stage Mr. Cool DC inverter condenser. Coupled that monster to the existing Goodman Air Handler and it too is rated for 5 tons.
Now the new unit is rated at 18 seer at 4 ton and 15 seer at 5 ton. My issue is that the new unit runs only slightly less than the old one. Perhaps 16 hours a day and yet, when checking the power consumption, this new, supposedly more efficient condenser, uses the same amount of power most days and on a few occasions, it will actually use more than older 13 seer Goodman I removed. 😳
In addition to the new (and I’ll give it this; a much quieter operating unit by far) condenser, I installed a Honeywell, programmable, 2-stage thermostat, new line set insulation where necessary & the R410a charge is fresh and perfect, it’s 100% on point!
Non-condensable are Non-existent… pressures and temps are all on the money. I even went as far as to install a pair of perma-gauges for easy monitoring. I mean, that was half the premise for the installation in the first place.
Needless to say, the new condenser’s performance is lack luster and is capable of cooling the house to 74° AT NIGHT! 77°-79° mid day and it’s mid August in central Florida so, yeah it’s hot but, the house is only 2500 sq. ft.
Now, it’s old as all get out, so I’ve considered the possibility of leakage, I thought at one point that maybe a critter had chewed a hole in the Duct work under the house or maybe the line set wasn’t properly insulated.. but those have all been ruled out… and I am gravitating towards the new condenser itself having some issue, a lack of performance for some reason…
I’ve checked operation, it’s definitely NOT set to run at 4 ton, the dip switch is in the 5 ton sequence.
I’ve cleaned the evap, twice… and replaced all the filters.
I’ve never once received a bad condenser straight from the factory. Have any of you? Because that’s where I’m leaning next or…
Do you guys have any ideas as to what could be the cause in the lack of performance and the considerably higher usage of electricity?