My yearly ritual. Close neighbor's contractor generated lots of limestone dust & mortar mix that wafted over where the outside unit was located. Sprayed down outside coil with a whole can of TuffStuff. Next I sprayed the indoor A-frame coil, letting both soak while I went to purchase new 3M filters. Too bad Lowe's no longer sells these better quality filters in a single. Now have to buy two bundled together. I prefer 3M filters because their pressure drop is quite a bit lower than Purolator's equivalent filter.
Got back and used a pump up sprayer to rinse both coils with soft water. Outdoors, I prefer to borrow neighbors pressure washer + wide-fan-tip and backflush the coil. Unfortunately he was unreachable today, it rained 0.3" and now outdoor humidity is 100%.
Removed outer cover on evap. coil and rinsed it from the clean (downstream) side. There was quite a bit of "very fine" dirt. As the coil sweats, this fine dirt turns to mud and will remain in place until this cleaning treatment. Post rinse, the drip tray had lots of this dissolved mud. So I flushed it out from both furthest ends back towards the drain until it was gone.
Upon installation of both new filters, I noticed something very odd. The Air Flow indication arrow appeared to be backwards. Didn't make sense. I'll call 3M Monday. Given the poor fit though, I used some UL-181B/X metal foil tape to seal in both filters preventing air from sneaking around the perimeter.
Buttoned it all up. Indoor air temp had risen to 82°F over several hours. Humidity was probably 42% or so. I set the t-stat to 75F and restarted. Indoors is now 76F and indoor humidity has dropped to 37%. Quite a shock as outdoors it's 78F, dew point is 77F, which means outdoor humidity = 99%. So air flow across the clean evap coil is good, it is cold and sweating, thus indoor humidity has quickly dropped since the restart.
I always notice this drop in indoor humidity after cleaning the evap coil. Before, indoor humidity would be around 41% with t-stat set @ 78F. In humid Cen. Tx., humidity removal (latent heat) is just as important as cooling air (sensible heat).
Very surprised by the rain today. Didn't see it in the forecast. Weather-babe blew it.
Got back and used a pump up sprayer to rinse both coils with soft water. Outdoors, I prefer to borrow neighbors pressure washer + wide-fan-tip and backflush the coil. Unfortunately he was unreachable today, it rained 0.3" and now outdoor humidity is 100%.
Removed outer cover on evap. coil and rinsed it from the clean (downstream) side. There was quite a bit of "very fine" dirt. As the coil sweats, this fine dirt turns to mud and will remain in place until this cleaning treatment. Post rinse, the drip tray had lots of this dissolved mud. So I flushed it out from both furthest ends back towards the drain until it was gone.
Upon installation of both new filters, I noticed something very odd. The Air Flow indication arrow appeared to be backwards. Didn't make sense. I'll call 3M Monday. Given the poor fit though, I used some UL-181B/X metal foil tape to seal in both filters preventing air from sneaking around the perimeter.
Buttoned it all up. Indoor air temp had risen to 82°F over several hours. Humidity was probably 42% or so. I set the t-stat to 75F and restarted. Indoors is now 76F and indoor humidity has dropped to 37%. Quite a shock as outdoors it's 78F, dew point is 77F, which means outdoor humidity = 99%. So air flow across the clean evap coil is good, it is cold and sweating, thus indoor humidity has quickly dropped since the restart.
I always notice this drop in indoor humidity after cleaning the evap coil. Before, indoor humidity would be around 41% with t-stat set @ 78F. In humid Cen. Tx., humidity removal (latent heat) is just as important as cooling air (sensible heat).
Very surprised by the rain today. Didn't see it in the forecast. Weather-babe blew it.