WSGraffius
Member
AC a\Air Flow Problem Solving
Thanks to all for your posts on this topic, I've taken my unit back to the dealer today for a warranty repair of the problems with my ac. From your posts I spent the weekend inspecting my duct openings, ac unit housing and main duct trunks and found some interesting items that might help you cure some of your problems. First, when I took down the grilles on my duct outlets I found the space between the ceiling and duct trunk was sealed with foil tape, applied in a vertical fashion, the tape ends had curled up from the duct board and virtually sealed off most of the airflow from my seven vents. I pressed this back down and proceeded to check my duct trunks. With the vents removed I inserted a small flashlight upstream from one opening and shined the light back downstream. Then I inserted my digital camera lens and captured the internal views of the trunk to inspect for collapse or shoddy craftsmanship, none found here. My last plan of action was to inspect the ac unit housing where I found several problems. The door-side supply trunk was 50% blocked by insulated tape (1/" thick) and there was a hole that crossed over from the supply air to the return air side which probably returns any supply air back to the ac unit. In addition the roof membrane was cut to leave excess for sealing but was never secured to the side walls and probably cut the supply another 5-10%. The street-side of the unit was better but contained the same issues but on a smaller scale.
My dealer was interested in the B/W copies of my pictures and eager to make this right. We'll see how he does before I try the “tent trick” .
I've placed some pictures on here (I think) in order for you to understand my verbage.
Thanks to all for your posts on this topic, I've taken my unit back to the dealer today for a warranty repair of the problems with my ac. From your posts I spent the weekend inspecting my duct openings, ac unit housing and main duct trunks and found some interesting items that might help you cure some of your problems. First, when I took down the grilles on my duct outlets I found the space between the ceiling and duct trunk was sealed with foil tape, applied in a vertical fashion, the tape ends had curled up from the duct board and virtually sealed off most of the airflow from my seven vents. I pressed this back down and proceeded to check my duct trunks. With the vents removed I inserted a small flashlight upstream from one opening and shined the light back downstream. Then I inserted my digital camera lens and captured the internal views of the trunk to inspect for collapse or shoddy craftsmanship, none found here. My last plan of action was to inspect the ac unit housing where I found several problems. The door-side supply trunk was 50% blocked by insulated tape (1/" thick) and there was a hole that crossed over from the supply air to the return air side which probably returns any supply air back to the ac unit. In addition the roof membrane was cut to leave excess for sealing but was never secured to the side walls and probably cut the supply another 5-10%. The street-side of the unit was better but contained the same issues but on a smaller scale.
My dealer was interested in the B/W copies of my pictures and eager to make this right. We'll see how he does before I try the “tent trick” .
I've placed some pictures on here (I think) in order for you to understand my verbage.
