Posted by OH Boy on September 14, 2019 at 18:57:10 from (174.232.4.59):
In Reply to: OT: HVAC? posted by Geo-TH,In on September 14, 2019 at 04:31:52:
Air can flow either way through the A coil. There are plenty of systems that are downdraft where the A Coil is mounted on top and air flows from the a-coil down to the blower. The main problem with this arrangement is the blower motor can be cooled down so much that humidity condenses on it. So, it is better if the blower blows the air through the coil instead of sucking it through.
You need to clean that A coil to assure that air is flowing through it freely. Spray it with some of that scrubbing bubbles stuff.
In addition you need to make sure the drain pipe is clear. Blow through it to ensure its not blocked up.
The drain needs to have a trap on it. If air is allowed to suck back through the drain pipe it pulls the water back with it and it will quickly overflow the drain pan.
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