AboutJim Barnhart Expertise Fifty + years in Heating, Ventilating, Air Conditioning, Sheet Metal Manufacturing.
Semi retired since 1995,
Experience Answer questions about , residential and commercial.
Answer questions about sheet metal fabrication.
Fifty years plus experience.
No answers for oil equipment, No answers for kitchen appliances, No answers for laundry appliances.
Question QUESTION: here's one, I'll bet you never heard!! we live in florida,
our air handler is located in the garage. The drain line
to the outside keeps backing up! I blow it out with garden
hose & it goes thru great!! When I stop, it backs up again.. I've done it a hundred times & it still backs up!
It worked a couple years ago, but doesn't now? Thanx, Louis
ANSWER: Louis,
All I know is that water runs down hill no problem unless something gets in it's way,
There is no pressure on a drip pans condensate drain that will push it, it's all gravity flow, If your drip pan has water in it and the drip pan is at least level or slightly sloped to the drain connection and the drain line runs down hill all the way to where it drains and there is nothing in the drip pan or the drain line obstructing the flow then it has to drain.
If your cooling coil, air filter, or drip pan has a lot of gunk it can clog periodically.
---------- FOLLOW-UP ----------
QUESTION: All that makes sense. The drip pan has water in it because
it's not going down the drain. I can look down the drain,
when I put the hose in there. I blast it with the hose,
watching it come out the outside drain, I shut the water
off & watch the drain line fill back up with water? The unit itself is running great. It is only the drain that I'm having trouble with..
Answer Louis,
Can you see the drain pipe all the way from where it connects onto the drip pan to the place where the water comes out?
Are you sure there is no trap/"U" bend in the line between start and finish.
The hose has pressure so it can push through a trap.
Gravity water flow that has no pressure behind it needs a down hill slope all the way, no traps, hitches, etc.
