As #8 reply states , it will drip or run a small stream if the cooling coil temperature and or drain pipe is below dew point temperature . In humid areas a 5 ton unit may produce as much a 10-15 gallons of water in 24 hours . That dew-point temperature is constantly changing as atmospheric conditions change . It's no different than the glass of iced tea causing a ugly stain on the fine wood furniture because of condensation . Some days maybe , some days maybe not , some days all day and all night or maybe not .
It's no different than the glass of iced tea causing a ugly stain on the fine wood furniture because of condensation . Some days maybe , some days maybe not , some days all day and all night or maybe not .
The question is why was it not dripping when cold ac was on during summers before?
something is not right here.
Well, you probably just missed it or just didn't look on a more humid day. If it is the ac condensate drain it was dripping. Unless the line was broken or clogged and it was draining into your attic or a wall.
where is main drain line?
The main drain line might run down a side wall and terminate just above the ground or it could be directed into a rain gutter on the house which you might not be able to easily see from the ground. The secondary drain line which is what is probably in the picture is the emergency overflow and will have water coming from it if there is a problem with the system or the main drain line is clogged. The emergency drain line is generally placed like yours over a window where it will be easily seen. Sometimes (lousy installation) the emergency drain line will be tied into the main drain line. Find the main drain line and check for blockages. The system may possibly have a problem which has caused the emergency overflow.where is main drain line?