Water not draining out the back

drain pan and if hose is to high water will back flow

most window units use the water in pan and throw it upon condenser which evaporates it. need to check if its level side to side with a slight tilt to the back in window.

From everything you described, it sounds like more water than usual is collecting in the drip fan. Despite the unit draining out the rear drain hole. Check the drain hole to make sure it is totally clear and not partially clogged. A pipe cleaner works well to do this. Be sure to turn the unit OFF & unplug it, before working on it.

Hope this helped you and tanks for choosing FixYa.

No drain holes on most units that size

The water gets from the front evaporator thru
a small hole you can not see

Then it finds it's way to the outside or back on the
bottom metal pan

It is evaporated by the condensor fan

It may drain out over the rear pan lip, if
it gets alot, but no drain hole is necessary

You can angle the unit down at the outside or
rear & you can drill a small hole, but it uses the water
to cool the condenser

The window unit needs to have a god tilt on it aiming it outside,and remove the unit and clean the unit out with a water hose ,make sure the bottom of the ac unit has all the debris removed.

After reading over the Owner's Manual for your unit, I wonder if you are operating it in the Cool & Dry Mode. If that's the case, the dehumidifier is in operation, which would account for having to drain the unit every 2 to 3 hours. Ideally, the Cool and Dry Mode should only be operated for about an hour, when the unit is first started . Removing the humidity will allow the AC function to cool more effectively. But, it is not necessary for it to remain in Cool & Dry mode all the time. Because the AC itself unit will remove some humidity too.

Hope this helped you to troubleshoot and solve the issue of having to drain the unit every 2 to 3 hours

There should be a drip tray that catches all the condensation and funnels it out the back. Check for holes, cracks or a plugged drain hole.

window units slide into an outside frame section
there is a hose attachment area at the back of the ac unit proper that a hose can be attached to
and there should be a section in the frame that allows the hose to be fitted to that ac unit proper
the unit should be mounted so that it actually slopes slightly down at the rear so water can collect at that drain point
there are adaptors that should have come in the packing box for hose attachment
if not, many people use white poly piping or electrical conduit with suitable elbows to collect the water at the hole and pipe it back to the wall into a bucket and the collected water used to water plants and gardens

Leave it alone. DO NOT attempt to create a drain. As long as a window A/C unit is installed properly, (angled slightly down toward the rear) it will drain excess water over the rear lower lip of the unit should it get that high. Many models use some of the collected water/condensation. It gets lifted up by the fan blades to cool the coil.

Haier Air Conditioners do not have a drain hole or hose like most A/Cs. This problem can easily be solved by carefully drililng about an 1/8 or 1/4 inch hole in the bottom outside edge directly on the metal frame, around the cooling fins.... This will elt the water drain out...if you when outside and looked in while it was spitting you would see the water pooling up in there. Haier expects us to mount these units at an ungodly angle to drain the water, but drilling a small hole will help (really anywhere in that bottom plate would work since the whole bottom is a "drain pan"