If by "exterior overflow drain" you mean a pan external to the AC coil and ducting (often installed on a horizontal attic crawlspace unit), and if there's water filling that "exterior overflow drain," then it would be likely that the coil's own drain pan has formed a leak. If the evaporator coil is older than 10 years, it probably was made of sheet metal rather than plastic, and so it may have rusted through in a location not readily visible.
It has to drain the condensate buildup somewhere... Some drain directly into the homes plumbing and only drain outside the home when the inside line has plugged up, like an overflow pipe.
When air is cooled the water in it comes out (like mist forming on the outside of a class filled with cold coke) and this happens in the air conditioner. Normally the dripping water is drained way to the outside (or a drain) by a pipe. If the pipe gets blocked the water will overflow and the conditioner will leak water - get it serviced.
Water dripping from the freezer into the fridge is usually caused by a clogged or frozen defrost drain. This can happen when ice builds up in the freezer and blocks the drain, causing water to overflow into the fridge.
Yes, it is normal for an exterior AC drain pipe to drip water as it is a sign that the air conditioning unit is functioning properly and removing excess moisture from the system.
To unclog the overflow air conditioner drain, first turn off the power to the unit to ensure safety. Use a wet/dry vacuum to suction out any debris or standing water from the drain line. If that doesn't work, try using a mixture of vinegar and water or a commercial drain cleaner to break down any buildup in the line. Lastly, check the drain pan for blockages and clean it as necessary.
Common causes of overflow in a bathroom sink with overflow include a clogged drain, a faulty stopper or drain plug, or a malfunctioning overflow drain system.
To determine if your tub is leaking from the overflow drain, fill the tub with water and observe if the water level rises above the overflow drain. If water is leaking from the overflow drain while the tub is filled, then it is likely that the tub is leaking from the overflow drain.
To stop the dripping noise from your air conditioner, you can check and clean the condensate drain line, ensure the unit is level, and replace the air filter if it's dirty. If the issue persists, you may need to contact a professional for further inspection and repair.
Your freezer may be dripping water into your fridge due to a clogged or frozen defrost drain. This can cause excess water to accumulate and overflow into the fridge. It is important to address this issue promptly to prevent further damage.
The overflow tube is clogged is my first guess, unless someone or something has cracked the drain tube with activity in the area.
The overflow is built into the sink, it is not part of the drain. If there is no overflow, you can not add it.
The purpose of an overflow drain stopper in a bathtub is to prevent water from overflowing and flooding the bathroom by allowing excess water to drain out through the overflow drain instead.