Condensation What is condensation?

Model number always helps
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Condensation is the change in matter of a substance to a denser phase, such as a gas (or vapor) to a liquid.[1] Condensation commonly occurs when a vapor is cooled to a liquid, but can also occur if a vapor is compressed (i.e., pressure on it increased) into a liquid, or undergoes a combination of cooling and compression. Liquid which has been condensed from a vapor is called condensate. A device or unit used to condense vapors into liquid is called a condenser. Condensers are used in heat exchangers which have various designs, and come in many sizes ranging from rather small (hand-held) to very large.
The water seen on the outside of a cold glass on a hot day is an example of condensation.

Well...they are kinda the same. The condenser is where the refrigerant is condensed from a gas to a liquid. When in AC mode this happens outside at the AC unit. (You ever put your hand over a running AC unit in the summer? Feels warm!). When in Heat Pump mode the process is reversed. Instead of condensing the gas to liquid outside (which creates heat) the condensing happens inside and helps warm the building up (with the help of the fan of course). So essential the condenser is where the gas is condensed into a liquid, which creates heat. A heat pump can reverse the direction of the flow and cause this condensing to happen either outside or inside.
This is a very watered down version of what happens but I hope this is sufficient for what you are asking.

Hello, if the unit has a drain it may be blocked and not allowing the water to drain. If no drain is present then the unit uses the condenser fan blade to scoop up the condensate and splash the condenser. This is done for two reasons, to keep the condenser cool and to evaporate the condensate

Hello, some window units do not use a drain tube instead they use the condenser fan blade to scoop the condensate from the bottum of the base pan and splash the condenser coil to keep the condenser cool and also evaporate the condensate. Most of the time you can hear a "swishing sound"

Hello, most window air conditioners evaporate the condensate by the fan picking up the condensate and splashing the condenser, since the condenser is hot it will evaporate the water as soon as in comes in contact with the condenser.

From the manual:

The Control Center monitors refrigerator and

freezer temperatures as well as the ice maker

system. If there is a temperature or ice maker

problem, you'll be alerted by a flashing

SERVICE indicator light. This same SERVICE

light will also flash if the condenser needs

cleaning. Before calling for service, please

check and see if your condenser area needs

cleaning. Refer to Condenser Cleaning,
page 22.

CONDENSER CLEANING

In all Built-In models, the condenser is located

behind the grille. First, remove the grille. Then

using a soft bristle brush, vacuum to remove

dust and lint from the condenser. NOTE: To

avoid bending the condenser fins, be sure to

vacuum in the direction of the fins (up and

down). Clean the condenser area every three

to six months.

CAUTION

Before cleaning the unit, shut the electricity

off at the control panel. When you

clean the condenser, wear gloves to avoid

injury from the sharp condenser fins.

Failure to clean the condenser could

result in temperature loss or mechanical
failure or damage.

Insulating it might work and may be relative. The condenser is the place the where condensation takes place, where refrigerant gas turns back into liquid under pressure. Outside temperature plays an important role in the condensation of refrigerant and if it is too cold, of course, condensation may not take place normally. You need to reduce the flow of air through he condenser fins by disconnecting the condenser fan. Disconnecting the fan will cause a rise in temperature and presure in the condenser that may be conducive to better condensation providing the garage temperature is very cold; the cold air in the garage will be enough to keep the condenser from overheating.

On the other hand, you can install a simple temperature sensor on the condenser fins that can control l the fan. Fan would turn ON when condenser temperature is too hot and OFF when ambiant air around the condenser is too cold. The best temperature sensor is one with a sensing bulb and one that can be adjusted. With a little know how you can solve this issue. It will work if you use the right temperature controller. Remember that all you need to do is o connect the temperature controller on the condenser fan circuit. Provided that you know "Control" this should be easy. Get help if needed.

We recommend vacuuming your condenser every 3 - 6 months. Cleaning the condenser is important for the overall operations of the unit including cooling functions. A dirty condenser may lead to warm temperatures in the refrigerator and freezer. It may also cause the unit to run excessively. It may contribute to condensation or frost inside of the compartments. If the condenser is not cleaned properly it may even cause premature failure of mechanical components in the unit. Condenser Cleaning - All Models Before cleaning the unit, shut the electricity off at the control panel. When you clean the condenser, wear gloves to avoid injury from the sharp condenser fins. Use a soft bristle brush and vacuum to remove dust and lint from the condenser. To avoid bending the condenser fins, be sure to vacuum in the direction of the fins, up and down. Clean the condenser every three to six months or sooner if you have pets. 600 Series Framed and Stainless Steel louvered grilles: First remove the grille screws located at the bottom of the grille. Tilt the top of the grille forward and release the springs from behind the grille, then lift off. Overlay Panel Grille: To remove, lift up then pull out at the bottom and down to release from its mounting bracket. Remove the two black screws in the lowest louver of the grille. Tilt the bottom of the grille out and away. It will release from the top of the grille. Model 601RG Stainless Steel Grille: Remove in a similar fashion as the overlay grille panel. 700 Series All Units: At the bottom of the unit, remove the four screws holding the kick plate/grille in place. It will then slide forward, giving you access to the condenser area. 400 Series 424/424FS At the bottom of the unit, remove the screws holding the kick plate. The condenser is located behind. 427/427R: Remove the four screws holding the kick plate/grille in place. It will then slide forward, giving you access to the condenser area. 430: First remove the screws located at the bottom of the grille. NOTE: These screws (Phillips head) are accessed with the door open. Tilt the top of the grille forward and release the springs from behind the grille, then lift off. 200 Series 245, 249, 315W Remove the kick plate at the bottom of the unit, giving you access to the condenser area.

The condenser is part of your air conditioning system. Hot high pressure freon gas from your air conditioning compressor will run through your condenser to dissipate heat and condense into a liquid.
The condenser is not in the radiator but looks like a small version of your radiator mounted either in front of, or behind your main radiator.
If your AC works properly and doesn't leak, then you don't need a condenser.