How to Drain Whynter Air Conditioner

Whynter air conditioners are a popular option for home cooling and heating. They come in different sizes, but the most common ones you will find are 5,000 BTUs and 10,000 BTUs. These units should be drained before storage or winter months to prevent damage to the compressor. This post will show you how to drain the Whynter air conditioner!  

The first step is to shut off the power supply by flipping the circuit breaker switch on your distribution panel or fuse box that supplies power to that unit. Next, remove any debris from the condensate pan with a vacuum cleaner. Finally, remove any objects blocking access to hoses located at the back of the unit. Keep reading this blog to know more!

How to Drain Whynter Air Conditioner

10 Reasons Why You Should Drain Whynter Air Conditioner:

1. Prevents Sludge Buildup:

The Whynter air conditioner should be drained to prevent sludge buildup. If you don’t drain it and then turn off your AC, when you turn on your AC again in the following summer, the minerals that settle at the bottom (such as calcium, magnesium) will start circulating into your house once more.

2. Prevents Rust:

This sludge buildup is also a good environment for rusting to take place. Even if your AC is in a garage, you still have to drain it because the air conditioner could get rusty due to moisture and humidity from rain or snow. It can even happen inside, too, especially if your windows leak.

3. Keeps Electrical Components Safe:

Suppose you don’t drain the Whynter air conditioner. In that case, the minerals that settle at the bottom will start circulating again once your AC is turned on, which also circulates all of the gunk through your electrical components too. This can cause damage to them because it builds up over time.

4. Provides Cleaner Air:

If you drain the Whynter air conditioner prevents buildup from circulating throughout your AC system. When this happens, you’ll have better quality air coming out of your vents rather than whatever is at the bottom of your unit’s reservoir tank.

5. Prevents Damage From Ice:

When you drain the Whynter air conditioner, ice won’t build up inside it. However, when you don’t drain your AC unit, and the gunk from the bottom circulates through your AC system again, any minerals or metals in it could potentially cause even more damage to your AC unit.

6. Low-Cost Way Of Protecting Your AC System:

Draining your Whynter air conditioner is a low-cost way to protect your entire AC system. Even if you only do it once in the summer when you are not using your unit, that’s still better than having the sludge buildup circulate through all of your components when you turn on your AC again in the summer.

. Low-Cost Way Of Protecting Your AC System

7. Keeps The Cool Air Coming:

If you don’t drain the Whynter air conditioner, all of that buildup just circulates throughout your AC system once more before coming out of your vents. So you’ll have cooler air coming out of the vents, but it won’t be as cool as what you see in the bottom of your unit’s reservoir tank will circulate through your unit each time you turn it on.

This means that all of the minerals and metals will be circulating throughout your entire AC system, which can cause it to run less efficiently.

8. Prevents Damage From Mineral Deposits:

When you don’t drain your Whynter air conditioner, it will circulate minerals and metals, eventually damaging your AC unit over time. These deposits won’t harm your AC’s performance because they circulate through your components each time you turn on your unit until it’s all gone, but the damage will eventually build up over time.

9. Prevents Your AC Unit From Overheating:

Drain your Whynter air conditioner annually and prevent mineral deposits from circulating through it before coming out of your vents. It does this by allowing most of those deposits to settle at the bottom of your reservoir tank, where it isn’t circulated through your components.

If not drained, these minerals will circulate through all of your components before coming out at the vents, which can cause your AC unit to overheat because so much is being put into it from those deposits.

10. Reduced Water Loss:

Drain your Whynter air conditioner and allow any minerals to build up at the bottom of your water reservoir tank instead of circulating through all of your components. If these minerals were allowed to circulate throughout your entire AC system, they’d eventually end up coming out through the vents. And if this happens, there’s a chance that water will be pulled out through the vent instead.

Steps to Follow: How to Drain Whynter Air Conditioner 

Follow the steps below to learn how to drain the Whynter air conditioner.

Step 1: Unplug the Air Conditioner

The first thing you should do is unplug the unit from any electrical outlet. The drain pump filter will have a large cap that needs to be removed before removing the water inside your unit.

Step 2: Remove Drain Cap

Once you have unplugged the AC, remove the front cover to access where the water is held after being drained from the AC. When removing this large-cap, do so slowly and carefully, trying not to spill any water out of your AC unit. The more extensive section will rotate counterclockwise while pulling it up and away from your unit.

Step 3: Remove Drain Pump Filter

You will also need to remove the small internal filter screen when removing the large cap. This is done by twisting it until it comes free from the unit and pulling it out completely.

 Remove Drain Pump Filter

Step 4: Remove Water

After removing the above items, you can now remove all of the water from inside your unit. This is done by sliding your hand under the drain pump filter and lifting gently. If you notice any debris on top of the sump pump screen, dump it into a strainer or a sink to prevent it from returning to your unit.

Step 5: Disconnect Drain Hose

Disconnect the drain hose from underneath your air conditioner unit. Untie the knot that holds the hose to the internal water pump and slowly pull it out within your AC unit. Be sure not to damage any internal wiring when removing this hose from your unit by pulling it straight up with a steady motion.

Step 6: Attach a Tube

To get the water out of your unit, you will need to attach a tube or hose that can be hooked to a sink or strainer. This is done by attaching one end of the hose to the drain port on the side of your AC and securing it with a clamp onto any available area on the edge of your unit.

Step 7: Reassemble Drain Pump and Hose

Once the hose is removed from your unit, you can then reassemble it back into its original location within your air conditioner. First, reconnect the drain pump filter to the internal water pump by rotating it until it snaps back into place. Next, connect the drain hose underneath your AC unit and tie a knot by the side of your unit to prevent it from coming loose.

Step 8: Reinstall Drain Cap and Cover

Once the hose is reinstalled, you can reinstall the drain cap and front cover onto your AC unit. If done correctly, all internal components will be back into place and ready for water to start draining from your AC unit.

Leaving the water inside your AC unit could result in mold and mildew buildup within the unit. This will lead to an unpleasant smell over time if steps are not taken to remove the excess water from your system.

Step 9: Unplug Air Conditioner

Unplug Air Conditioner

Once you have reinstalled your front cover, you can unplug your AC unit from any electrical outlet. This will stop the water from continuing to drain and potentially overflowing within your air conditioner unit. You risk having an enormous mess on your hands without opening it if the water starts draining out onto the floor.

Step 10: Plug Unit Back In

Lastly, you can plug your unit back into an outlet and turn it on to begin the cooling process again. Once the water has drained out of your AC unit after a few minutes of running, you can remove the hose under the sink or strainer and reconnect it to your AC unit to continue cooling your home.


Have you ever wanted to know how to drain the Whynter air conditioner? If so, read on for some helpful tips. We have created a step-by-step guide that will walk you through everything from opening up the outside panel of the unit, removing its metal cover, and draining out all the water inside. It is essential to clean and drain the water from your air conditioner periodically.

If you follow these steps and take care of your air conditioner properly, this should remove the excess water in your unit. If you have any further questions in regards to how to drain your Whynter Air Conditioner, feel free to leave a comment below and be sure to check back for more helpful articles on maintaining your unit properly moving forward.

Jennifer Branett
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