Delonghi Portable Air Conditioner Troubleshooting – Let’s Fix It

The Delonghi portable air conditioner is a great way to cool down any room of your home or office. But, sometimes things go wrong. Here are some solutions to common problems with the Delonghi portable air conditioner.

Here are some common issues and troubleshooting tips for portable air conditioners from Delonghi, including why air conditioners fail to blow cold air or end up making a strange smell, or why they keep turning off unexpectedly.

This guide will help you through the troubleshooting process with Delonghi portable air conditioners. The troubleshooting tips and solutions are created by the Delonghi team of engineers. Some of the common issues people face include cooling capacity, air flow, and water drainage.

Delonghi Portable Air Conditioner Troubleshooting

Delonghi Portable Air Conditioner Troubleshooting

Whether your AC doesn’t come on or the device isn’t cooling the room sufficiently, the solution may be easier than you think. Contact the company for help, and if that doesn’t work, read the instruction manual!

If your Delonghi portable air conditioner isn’t cooling efficiently, or at all, try these simple fixes before you call a technician — many simple tech issues can be solved with a bit of research and elbow grease.

The easiest way to fix your portable air conditioner is by consulting the troubleshooting section of your user manual. It’s usually near the front of the book and has a list of common problems and their solutions.

Delonghi Portable Air Conditioner Works Only For A Few Minutes

If the portable air conditioner does not work, check these connections:

If there is any kink in the air exhaust hose or if it is tightly coiled, remove the kink or coil this area of the hose. Check that there are no objects blocking the unit from discharging air.

f the unit is turned on but no air comes out of the hose, check to see if the hose is properly connected to the back of the portable AC unit. If it seems loose, attach it firmly using the included fasteners. If you are using it inside your home, make sure that any objects obstructing the hose’s path have been removed.

Delonghi Portable Air Conditioner Won’t Turn On

A portable air conditioner won’t turn on when there is no current. Check that your portable air conditioner is plugged into a wall outlet, and not just a power strip or extension cord.

A tripped internal safety device can also cause this problem. If you’re using a plug-in extension cord, try instead using a heavy-duty outdoor fashion extension cord to see if it works.

Check the fuse box or circuit breaker. If you find that the circuit breaker is tripped, reset it using a circuit tester.

Delonghi Portable Air Conditioner Not Blowing Cold Air (Not Cooling Room)

In most cases, the problem is the filter needs washing and is clogged. If you have time, you can try to take it out and clean. If not, then you should seek professional help to clean it.

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If you want to do it yourself, then open the side air exhaust hose port and remove the filter cage (see image). You will see a circular foam filter with a diameter of about 2.5 inches.

If your portable air conditioner isn’t cooling the room, you may need to take a few troubleshooting steps. First, check that the doors, windows, and curtains are shut. This can be an easy step to overlook! If these are all closed, there is still a chance that heat sources like an oven or hairdryer are present in the room.

If the door is open or a window is open, the portable AC unit cannot perform optimally. The air flow will be interrupted, preventing the cold air from being distributed throughout the room. Open windows in conjunction with portable ACs can cause a negative pressure in the room, which leads to hot air flowing back into the room.

Please ensure your room does not exceed this size. If the room is larger, you will need to purchase a larger air conditioner or two units. Also, check that the exhaust hose is properly connected and that the dust filters are clean.

Delonghi Portable Air Conditioner Will Not Run For 3 Minutes After It Has Been Restarted

When you restart your portable air conditioner, it takes a few minutes for the compressor to start up again. This is normal and shouldn’t be a cause for concern. You can use your air conditioner while it’s warming up and it will then kick back on.

Your Delonghi portable air conditioner needs to rest. When you turn it off, you’re causing the unit’s internal compressor to stop working temporarily. Delonghi’s portable air conditioners need three minutes to restart their auto-defrosting function. This auto-defrost function is essential for cooling your room to the right temperature.

Delonghi Portable Air Conditioner Smell Bad

A portable air conditioner is the perfect solution for cooling off small spaces. While these machines are small, they still need regular maintenance to work efficiently. One of the most common problems that plagues portable air conditioners is a clogged filter.

Dust accumulates quickly inside air conditioning units, especially if filters aren’t cleaned often. A clogged filter can reduce airflow and cause the machine to overheat, which will reduce its performance.

For the best results, keep your portable air conditioner clean by regularly cleaning the dust filter and (where applicable) electrostatic filter. This will prevent the unit from emitting an unpleasant odor.

The first step in maintaining the cleanliness of your portable air conditioner is to remove the filters, taking care not to damage them. Then, soak the filters for several minutes in warm water with a small amount of detergent or vinegar, then rinse and let dry.

Delonghi Portable Air Conditioner Keeps Turning Off

No one wants to get caught in a hot room without an air conditioner. If your unit keeps shutting off, you could have a problem. Thankfully, it’s not hard to troubleshoot — check the cause for this issue and find quick fixes to get your portable AC running properly again.

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The following are some of the issues that you can try to resolve. The exhaust hose must be connected properly and there should be no kinks or bends in it. The filter needs to be cleaned. Its temperature setting may not be correct for the room, set it lower to cool faster.

Ensure the unit is set to a temperature that makes sense for your location. Low temperatures might be ideal for cooling off a room while higher temperatures can help maintain comfort in the summer heat.

Work around obstructions with the exhaust hose. If it has kinks, remove them or try turning it sideways. The hose should not be placed in direct sunlight, as this can cause damage to the material and reduce its lifespan.

If you’re using a clogged filter, replace it as soon as possible.

Delonghi Portable Air Conditioner Error Codes

The De’Longhi portable air conditioner has an easy-to-understand self-diagnosis system that can point you in the right direction when something goes wrong. It displays important error messages on its easy-to-read display, and it can also give you a quick fix.

Some of the most common Delonghi air conditioner error codes include HL, LT and F1. If any malfunctions occur, the unit will display electronic error codes on the LCD screen to help you identify what’s going on.

Delonghi Air Conditioner Error Code LT

An air conditioner powered by Delonghi has a system error message “LT”. The meaning of the message is Low Temperature. This might mean that you are experiencing a problem related to excessive formation of frost inside the indoor unit or it may be related to the temperature and humidity sensor located on the condenser coil.

Air conditioner is stuck in defrost mode. Wait 20 minutes for the unit to defrost, then restart the power.

Delonghi Portable Air Conditioner Error Code HL

If your unit has been running for more than a few hours, the water tank inside may be full. If this happens, you’ll need to empty the tank before continuing.

Follow these steps when emptying the Delonghi portable air conditioner tank.

To remove the water tank, insert your hand through the door above the word PULL and pull it out as far as possible.

Detach the portable air conditioner’s tank from the unit by unscrewing it — you may need to use a wrench found in most toolboxes. Screw the drain hose into where the tank was previously connected.

Drain the water tank (Delonghi portable air conditioner).

Unscrew the cap for draining the water in the Delonghi portable air conditioner, but first make sure you’ve unplugged it from the wall outlet and haven’t switched on the unit.

Move the drain hose to a suitable container in which you can drain out excess water.

Delonghi Air Conditioner Error Code F1

An F1 error/alarm code is a fairly common problem with the Delonghi Air Conditioner. This indicates that a fault has occurred in the PCB of the air conditioner and the air conditioner will not work as intended.

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To fix this, turn off and unplug your air conditioner for 5 minutes then plug it back in. Let it run for a few hours to allow the AC to regain normal operating temperature.

Delonghi Air Conditioner Error Code CF

The air conditioner has a water filter that needs to be changed when this error is displayed.

Delonghi Air Conditioner Error Code PF

The air conditioning is not cooling because the probe is damaged.

Check if the air conditioning unit is working by turning it to a different temperature, or turn it down and wait for a minute. Make sure there are no obstructions in front of the air conditioner. If there are, remove the obstruction.

 If this error is displayed, your local Delonghi service centre should conduct a diagnostic test to check whether the issue is with the appliance or the sensor.

How To Reset Delonghi Portable Air Conditioner Errors

If your air conditioner is displaying an error code, you may need to reset it. This can be done with the following steps:

Turn off your air conditioner or unplug it from the wall.

Allow it to sit for about 5 minutes.

Plug the unit back in.

After the unit powers on, turn on the thermostat to start a new cooling cycle.

Delonghi Pinguino Not Cooling

There are several reasons why a DeLonghi Pinguino might not be cooling. The air conditioner may not be properly sized for the room, the unit may need to be cleaned, or the filters may need to be replaced.

Additionally, the air conditioner may not be properly vented, or the temperature may be set too high.

The air conditioner filters are dirty. Clean or replace the filters according to the manufacturer’s instructions. The air conditioner thermostat is not set low enough. Set the thermostat to the lowest temperature setting.

The air conditioner compressor is not working. Check to see if the compressor is running and if it is, try resetting it. If the compressor still does not work, you may need to replace it.


Portable air conditioners are a lifesaver in the summer and if yours is having issues, you’re probably trying to fix it yourself.

But just like with any other appliance, always check your manual first — it could save you time and energy while also helping prevent more serious issues from occurring.

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