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Quick And Easy Tips On What to Do When Honeywell AC Stops Working

Quick And Easy Tips On What to Do When Honeywell AC Stops Working

Imagine a really hot day, and you’re eager to cool off at home by turning on your Honeywell AC, only to discover that it’s not working as expected. What do you do in such a situation? In this article, we will guide you through troubleshooting your Honeywell AC and provide solutions to common issues. Whether it’s a minor problem or a more complex issue, we’ve got you covered.

Common Issues and Solutions

1. Reset the Thermostat

Quick And Easy Tips On What to Do When Honeywell AC Stops Working

One of the common problems that can occur with your Honeywell AC is a connection failure between the thermostat and the AC unit. When this happens, you might see an error message, such as “Connection Failure” or error code e43. To resolve this issue, follow these steps for resetting the thermostat, specifically for models like the Honeywell RTH65801006 and RTH6500WF Smart Series:

  • Press and hold both the “up” button and the “FAN” setting button simultaneously.
  • Wait for the display to change.
  • You’ll see “1” on the left and “0” on the right. Use the second button to change the “1” to “39” and then press the “down” button to retain the “0.”
  • Press the first button to confirm the changes, and you’ll see the “Wifi Setup” text on the screen.
  • Connect your phone to the thermostat to complete the Wi-Fi setup.
  • Change the password and wait for the setup to finish, allowing you to use the thermostat again.

2. Set the Mode

Once you’ve resolved the thermostat issue, you can proceed to choose the appropriate mode for your desired function. Here are the different modes of operation and how to activate them:

  • Air Conditioning Mode: This mode, also known as cooling mode, allows you to set the desired temperature between 60 and 90 degrees Fahrenheit. Look for the snowflake icon and press the mode button until it’s illuminated.
  • Dehumidifying Mode: The dehumidifying mode is represented by two droplets and is designed to reduce moisture levels in a room. This mode is typically available on AC models with heating capabilities. To use it, disconnect the exhaust hose to allow hot air to circulate in the room. To eliminate excess moisture, follow these steps:
  1. Turn off the unit and unplug it.
  2. Remove the upper drain plug and collect the spilled water in a basin.
  3. Connect the drainage hose and secure it in place.
  4. Direct the hose to a floor drain or a bucket.
  5. Turn the unit on and switch to dehumidifier mode.
  • Fan Mode: The fan mode is for circulating air without cooling. It enhances air circulation in the room and is indicated by a fan blade icon. It’s recommended to keep windows open to allow proper airflow.
  • Heat Mode: Not all Honeywell AC models have a heat mode, which is represented by a sun symbol. It reverses the condenser fan to release warm air into the room, with a temperature range of 60-90 degrees Fahrenheit. Note that in heat mode, you should drain the collected moisture regularly. This mode is ideal for low humidity levels.

3. Check the Exhaust

Quick And Easy Tips On What to Do When Honeywell AC Stops Working

Issues with the exhaust can also cause your Honeywell AC to malfunction. Check if the exhaust vent is blocked by dirt, debris, or insects. Leaks in the exhaust system can also disrupt the AC’s operation.

Honeywell typically provides a venting kit with their AC units, including window brackets and an exhaust hose. To properly install the exhaust hose, follow these steps:

  • Measure the window to ensure a proper fit.
  • Install the bracket in the lower part of the window opening, and you may need assistance from a professional for accurate cutting.
  • Place the bracket on the window facing outward, and secure it with the included silicone pins.
  • Connect the hose to the AC unit, with the other end attached to the bracket.
  • Close the window and turn on the AC.

4. Relocate the AC

The location of your AC unit can significantly impact its performance. Ensure that the window is connected to an open exterior space rather than an interior room, as this can result in the recirculation of hot air. If your room lacks a window, consider installing the exhaust on a sliding door. Make sure there’s a nearby drain or a basin to catch water.

Avoid placing the AC near heat sources, such as a kitchen, as this can counteract its cooling effect. If you must use the AC in the kitchen, ensure that no open flames or heat sources are active.

5. Consult a Technician

If none of the above solutions work, it’s advisable to consult a professional technician. There may be an underlying issue, such as a malfunctioning motor or other technical problems. Describe the circumstances under which your AC stopped working to help the technician diagnose the problem effectively.

Differences in Honeywell Portable AC

Honeywell portable AC units offer several advantages compared to other common types of AC, such as window units. One significant difference is their portability, as you can easily move a portable AC to any location in your home. In contrast, window AC units require permanent installation and are challenging to relocate.

However, it’s important to note that window AC units are typically more efficient in cooling larger spaces, thanks to their higher capacity.

How Often Should You Drain a Portable Air Conditioner?

The frequency at which you should drain your portable AC depends on how quickly the condensate tank fills up. As a general guideline, it’s recommended to drain the unit every eight hours to prevent overflow and potential damage to the AC.

Changing the Honeywell AC Filter

Quick And Easy Tips On What to Do When Honeywell AC Stops Working

To maintain optimal efficiency and clean air quality, it’s advisable to replace the Honeywell AC filter every 6 to 12 months. Here are the steps to change the filter:

  • Remove the filter cover.
  • Carefully take out the old filter to avoid spreading dust and debris.
  • Insert the new filter according to the airflow direction indicated on it.
  • Replace the filter cover.

Additionally, you can remove the washable filter at the top of the filter cover and clean it with water and soap every month.


In this article, we’ve provided you with valuable information on troubleshooting your Honeywell AC and dealing with common issues that may arise. We’ve discussed the different modes of operation, explained the differences between portable AC units and other types, and offered guidance on when to drain your portable AC and how to change the filter. With these tips and solutions at your disposal, you can enjoy a comfortable and cool environment in your home even during the hottest days of summer. Stay cool!

Quick And Easy Tips On What to Do When Honeywell AC Stops Working

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