Honeywell Cool On Blinking : How to Fix It?

Do you have a Honeywell thermostat that keeps blinking “cool”? If so, you are not alone. This is a common issue with air conditioning systems. If your Honeywell thermostat is blinking “cool on” and you are unable to control the temperature, there may be an underlying issue.

One possible problem could be that your thermostat is displaying “cool on” even when no air is being circulated. A thermostat is designed to regulate the temperature of a room when it exceeds a certain threshold.

Occasionally, the thermostat may lose power, display a warning message, or completely stop functioning. Even if the thermostat displays a message saying “cool on” or “hot on”, it may not actually be providing cooling or heating. If this happens to your Honeywell thermostat, there’s no need to panic as there are potential fixes available to rectify the situation. Several troubleshooting techniques exist that can quickly address the problem.

Honeywell Cool On Blinking

Honeywell cool on blinking : What does it mean?

This is an operating mode that your thermostat controls when it displays “Cool On”. This message indicates that your air conditioner is attempting to circulate cool air throughout your home. However, if your Honeywell thermostat continues to flash “Cool On” for an extended period of time and you are not receiving any cool air, there may be an issue.

The “Cool On” message may occasionally flash for a brief period of time. If it stops flashing after five minutes and the cold air returns, you should not be concerned. This function is an internal safety feature of the device. Your compressor should have approximately 5 minutes to start the system’s components. If your air conditioner loses power, you may also see this warning.

Troubleshooting measures:

If five minutes have passed and you still cannot feel cold air coming from your vents, you may need to investigate the issue. While we recommend attempting the following troubleshooting techniques first, you can always hire an HVAC specialist to take care of everything for you:

Turn the Honeywell thermostat down to the lowest setting:

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To begin, determine if your system is capable of regulating cooling. Set your thermostat to the lowest temperature setting to confirm this. Next, ensure that the mode is set to “Cool” and the fan setting is on “Auto”. Once you’ve made these adjustments, allow at least an hour for cold air to begin flowing through your vents. If you don’t notice any improvement, proceed with additional troubleshooting procedures.

Check your thermostat’s mode:

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Check your thermostat’s mode

Occasionally, a Honeywell thermostat may be configured incorrectly, leading to issues such as the flashing “Cool On” message. For example, if there has been a recent power loss, the thermostat may enter the “Setup” mode, requiring adjustments to be made.

If you notice that your system is in the “Setup” mode, take appropriate action to adjust the settings. Additionally, it’s important to check the time display on your thermostat and ensure that the correct time is set. By making sure that your system is configured correctly, you can resolve the issue within a matter of minutes.

If necessary, replace the batteries:

To ensure proper functioning of your thermostat, it is imperative that the batteries are in good condition. If the batteries run low, the “Cool On” indicator on your thermostat may start blinking. Inadequate electricity can prevent your thermostat from initiating the cooling or heating operation.

To check the battery status, look for the “Battery Low Indicator” on the thermostat display. Typically, you have approximately two months of battery life remaining once you receive this notification.

Ensure that your AC unit is powered:

After completing the previous troubleshooting procedures, make sure that power is available throughout the system. Before proceeding to check your indoor and outdoor units, ensure that your thermostat’s batteries are in good condition. It’s also a good idea to check the connections, plugs, and power sources to ensure that everything is powered on and correctly connected.

Furthermore, it’s essential to listen for any unusual noises as this could indicate a problem with the system. You should also check the circuit breaker and consider using power switches, which can be helpful. Another approach you might take is to look for blown fuses.

Verify the air filter:

Many system issues can arise due to a dirty or clogged air filter, which can also lead to increased energy expenses and a reduced lifespan of your air conditioning unit. It is generally recommended to replace your air filter every three months, and if you have pets or allergies, you may need to replace them more frequently.

Check the AC coils:

A Honeywell thermostat flashing “cool on” may be indicative of dirty air conditioner coils. Similar to air filters, dirty coils can significantly affect the comfort provided by your cooling system. However, this issue may go unnoticed as coils are inspected less frequently than filters.

Over time, coils can accumulate a significant amount of dirt, obstructing airflow and potentially causing various issues throughout the system. It is advisable to inspect these coils regularly and clean them if necessary. Moreover, removing any dirt or debris from the fins of your system is also recommended.

Last Words:

I hope this article was helpful in resolving the issue of the Honeywell thermostat “cool on” flashing. We conducted thorough research on the internet to provide you with the best possible solution. Furthermore, the discussion does not end here, as there is always room for further conversation in the comment section below. Please let us know which action helped you to resolve the Honeywell “cool on” blinking issue.

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