Honeywell Thermostat Keeps Going Up To 85 Degrees

Experiencing a constant rise to 85 degrees with your Honeywell thermostat? No need to worry! Our troubleshooting guide is here to help you out, offering expert tips and practical solutions to get your thermostat back to normal.

If your Honeywell thermostat keeps hitting 85 degrees, it might be due to a low battery or a power interruption, causing it to default to 85 degrees. An active program schedule could also be behind this behavior.

To fix it, first check your battery status. If they’re good, look for a reset option at the back of your thermostat to give it a fresh start. Alternatively, try removing the batteries or disconnecting the C wire for a minute to reset the thermostat. While some units may be stuck, a reset often does the trick; you can find specific instructions in the manual if you have your thermostat model handy. 

Having a well-functioning thermostat is crucial for a comfortable home. If these steps don’t solve the issue, it’s a good idea to consult the manual for your specific model or reach out to Honeywell support for further assistance. A properly working thermostat ensures you stay cozy without breaking a sweat. Stay comfortable! 

Possible reasons a Honeywell thermostat keeps going  up to 85 degrees

Encountering thermostat issues? Let’s break it down:

Cause: Low Battery

  • Fix: Simply replace the battery. A fresh one should do the trick.

Cause: Active Program Schedule

  • Fix: Use the hold function to override any schedules or clear them out if needed.

Reason: Faulty Wiring

  • Fix: Ensure that the C wire is properly connected. This can make a big difference.

Reason: Defective Thermostat

  • Fix: If all else fails, it might be time to replace the thermostat with a new one.

Keep these fixes in mind for a hassle-free thermostat experience! 

How to Troubleshoot a Honeywell Thermostat That Keeps Resetting to 85 Degrees

If your Honeywell thermostat insists on hitting 85 degrees, here are some easy troubleshooting steps to identify and possibly solve the issue. Let’s dive in:

Check the Batteries

If your thermostat operates on batteries, first inspect them for low or dead power. When the batteries run low, they might give your thermostat sporadic power, leading it to reset to the default 85 degrees.

Swap out the batteries if needed and observe if this fixes the problem. 

Read also: Goodman Furnace Code F02

Check the Settings

Verify your thermostat settings to ensure there are no active programs or schedules. When programmed, your thermostat autonomously adjusts the temperature based on set schedules. This can override your manual settings, causing it to reset to the programmed temperature.

To address this, utilize the hold function on your thermostat to temporarily override the current schedule. Alternatively, reset your thermostat to eliminate any existing schedule. 

Check the Wiring

Another potential culprit for your thermostat’s spontaneous temperature changes is loose wiring. But, safety first! Before delving into your thermostat’s wiring, always turn off the power to your heating or cooling system.

Inspect if your thermostat runs on batteries or a C-wire. If it relies on a C-wire, ensure it’s snugly connected to the terminal, with its end properly stripped at least half an inch for a solid contact with the thermostat terminal.

A gentle tug can confirm the connection. Just ensure that the C-wire is securely and correctly attached to the terminal. 

Firmware glitch

Electronic devices, including thermostats, can act up, but a straightforward reset often does the trick. As I mentioned before, resetting your Honeywell thermostat is a breeze. You can use the reset button at the back, take out the batteries, or disconnect the C wire for a couple of minutes. It’s a quick and effective solution. 

Defective thermostat

If all the troubleshooting tips mentioned earlier don’t do the trick, it might be that your thermostat has done its duty and it’s time for a replacement. But don’t jump to conclusions just yet; give it another shot by reaching out to Honeywell customer support for a second opinion. 📞 They might have a solution up their sleeves!

Essential Takeaways for Top Results

Essential Takeaways for Top Results

Here are the key takeaways to get the best results when your Honeywell thermostat keeps going up to 85 degrees:

Check Thermostat Settings:

Ensure that your thermostat is set to the desired temperature. Sometimes, it might accidentally be set too high, causing the room to heat up.

Inspect Location and Placement:

Verify that the thermostat is not exposed to direct sunlight or near heat sources. Incorrect placement can lead to inaccurate temperature readings.

Read also: Low Suction Pressure High Head Pressure

Calibrate your thermostat:

Consider calibrating your thermostat to enhance its accuracy. This can be done by following the manufacturer’s instructions or consulting a professional.

Examine the HVAC system:

Regularly check and maintain your heating, ventilation, and air conditioning (HVAC) system. Dirty filters or malfunctioning components could be causing the temperature imbalance.

Smart Thermostat Software Update:

If you have a smart thermostat, ensure that its software is up to date. Manufacturers often release updates to improve performance and address bugs.

Contact Customer Support:

If issues persist, reach out to Honeywell’s customer support for assistance. They can provide guidance, troubleshoot problems, or offer solutions to ensure your thermostat operates correctly.

Remember, a combination of these steps can often resolve the issue and keep your home at a comfortable temperature.

Pros and Cons Unveiled for Informed Decisions

Informed decision-making is crucial, whether it’s choosing a product or deciding on a course of action. 

Let’s break down the pros and cons to help you make well-informed choices.

1. Informed Choices: Understanding the pros allows you to make decisions aligned with your needs and preferences.1. Time-Consuming: Gathering information can be time-consuming, potentially delaying the decision-making process.
2. Minimized Risks: Being aware of potential drawbacks helps in minimizing risks associated with a decision.2. Overwhelm: Too much information can be overwhelming, leading to decision fatigue.
3. Confidence Boost: Knowing the positives boosts your confidence in the decision, leading to increased satisfaction.3. Analysis Paralysis: Overanalyzing may lead to indecision, hindering progress.
4. Long-Term Success: Informed decisions often contribute to long-term success and positive outcomes.4. Unforeseen Factors: Some factors may not be anticipated, leading to unexpected challenges.

In summary, weighing the pros and cons ensures a balanced perspective for making informed decisions. Keep in mind your priorities and the specific context to navigate through the choices effectively.

Expert Tips to Prevent Future Headaches

Expert Tips to Prevent Future Headaches

Here are some expert tips to keep those future headaches at bay. First off, stay hydrated! Drinking enough water can make a big difference in preventing those pesky head pains. And when it comes to screen time, take regular breaks to rest your eyes. It’s a simple trick that can save you from staring-induced headaches.

Another pro tip is to manage stress through relaxation techniques. Whether it’s deep breathing, meditation, or a calming walk, find what works for you. Lastly, keep an eye on your posture, especially if you spend a lot of time at a desk. Good ergonomics can go a long way in preventing those neck and head discomforts. So, remember to sip water, take breaks, chill out, and mind your posture to keep those headaches at bay!


Why does my Honeywell thermostat keep increasing temperature?

Your thermostat may be increasing the temperature if it’s programmed with a schedule or if there’s a malfunction. Check the programmed settings and consider resetting the thermostat to default or reprogramming it.

Why is my thermostat going higher than the setting?

If your thermostat is exceeding the set temperature, it could be due to a calibration issue or a malfunction. Verify that the thermostat is correctly calibrated, and if the problem persists, consider contacting Honeywell customer support or a professional technician.

Why is my thermostat changing temperature on its own?

Unwanted temperature changes may occur due to programming errors, interference, or a malfunction. Review the thermostat’s programming, check for any interference sources, and consider resetting the thermostat or contacting Honeywell support for assistance.

Why does my thermostat keep resetting to 80?

If your thermostat consistently resets to 80 degrees, it might be a default setting or a malfunction. Check the thermostat manual for instructions on resetting it to default settings, or contact Honeywell support for guidance on resolving the issue.


If your Honeywell thermostat has a habit of climbing to 85 degrees, fear not! Low batteries, active programs, faulty wiring, or even a minor glitch may be the culprits. 

Resolve it by checking and replacing the batteries, adjusting settings, securing wiring, or giving your thermostat a quick reset. If issues persist, consult your manual or reach out to Honeywell support.
Remember, a well-functioning thermostat ensures a cozy home without heat-related surprises. Stay comfortable and worry-free!

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