Keurig Slim Won't Turn On

Keurig Slim Won’t Power On After Descaling (FIXED)

If you are facing the frustrating issue of your Keurig Slim not turning on after descaling, you are not alone. Many Keurig Slim owners have encountered this problem, which can be quite perplexing. 

Descaling is an essential maintenance step to keep your Keurig Slim functioning optimally, but sometimes it can lead to unexpected issues like the machine refusing to power on. 

This article will explore the common reasons behind this problem and provide troubleshooting steps to get your Keurig Slim up and running again.

Why Keurig Slim Won’t Turn On After Descaling

Before we delve into the solutions, let’s understand why your Keurig Slim may refuse to power on after descaling. The most common culprit is a thermal switch that trips when the machine gets too hot during the descaling process. This safety feature ensures your Keurig doesn’t overheat, but sometimes it is too cautious and causes the machine to lose power.

However, there are other factors that could contribute to this problem, such as a faulty power source or excessive heat inside the Keurig. But fear not, we’ll tackle these obstacles and bring back the joy of that perfect morning cup of joe!

Other Possible Causes

Descaling Solution Residue – During descaling, if the descaling solution isn’t rinsed out completely, it can leave behind residue that may affect the machine’s internal components. This residue can cause electrical connections to malfunction, resulting in the Keurig Slim not turning on.

Water Level Sensor Issue – The water level sensor in the Keurig Slim plays a crucial role in detecting the presence of water and ensuring the machine operates correctly. If the sensor becomes faulty or gets damaged during descaling, it can prevent the machine from powering on.

Malfunctioning Power Button – A malfunctioning power button can be another reason for the Keurig Slim’s unresponsiveness. Over time, the power button can wear out or get stuck, making it difficult to turn on the machine. If moisture or residue affects the button’s functionality, this issue can occur after descaling.

Electrical Connection Problems – Electrical connection issues, such as loose wires or faulty internal connections, can prevent the Keurig Slim from receiving power. These problems can arise during the descaling process, especially if the machine is not handled with care.

How To Fix Keurig Slim That Won’t Turn On After Descaling

Of course, I won’t leave you hanging. The moment we’ve all been waiting for – the grand reveal of the steps to fix that stubborn Keurig Slim that won’t power on after descaling. I shall guide you through this troubleshooting adventure with the finesse of a seasoned barista.

Check the Power Source

Let’s start with the basics. Check the power source. Unplug your Keurig brewer, wait a moment, and then plug it back in snugly. Give it a gentle push to securely insert it into the socket. Now, let’s give it a go and try turning on the machine. If it still refuses to cooperate, don’t lose hope just yet. Grab your Keurig and shuffle it to a different spot in your kitchen, preferably where you can reach a completely different wall outlet.

Remember, we’re on a mission here, so avoid using the outlet above or below the one you just tested. Got it? Good.

If the power issue continues to play hard to get, we need to eliminate any doubts. Grab another kitchen or handheld appliance and plug it into one of the outlets you tested earlier. If that second appliance happily springs to life, it’s a clear sign that there’s a problem with your coffee maker.

Reset the Thermal Switch

Now, here comes the tricky part. We suspect that the pesky thermal switch got tripped during the descaling process, leaving your Keurig in a sullen state.

Firstly, give your machine some time to cool down, unplug it, and let it chill for a couple of hours. This allows the thermal switch to reset itself, like a tired bear awakening from hibernation. Once the waiting game is over, plug your Keurig back in and hope for the best.

In the rare event that the thermal switch remains stubbornly unresponsive, it’s time to call in the big guns – customer service. If your machine is still within the purchase guarantee, they’ll come to the rescue and sort things out.

However, if your Keurig is no longer under warranty, don’t despair just yet. You can attempt to disassemble the machine yourself (carefully, mind you) and reset the thermal switch using a trusty paper clip.

Keurig Slim Won't Power On After Descaling

How to Disassemble the Keurig?

  1. Unplug the Keurig and remove the water reservoir.
  2. Look for small pins on the sides of the machine that hold the side cover in place.
  3. Use a screwdriver to push the pins in while gently lifting the side cover to release the hooks.
  4. Lift the side cover completely after unhooking all the pins.

How to Reset the Thermal Switch on Keurig?

Now, it’s time to reset that elusive thermal switch.

Locate a small white cap with a hole in the middle and wires on each side. If you look from the front of the coffee maker, you’ll find it on the right side, attached to the spiral heating element. A keen eye will spot it when peering from the side.

Take a trusty paper clip, needle, or toothpick and gently push it into the center hole of the white cap. You won’t hear a satisfying click, but that’s normal.

Just ensure you push it in enough to reset the coffee maker. And voila! Your Keurig should spring back to life, ready to brew you that heavenly cup of coffee.

Clean the Power Button

If the power button is sticking or not functioning properly, gently clean it with a damp cloth. Make sure the machine is unplugged before cleaning. This method can help remove any residue or debris affecting the button’s functionality.

Run Cleaning Cycle

If the Keurig powers on after the previous steps, run the cleaning cycle with only fresh water to eliminate any residual descaling solution that might be causing the problem. Fill the water reservoir with fresh water and run multiple brew cycles without inserting a K-Cup. This process can help remove any leftover residue.

For more troubleshooting steps related to specific Keurig Slim issues, such as not pumping water or coffee, you can refer to our detailed guide: Keurig K-Slim Not Pumping Water or Coffee.

Contact Keurig Support

If none of the troubleshooting steps mentioned above resolves the issue, contacting Keurig support for further assistance is recommended. Their trained technicians can provide specific guidance tailored to your situation and offer potential solutions to get your Keurig Slim back in working condition.


Experiencing a Keurig Slim that won’t turn on after descaling can be frustrating, but with the right troubleshooting steps, you can overcome this issue. Remember to check the power source, reset the thermal switch, clean the power button if necessary, and run a cleaning cycle. If all else fails, reach out to Keurig support for expert assistance. Soon enough, you’ll be enjoying your favorite cup of coffee once again!


Can descaling cause the Keurig Slim to stop working?

Descaling itself should not cause the Keurig Slim to stop working. However, if not done correctly or if there are underlying issues with the machine, it could contribute to the problem.

Why won’t my Keurig Slim turn on after descaling?

There could be several reasons, such as a tripped thermal switch, descaling solution residue, a water level sensor issue, or electrical connection problems.

How can I reset the thermal switch on my Keurig Slim?

To reset the thermal switch, locate the small white cap with a hole in the middle and wires on each side. Use a paper clip, needle, or toothpick to gently push into the center hole of the white cap.

How can I prevent this issue from happening again in the future?

To prevent the Keurig Slim from experiencing power issues after descaling, ensure thorough rinsing to remove any descaling solution residue and handle the machine with care during the process.

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Ronald Miller

We write everything about coffee and espresso machines for a few years. Our goal is to provide you with helpful content that you can trust based on our own personal experiences, information from manufacturers, and tips and tricks shared by coffee and espresso machine users online.

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