Bunn Coffee Maker Not Hot Enough – How To Fix It?

Bunn Coffee Maker Not Hot Enough – Why & How To Fix?

There’s nothing quite as disappointing as starting your day with a lukewarm cup of coffee, especially when you were expecting a piping hot brew.

The Bunn Coffee Maker, renowned for its efficiency and reliability, can sometimes run into the common issue of not heating up adequately.

If you find yourself facing this problem, fear not. In this article, we’ll delve deep into the reasons behind your Bunn Coffee Maker not being hot enough and guide you step-by-step on how to bring the heat back to your morning cuppa.

Bunn Coffee Maker Does Not Work: Why And How To Fix It?

bunn coffee maker does not work: why and how to fix it?

There are countless problems that might take place in a Bunn Coffee Maker. These problems can stop the coffee machine from working properly or will not filter the coffee like it did before.

Here, in this section, you will learn about the various problems that a Bunn Coffee Maker experiences and how you can fix them. So, let’s get started, shall we?

Faulty Heating Component


When you make coffee, you need hot water so that it can extract the flavors from the coffee grounds or beans. But that can only happen by the heating component of the machine, which can easily boil the water without much issue.

The heating component of the coffee machine is known to serve a dual purpose for the coffee machines with the warming plate. It will boil the water to make the coffee, and it will also keep the coffee at the correct drinking temperature.

The heating component is part of the water’s journey right through the tank. When the water flows right out of the tank and then through the hoses, it will pass the heating component.

The heating component will increase the temperature greatly. The heating work will be done quickly so that the coffee machine can make a hot cup of coffee within a matter of minutes.

The Problem

The most common reason why the coffee machine is not getting hot is due to the heating component. The heating component might not function properly. So, when the machine generates heat, it’s not getting as hot as it did before.

 How To Fix The Issue?

faulty heating component how to fix the issue?

The heating components are not something that can be fixed easily. So, when the element is not functioning properly, you just need to replace it with a new one.

Issues With The Thermostat


Coffee machines can regulate their temperature with  1 or more thermostat. The thermostat can easily sense the water temperature within the coffee machine.

When the water is not that hot, it will trigger the heating component to switch on. After that, it helps reach the target temperature  and then switches off the heating component.

The Problem

A faulty thermostat will not let the coffee machine get hot. It’s because the thermostat will mistakenly sense  the water to be  hot, and so it shuts down the heating element way too soon.

Due to such reasons, the coffee machine does not get hot enough to make a fresh cup of coffee.

How To Fix The issue?

issues with the thermostat how to fix the issue?

Firstly, there is no way to ‘FIX’ a thermostat when it does not function properly. But you can certainly get it replaced with a new one.

Just open up the panel of the coffee machine, access the interior components, and just remove the thermostat to disconnect the wiring. After that, you can get a new thermostat, install and connect it to use it properly.

The Activation Of High Altitude Mode


When you reside at a higher altitude, the water’s boiling point gets reduced. In simple words, you don’t need to heat up the water so high to boil it.

The coffee machine manufacturers are well-aware of it and make sure to work it within all their product designs. Due to such reasons, you will find many coffee machines come with the “HIGH ALTITUDE” mode, which heats the water to a lessened temperature.

This particular mode helps in saving up energy by reducing the targeted temperature for the boiling water.

So, the thermostat of the machine will shut down the heating component way too soon than it normally does.

The reduced temperature at high altitude is not enough to make the water boil and will make a good cup of fresh coffee.

The Problem

When the coffee machine is not getting hot enough, it’s because of the “high altitude mode,” which is activated. The machine might have come out of the box with the mode enabled. Otherwise, someone might have switched it on unknowingly.

If that’s the reason why the coffee machine doesn’t heat up properly, there is no issue with the coffee machine. The machine functioning just behaves the way it was designed to do so.

How To Fix This Issue?

the activation of high altitude mode how to fix this issue?

The solution to this particular problem is quite straightforward. You just have to switch off the high-altitude mode and then use the machine.

Dirty or Rusting Warming Plate


Coffee machines utilize their heating component for two primary reasons:

1st Reason: The heating component can boil the water which passes through it.

2nd Reason: The heating component can also heat up the warming plate, which keeps the coffee carafe hot for hours.

In simple words, the heating component aids the coffee machine in making the coffee but will also keep the coffee hot for several hours.

The Problem

Here, the reason why your coffee machine is not hot enough is because of the warming plate, which has become rusty or dirty. This means that the plate cannot transfer the heat properly.

Here is another way through which you can look at it:

The coffee machine produces coffee as it normally does. But the dirty or rusty warming plate doesn’t maintain the coffee’s temperature, which leaves it lukewarm.

How To Fix This Issue?

dirty or rusting warming plate how to fix this issue?

Try to do your best to clean up the warming plate. That’s one of the most effective ways through which you can eliminate stains, which contain dried-up coffee spills. But you have to replace the rusted warming place with a new one.

The rust can block the heat from transferring it. That’s why the coffee machine doesn’t get hot enough. The best way to get rid of this problem is by replacing it.

Some Troubleshooting Tips You Should Know

Here are some tips on troubleshooting when your coffee machine does not get hot enough

  • When the coffee does not come out properly, or it’s dripping way too slowly, you should check the spray head. You also need to make sure that the holes are not clogged up. If possible, try to go through the setup process again.
  • If the coffee machine is providing you with cold coffee, try to plug the machine in and then switch it on and wait for 15 minutes so that the water heats up quickly.
  • When you make decaf, use soft water, or fine grind, you need to utilize a proper flow restrictor spray head. You can easily order it from Bunn, and doing so will prevent the funnel from overflowing.

Use the Right Techniques to Fix the Bunn Coffee Maker

use the right techniques to fix the bunn coffee maker

Just like all the other appliances, the coffee machine might malfunction or will stop functioning at some point.

So, when you find yourself in this situation, don’t panic! Instead, follow the instructions provided in this article.

Go through it, and you will surely learn how to fix the coffee machine if it’s not getting hot enough.

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