How do coffee makers work?

In this brief guide, we are going to answer the question “How do coffee makers work” with an in-depth analysis of how coffee makers work. Moreover, we are going to have a brief discussion about the components of the drip coffee machine.

So without much ado, let’s dive in and figure out more about it.

How do coffee makers work?

The working of the coffee machine begins in the reservoir. You pour in water and close the lid to let your filtered cold water do its work.

The water flows into the reservoir’s cold-water tube, which is located beneath the hole in the reservoir. A single-way valve directs cold water into the aluminum tube beneath the resistive heating element.

The water flows through the hot-water tube partially. When you turn on the heating element, the coffee machine begins to warm up. After a few minutes, the water in the aluminum tube will begin to boil.

Boiling water produces bubbles large enough to pump hot water via the hot water tube through the coffee machine to the rod. 

There is a showerhead. Water is sprayed over the coffee beans after arriving from the white hot-water tube. In certain coffee makers, the water flows out of the hose onto a perforated plastic disc called the drip area and simply falls through the perforations into the coffee grinds.

What is the role of sensors in coffee makers?

Sensors in coffee makers detect when the coil becomes too hot and cut off the current. The current is then turned back on after it has cooled. They keep the coil at a uniform temperature by cycling on and off like this. Fuses simply shut electricity if they detect an abnormally high temperature. They exist for safety purposes in the case that the main sensor fails.

What are the components of a drip coffee machine?

The drip coffee machine is divided into top and bottom components.

You can find the following at the top:

  • Reservoir
  • Hot water tube
  • Faucet/Showerhead
  • Drip area

Other FAQs about Coffee Maker which you may be interested in.

Which is the best coffee maker for coffee snobs?


The reservoir is a coffee maker’s largest component. It contains the water to be transmitted to the coffee. The water that you put into your machine. Coffee maker reservoirs can vary according to size. Some can hold more water than others, but they’re just a plain water bucket.

Hot-water tube

The hot-water tube is an isolated tube running from top to bottom of the machine. The tube is usually white and works as a means of moving water from one location to another.


The faucet is essentially a little shower over the coffee area, which sprays the water through the warm water tube. It guarantees that you saturate all the coffee grinds so that you may make your coffee cup of quality.

Drip area

The drip area is the roller coffee separator. It is a little plastic piece with troughs in it that checks the rate of water that falls on the coffee field below.

You can find the following at the bottom:

  • The Tube of Cold Water
  • The Tube of Warm Water
  • Heating element
  • One way valve
  • The connection to the power cord

Coldwater tube

The cold water tube connects to a hole on the bottom of the reservoir on one side and the heating element on the other side of the tube. It receives the cold water and then transfers it on to be heated in the coffee machine.

Hot water tube

On one side of the tube, the hot-water tube connects to the hot-water tube that goes through the machine to the tube in the heating element and on the other. It takes the water and transmits it to the coffee ground for sprinkling.

Heating elements

The heating element consists of two elements – a heating element resistant and a water-carrying tube. It is composed of aluminum and is used for heating the water. The cold water tube is connected to the hot water tube, which performs all the work.

One way valve

Either in the hole of the reservoir or the heating element tube, there is a one-way valve. It makes sure that the water is continued in the appropriate direction through your coffee machine.

Power cord

The power cord is just what you plug into the wall to power the machine. It’s the energy that works for all this. Without it, you would have no coffee.

You can read about common coffee machine problems and their fixes here.


In this brief guide, we answered the question “How do coffee makers work” with an in-depth analysis of how coffee makers work. Moreover, we also have a brief discussion about the components of the drip coffee machine. 


Mahnoor Asghar is a Clinical Nutritionist with a bachelor's degree in Nutrition and Dietetics. She is compassionate and dedicated to playing her part in the well-being of the masses. She wants to play a fruitful role in creating nutrition and health-related awareness among the general public. Additionally, she has a keen eye for detail and loves to create content related to food, nutrition, health, and wellness.