1, the solenoid valve of the brewing head is blocked.

2. The water pump doesn't work and the boiler doesn't feed water.

3. The boiler is not heated and there is no pressure.

I still suggest that you call the after-sales service and let professionals repair it.

The efficacy and function of coffee:

1. Drinking coffee after a hangover can quickly oxidize acetaldehyde converted from alcohol and decompose it into water and carbon dioxide to be excreted;

2, diuretic dehumidification caffeine can promote kidney function, discharge excess sodium ions in the body, increase urination, improve bloating and edema, and help to lose weight. Black coffee is more diuretic.

3, relieve constipation coffee can promote metabolic function, activate digestive organs, and have a great effect on constipation.

4, improve liver function research results show that patients with chronic liver diseases such as hepatitis or cirrhosis, if they drink more than a cup of coffee every day, their liver function will be improved.

5, appetizing caffeine will stimulate sympathetic nerve, stimulate gastrointestinal secretion of gastric acid, promote digestion, prevent bloating, gastroptosis, and promote gastrointestinal hormones and peristalsis hormones, thus quickly relieving constipation.

6, calming the wind and stopping spasm coffee can increase high-density cholesterol, accelerate the metabolism of bad cholesterol, reduce coronary atherosclerosis, and reduce the chance of stroke.

7. Drinking a cup of black coffee after a meal can effectively whiten the skin. Black coffee can also promote cardiovascular circulation.

8. Preventing patients with cardiovascular disease and hypotension from drinking a cup of black coffee every day can make themselves better. In the process of brewing coffee at high temperature, it will also produce an antioxidant compound, which is helpful for anti-cancer, anti-aging and even prevention of cardiovascular diseases, and can be comparable to fruits and vegetables.

9. Eliminating fatigue Caffeine is a mild stimulant, which can improve the sensitivity and attention of the human body, accelerate the metabolism of the human body, improve the mental state and physical quality of the human body, and thus eliminate fatigue.

10, prevention of gallstones For caffeinated coffee, it can stimulate gallbladder contraction and reduce cholesterol which is easy to form gallstones in bile. The study found that men who drink two or three cups of coffee a day have a lower risk of gallstones than 40%.

1 1. Bathing with coffee powder is a kind of hyperthermia, which can reduce weight.

Extended data:

People applied electronic technology to the coffee machine, and realized the automatic control of the whole process of coffee making, such as grinding, pressing, filling, brewing and dregs removal, and created the coffee machine.

At the beginning of the 20th century, an "impatient engineer" who lived near Naples, Italy, was impatient with the long time of dropping coffee, so he came up with a method of making coffee at high temperature and high pressure to shorten the time, so he invented the unique Italian coffee quick conditioning in the world, and espresso became popular.

References:

Coffee machine-Baidu encyclopedia