How does the pressure switch work in a high-pressure cleaner? Components, problems and solutions

Does your high-pressure cleaner have uneven operation? The problem could be the pressure switch, an important internal component for:

• the control of the pump pressure, ensuring it is within safe limits for product operation;
• the safety of the device, the user and the surface on which it is to be operated;
• the energy optimization of the product by allowing the high-pressure cleaner to automatically shut down when not in use (Total Stop).

How the pressure switch is composed

To understand its operation, any problems and the solutions to be applied to solve them, it is important to know that the pressure switch in a high-pressure cleaner consists of:

• The driving member, which is a rod that moves when the pressure reaches a certain minimum or maximum threshold;
• The microswitch, which is a switch that is operated or not operated by the rod making the pump motor turn off or on again;
• A rubber diaphragm, placed between the rod and microswitch, which fades the contact and is responsible for, among other things, hydraulic sealing;
• The spring, which determines the sensitivity of the pressure switch to the specific requirements of the high-pressure cleaner on which it is installed.

Reasons why the pressure switch in a high-pressure cleaner may malfunction:

1. Defects, wear or mechanical damage to the various components of the pressure switch. If the microswitch, rod, membrane or spring are damaged or worn out, they will prevent the motor from restarting from the Total Stop condition, or from stopping if the gun lever is released;
2. Faulty electrical connections. In this case, there may be faults or anomalies related to the electrical connections that prevent the high-pressure cleaner from working properly;
3. Clogging or damage to the hose or to the hydraulic system. If the nozzle or a section of the hose is obstructed or if there is a small water leakage, the pressure signal is not properly transmitted to the pressure switch, preventing its smooth operation;
4. Presence of impurities inside the pump or pressure switch. If there are small impurities such as grains of sand or metal shavings inside the pump, the pressure signal is not properly transmitted to the pressure switch, preventing its smooth operation;

Solutions for the pressure switch of a high-pressure cleaner not working properly

Here is how to solve these common problems:

1. Check if there are no obstructions or damage to the hose. After making a visual analysis and detecting a blockage in the hose, remove any scale or other components preventing the regular flow using a pin, compressed air jet or low-pressure water.
2. If leaks are present, check if the hydraulic connections are tight. In case of damage, replace the hose with a new component suitable for high-pressure cleaners, opting for a genuine spare part;
3. Check if the mechanical parts of the pressure switch of the high-pressure cleaner move smoothly and without obstruction or blockage. In that case, it is important to carry out a thorough cleaning, restoring its operation. If damaged diaphragms, rods or microswitches are present, replace with preferably genuine spare parts;
4. Finally, in case no obstruction, leakage or mechanical damage has been detected, check for electrical issues between the pressure switch of the high-pressure cleaner and other parts. Check if the cables are properly connected and that there is no damage or loose wires. Check if the pressure switch is properly installed and the voltage is the same as specified in the manual. If there is damage, replace the individual components or, in the case of major failures, the entire pressure switch.

Generally speaking, a proper maintenance of your high-pressure cleaner can prevent the occurrence of the most common pressure switch issues, thus allowing continuous use of your semi-professional cleaning product to its full potential.

How to get the best results from your high-pressure cleaner?

The high-pressure cleaner is the perfect solution for those looking for a winning ally for household cleaning, garden furniture, large outdoor spaces, cars, motorcycles, bicycles and routine maintenance.

To get the most out of your high-pressure cleaner, achieving maximum cleaning results without stress, effort and in a short time it is important to:

• Choose the model best suited to your needs, evaluating the frequency and purpose of use. This will enable you to optimize your investment by identifying the most suitable solution for your home;
• Apply the right accessory according to the type of cleaning. With the floor scrubbing lance you can clean your home’s patio, with the fan nozzle you'll wash away major dirt from your car's rims without damaging them and with the pipe cleaning hose you can clear clogged gutters and manholes;
• Carry out thorough maintenance, avoiding damage to various equipment or the high-pressure cleaner itself. Wash each component thoroughly after use and store it in a safe place or in the handy storage compartment found in many models.