What the Service Includes
The sensor replacement service covers the full process from diagnostics to post-installation testing. Key steps include:
- precise diagnostics of each sensor (temperature, level, Hall, leak/flow)
- measurement of resistance, voltage, signal using multimeter and oscilloscope
- careful removal of the old sensor without damaging tubes or boiler
- replacement of temperature sensor (NTC) in boiler or group head
- replacement of float or electrode water level sensor
- replacement of Hall effect sensor (brew unit position, motor position)
- replacement of flow sensor / leak detector
- replacement of seals, gaskets, O-rings included with the sensor
- verification of correct installation and connector seating
- calibration or initialization of the new sensor (if required by model)
- flushing of the affected circuit
- full machine testing after replacement: warm-up, espresso brewing, steam, level control, no errors
- stability check over multiple cycles
Service is performed on sensors from De’Longhi, Saeco, Philips, Jura, Krups, Siemens, Bosch, Melitta, Nivona, Gaggia, Dedica, and many other brands.
When Sensor Replacement Is Needed
Signs indicating the need to replace one or more sensors:
- repeated errors “overheat”, “low temperature”, “high temperature”, “E03”, “E04”, “sensor failure”
- boiler does not heat or overheats (water boils, excessive steam)
- machine displays “fill tank” despite being full
- opposite — constantly shows “empty tank” after refilling
- errors “brew unit position”, “E07”, “E24”, unit fails to return home
- machine stops mid-cycle with “leak detected”, “flow sensor”, “aqua stop” error
- water flows continuously, pump never stops after brewing
- “leak sensor” or “aqua stop” errors even with dry drip tray
- issue persists after cleaning contacts and connectors
- multimeter shows open circuit, short, or implausible values on the sensor
Sensor failures are most commonly caused by scale buildup, corrosion, mechanical wear, moisture on contacts, power surges, or aging of plastic/magnet components.
Work Stages
- Diagnostics — identification of faulty sensor via error codes and measurements
- Disassembly of machine to access the sensor
- Photographing connector positions and sensor mounting
- Removal of old sensor (draining boiler water if needed)
- Cleaning mounting area from scale and old seals
- Installation of new sensor (temperature, level, Hall or leak/flow)
- Replacement of all related gaskets, seals, clamps
- Connection of connector, contact verification
- Reassembly and system refilling with water
- Test warm-up of boiler and temperature monitoring
- Verification of level sensor response to filling/draining
- Testing brew unit positioning (for Hall sensor)
- Brewing several espresso and steam cycles
- Final check for error-free operation and stable readings
- Cleaning external parts from repair traces
Why Choose Grade in Khmelnytskyi
Grade in Khmelnytskyi has substantial experience replacing sensors in coffee machines across various brands and generations. We use only verified original sensors and high-quality compatible alternatives proven to perform reliably. Every replacement includes complete diagnostics, testing, and calibration. Before starting, the client receives a clear explanation of which sensor failed and why replacement is required. Real customer reviews are available here: reviews. We also provide full coffee machine repair, robot vacuum repair, charging station repair, and other appliance services. Contacts: +380 97 719 4430, Telegram. Schedule: Mon–Sun 11:00–20:00. Address: Khmelnytskyi, Panasa Myrnoho St., 31/3.
Easy from Anywhere in Ukraine
Can’t bring your coffee machine to Khmelnytskyi? Ship it via Nova Poshta. We accept equipment from any city in Ukraine, perform diagnostics, sensor replacement, and return a fully functional machine. All shipping conditions and details are listed here: shipping via Nova Poshta. Convenient for customers from Kyiv, Lviv, Odesa, Dnipro, Kharkiv, Zaporizhzhia, and other regions.
