Why Autoclave Controllers Fail
Hospital and dental autoclaves run 8–20 sterilization cycles per day. Saturated steam, pressure fluctuations, and condensation create a highly aggressive environment for electronics. Control boards, door lock solenoid drivers, pressure sensor interfaces, and temperature regulation circuits deteriorate in predictable, repairable ways.
Common Failure Modes by Brand
Melag MELAtherm 10 / MELAquick 12+ / Vacuklav 31 B+
- Door lock controller circuit — error E16/E17, unit refuses to start cycle; microswitch driver transistor failure
- Pressure transducer signal board — E20 pressure fault; ADC input amplifier corrosion from condensate ingress
- Temperature controller PWM board — E30 temperature regulation fault; MOSFET gate driver IC failure on steam generator heater circuit
- Display and control panel PCB — frozen display, keypad unresponsive; electrolytic capacitor failure after 5–7 years
Belimed WD 290 / S-Series / H-Series
- Main CPU control board — unit stuck in boot loop, corrupted firmware EEPROM after power surge
- Valve driver relay board — steam inlet valve stuck open or closed; relay contact welding from inrush current
- Water quality conductivity board — false "water quality fault" with properly treated water; conductivity sensor op-amp drift
Getinge GEW / GSS / Sterizone
- Chamber pressure control module — vacuum phase failures; pressure regulation PID board capacitor degradation
- Power supply regulation board — intermittent 24V collapse causing random mid-cycle shutdowns
W&H Lisa / Lexa / Lara
- Steam generator control board — generator not heating; triac driver failure on heating element circuit
- Sensor interface PCB — multiple simultaneous sensor faults; I2C bus corruption from moisture ingress
Our Approach
All autoclave board repairs are performed to IPC-A-610 Class 3 standards. After repair we verify full cycle completion across Pre-Vacuum, Gravity, and Flash programs. Documentation for IQ/OQ validation available on request.
Turnaround and Pricing
Door lock driver board: €150–320. Pressure/temperature regulation board: €180–400. Main CPU board: €280–550. Power supply: €160–350. Standard turnaround: 2–5 business days. Service hours: Mon–Fri 08:00–16:00 CET. EU courier shipments accepted. 12-month warranty.