MEIKO Commercial Dishwasher Error Code ERR 212: Boiler Over 95 C
ERR 212 on the UPster U 400 M2 display reads Actual boiler temperature too high (>95 C). The manual lists a sticking contactor or an incorrect or defective sensor as causes, and says it is not possible to continue working.
High: possible overheating of boiler water; the machine stops until the contactor or sensor is repaired.
- Code
- ERR 212
- Maker
- MEIKO
- Equipment
- Dish machines
- Applies to
- Meiko UPster U 400 M2 glass and dishwasher, M001DWUC10M2-10
What does MEIKO error code ERR 212 mean?
The control watches the boiler temperature and stops heating at its setpoint. If the measured temperature rises above 95 C, it shows ERR 212, Actual boiler temperature too high (>95 C), and stops the machine, because water that hot is a scald hazard and means heating has not switched off. The manual lists two causes: a contactor that is sticking, which keeps power on to the heater, or an incorrect or defective sensor, which can make the control read wrongly. It states that it is not possible to continue working and that a service technician is to be called. The two causes behave differently: a stuck contactor means the water really is too hot, while a bad sensor can show a high reading when it is not. The display reads Actual boiler temperature too high (>95 C).
Affected models and control systems
This code is listed for the Meiko UPster U 400 M2 glass and dishwasher, type M001DWUC10M2-10, in section 9.6.1 Messages (the ERR table on printed pp. 34-35).
Code numbers and their meaning can change between control generations. We match the full model and control before acting on a code.
What you may notice
- ERR 212 with the text Actual boiler temperature too high (>95 C)
- Machine stopped and will not continue
- Steam or very hot water from the machine
Possible causes
Likely causes — what usually sits behind error code ERR 212 on this control. A technician confirms which one it is before any part is replaced.
- Contactor sticking
- Sensor incorrect or defective
- Heater element or its wiring shorted so heat cannot be switched off
- Scale insulating the sensor so it reads differently from the water
- Sensor shifted out of its proper position
Safe checks before calling for service
- Switch the machine off at its switch and keep clear of steam or hot water.
- Let the machine cool before anyone touches it or opens the door.
- Do not try to run another cycle until a technician has checked it.
- Note when ERR 212 appeared and whether the heater seemed to run on after the cycle, for the service call.
How a technician diagnoses error code ERR 212
- Isolate power and let the boiler cool before opening anything.
- Check the heating contactor for sticking or burned contacts.
- Compare the sensor reading with a reference thermometer in the boiler.
- Check the sensor position and wiring.
- Check the heater element for leakage to ground.
- Replace the contactor or sensor that fails and run a heat-up while watching the reading.
- An overheated boiler holds scalding water and steam under pressure.
- A stuck contactor means power may still reach the heater, which is a live 208-240 V hazard.
- Telling a bad sensor from a stuck contactor needs a meter and a reference thermometer.
Technical reference
- Document
- UPster U 400 M2 Glass- and dishwasher - Original operating instructions (type M001DWUC10M2-10)
- Edition
- 9760441 / Valid from: 2018-02 / Update: 2026-06
- Models / control
- Meiko UPster U 400 M2 glass and dishwasher, M001DWUC10M2-10
- Section
- 9.6.1 Messages: INFO table printed p. 33, ERR table pp. 34-35 (of 50)
- Checked
- October 2026
We use the maker's document to read the code and do not reproduce it. Always confirm the complete model and control before applying these steps.
Related MEIKO dish machine error codes
Can I keep working with ERR 212?
No. The manual says it is not possible to continue working, and to call a service technician.
Is the water really over 95 C?
Not always. A defective sensor can report too high a value, but until a technician checks, treat the water as scalding.
Is ERR 212 dangerous?
Overheated water can scald. Switch the machine off, let it cool and keep people clear.
Need help with MEIKO error code ERR 212?
A technician confirms the cause on site and gives you the price in writing before any work starts.