16
ERROR
1
2
3
4
MEANING/LIKELY CAUSES
Brew Tank TCO is Open
(no Heater on brew tank).
Likely Causes: Draining and
forgetting to refill.
Or Bad Triac.
Preheat Tank TCO is Open
(no Heater on preheat tank).
Likely Causes: Draining and
forgetting to refill.
Or Bad Triac.
The Brewer must be descaled now:
When 4 dispense cycles in a row take longer
than expected to brew, the brewer displays
this error message. This error message lets
the user know damage may occur if they do
not descale now.
The float switch is lower than it should
be while the CWT inlet valve is open and
the time limit is exceeded.
Likely Causes: Inlet water disconnected.
Or low water pressure.
Or Inlet Valve not opening.
Or CWT level sensor stuck low. Or Leaks.
MENU TEXT
BREW TCO OPEN
HWT DRAINED
MODULES: POWER, HWT
PREHAT TCO OPEN
HWT DRAINED
MODULES: POWER, HWT
DESCALE REQUIRED
CHECK WATER SUPPLY
MODULES: POWER, CWT
Critical Error Messages
ERROR
5
6
7
8
9
MEANING/LIKELY CAUSES
The float switch is sensed higher than it
should be during a brew cycle. The inlet
valve might be stuck open, and the Float
Switch is now preventing flooding.
Likely Causes: Leaky/Stuck Inlet Valve.
Or CWT level sensor stuck high.
The Preheat Tank thermistor reading is
<37°F. The heater will not turn on until
it reads above this threshold. This is to
protect against damage.
Likely Causes: The brewer just stored at
cold temperature.
Or bad Thermistor.
Same as above for Brew Tank.
Thermistor in the Preheat Tank reads >240°F.
Likely Causes: Problems with thermistor.
Or heater triac.
Same as above for Brew Tank.
MENU TEXT
RUNAWAY FILL
MODULES: POWER, CWT
PREHEAT TANK COLD
MODULES: HWT
BREW TANK COLD
MODULE: HWT
MODULES: POWER, HWT
MODULES: POWER, HWT
If any problems persist, contact your Keurig Authorized Distributor.
