WMF coffee maker troubleshooting

The tables below contain useful tips on troubleshooting a WMF coffee maker. There are several tables, as the WMF brand produces a wide range of coffee machines varying in structure and, therefore, requiring different approaches when it comes to troubleshooting and repair. Some of the ranges include the WMF Presto series, the 1500S, 2000S, 5000S, 8000S, 150 F coffee machines, Bistro, and more.

WMF 150 F coffee maker troubleshooting

Error pattern	Possible cause:	Action instructions
The machine is not working.	The fuse in the fuse box has been triggered. The group is loaded too heavily.	Replace the fuse or reset it. Connect the machine to a separate group.
The brewing process indicator illuminates, but no water is going into the filter.	The dry-boil protection has been triggered.	Reset the dry-boil protection. Safeguards; dry-boil protection.
The descale indicator illuminates.	The scale deposits in the heating system exceed the set limit.	Descale the machine.
The descale indicator light remains on after descaling the machine.	The machine has not yet been reset.	Press the program button for 6 seconds. The light will go out. Resetting the descaling indicator light.
Steam is coming from the filter.	The machine was not descaled when indicated by the descale indicator light. The wrong water setting has been applied.	Descale the machine. Setting the descaling indicator.
The coffee is too strong.	Too much coffee has been placed in the filter.	Reduce the amount of coffee.
The coffee is too weak.	Not enough coffee has been placed in the filter.	Increase the amount of coffee.
	The water distributor is soiled, so that the coffee is not being completely drenched.	Unscrew the water distributor and clean it.
The coffee is not hot enough.	There is no lid on the jug.	Use the lid.
The jug is too full or is overfl owing.	The set quantity is too high.	Lower the quantity. Setting the amount of coffee.
Not enough coffee is getting into the jug.	The set quantity is too low.	Increase the quantity. Setting the amount of coffee.

WMF 150 F coffee maker. Errors with error message in display

Display Error	Possible cause	Action instructions
E1	Filling time error. Machine fi lls too slowly. The water supply is blocked	Check the water supply. Fully open the tap. Increase the water pressure. Switch the machine on and off. The error report will disappear.
E2	Maximum water sensor error.
E3	Minimum water sensor error.
E4 E5 E6 E7	Water sensor error. EEPROM error. Display error. Flow meter error.	The control unit reports a defect that can only be resolved by a WMF service technician. Contact WMF Service.
E8	Minimum water sensor error. Reservoir does not fi ll during the brewing process.	Check the water supply. Fully open the tap. Increase the water pressure. Switch the machine on and off. The error message disappears.

WMF 1000 coffee machine troubleshooting

Error message	Action
Use brewer	Brewer is not used: Use brewer
Brewer end switch	Brewer unit not inserted correctly: Use brewing unit correctly
	Brewing unit stiff: Remove brewer, open brewing chamber with multitool, apply a thin layer of the grease from the accessories kit to the red seal ring
Flow fault (water tank is empty)	Check to make sure that float in the water tank runs smoothly and fill water tank Bleed machine: Dispense hot water until a constant stream of water comes out
Flow fault (water tank is full)	Air in the system, possibly associated with loud pump noise: Check whether the water tank is pushed in completely Bleed machine: Dispense hot water until a constant stream of water comes out no hot water dispensing: Remove tank filter/dirt trap from tank, try again Brewing unit stopped up: Remove brewing unit, clean manually, insert and carry out cleaning program if the error occurs sporadically: set grinding degree coarser switch off pre-brew
EEPROM Error	switch machine on/off If the error repeats, the fault must be eliminated by the  WMF 1000 Service-Center.
Motor driver error	switch machine on/off If the error repeats, the fault must be eliminated by the  WMF 1000 Service-Center
grinder blocked	The grinders are blocked by foreign bodies: To eliminate,switch off machine, turn grinders clockwise with the multitool in order to be able to remove foreign bodies.
	grinding degree too fine: set grinding degree coarser
Temperature sensor steam Temperature sensor water	switch off coffee machine, allow to cool and switch on again If the error repeats, the fault must be eliminated by the  WMF 1000 Service-Center.
Timeout level	Air in the system, possibly associated with loud pump noise: Check whether the water tank is pushed in completely Take milk hose out of the milk container and press the milk foam button if hot water comes out instead of steam: Carry out descaling if steam comes out: Please call the hotline
no milk foam/milk output, but milk in reservoir	Check that milk hose is not kinked or crimped, lay milk hose again Clean all-in-one spout and milk nozzle
No milk foam, only hot milk	Put milk lever in milk foam position Carry out foamer rinse, pushing spout completely upwards if necessary, check whether the air intake nozzle of the all-in-one spout is stopped up
Milk or milk foam is too cold	Ensure that the milk nozzle is on the milk hose Check whether the correct milk nozzle is mounted (transparent for refrigerated milk)
Milk is too hot and there is too little or milk foam has bubbles	Milk is too warm: Refrigerate milk Check that milk hose is not kinked or crimped lay milk hose again Check whether the correct milk nozzle is mounted (grey for unrefrigerated milk) leakage: Check all connections and seals of the all-in-one spout Milk lever is not all the way up for milk foam or not all the way down for milk
All-in-one spout: Assembly/disassembly is stiff	lightly smear o-rings with WMF sealing grease and make sure that no grease gets into the air intake opening
Water tank stiff	lightly smear O-rings with WMF sealing grease
Display side doors open	Brewing unit is not inserted correctly or doors are not closed correctly - check! The lever labeled "Press" must always be in the level position.
Pump makes loud noises	Water tank is not inserted correctly (air in the system). Push water tank in completely Bleed machine: Dispense hot water until a constant stream of water comes out
Coffee has no creme	Unsuitable coffee mixture or coffee is not fresh Quantity of ground coffee is set too low Cups too cold: pre-warm Brewing temperature too low: increase temperature grinding degree too coarse: set grinding degree finer
Brewing unit can no longer be pulled out or inserted	Brewing unit is not in the basic setting Close the right side door and switch machine on The brewing unit can be adjusted using the multitool until the brewer can be inserted

WMF 1500S, 2000S, 5000S, 8000S coffee machine error codes

Error number	Error description	Action instructions
6	Brewing unit lockup current / Brewing unit stiff	Switch off the coffee machine. Clean the brewing unit.
26 36 (9516 for WMF 5000S)	Right grinder blocked Left grinder blocked	Switch off the coffee machine Disconnect mains plug Remove bean hopper Rotate the grinder disk counterclockwise only by using the multitool for the hopper (two pins must be inserted in the corresponding recesses on the grinder; see illustration) Replace hopper Switch on coffee machine If this occurs frequently: Set grinding degree one stage coarser
88	Boiler: over-temperature	Switch off the coffee machine, allow to cool and switch on again If error not remedied Switch off the coffee machine Call WMF Service
89	Boiler: heat-up time error	Switch off the coffee machine and on again If error not remedied call WMF Service
161	Flow error: brewing water	Clean the brewing unit Set grinding degree coarser Reduce quality If error not remedied call WMF Service
162	Flow error: when cleaning	Between each of the following steps switch off the coffee machine and on again. If error not remedied carry out the next step. Clean the brewing unit If error not remedied call WMF Service
163	Flow error: warm rinsing	Between each of the following steps switch off the coffee machine and on again. If error not remedied carry out the next step. Clean the brewing unit If error not remedied call WMF Service
186	Steam boiler: level	Beverage dispensing temporarily blocked. Check that grounds container is correctly inserted Switch off the coffee machine and on again
188	Heater error	Switch off the coffee machine, disconnect mains plug Call WMF Service
189	Steam boiler: heat-up time error	Switch off the coffee machine and on again If error not remedied call WMF Service

WMF 1500S, 2000S, 5000S, 8000S coffee machine troubleshooting

Error pattern	Action instructions
No hot water dispensing but water in grounds container	Clean hot water spout Call WMF Service (coffee dispensing possible)
No Choc dispensing but water in grounds container	Do not use Choc dispensing Call WMF Service (coffee dispensing possible)
Choc portion controller blocked, Choc dispensed only with water	Clean portion controller Empty powder Turn dosing auger manually until all powder is removed If necessary rinse with water (Allow to) dry completely
Coffee dispensing on the left / right differs	Clean the combi spout
No milk foam / milk output, but milk in milk container	Check whether the milk hose is kinked or squashed Re-route milk hose correctly Clean the combi spout Check whether milk nozzle is blocked Check whether milk cooler is iced
Milk foam not OK Temperature too cold or too hot	Change milk nozzle Use a suitable milk nozzle on the combi spout. Milk nozzle 3 kW • Very cold milk (up to 8 °C) • Chilled milk (8 to 12 °C) • Non-chilled milk (above 12 °C) Clean the combi spout If error not remedied Use another milk nozzle from the accessories
The milk foam dispensing spits strongly Milk too hot	Check whether the milk system has been cleaned Clean the milk system Check whether the milk has been cooled sufficiently
No powder beverage dispensing	Clean the mixer bowl Is the hose kinked? Perform milk cleaning and rinsing oftener, if necessary daily Dose less powder Dose more water
Pump runs continuously, water in grounds container	Switch off the coffee machine and on again If error not remedied call WMF Service
Milk foamer assembly and disassembly stiff	Lightly smear the O-rings with WMF gasket grease
Choc hopper cannot be replaced	Manually turn the drive for the dosing auger at the portion controller slightly in a clockwise direction Check whether Choc hopper is accidentally locked
Bean hopper cannot be replaced	Check whether bean hopper is accidentally locked

WMF Presto display error messages

WMF Presto coffee machine error codes

Report display	Descr.
2	Brewer without electricity
5	Brewer shutoff
6	Brewer over current
7	Brewer timeout (no electricity
26	Portioner current malfunction
36	Current malfunction Portioner
46	Current malfunction Portioner 3
87	Boiler sensor damaged
88	boiler excess temperature
89	boiler heating time
130	General current malfunction
149	General voltage malfunction
161	Flowmeter malfunction during brewing
162	Flowmeter malfunction during cleaning
163	Flowmeter malfunction during checking
164	Flowmeter malfunction during hot water dosage
165	Flowmeter malfunction during choc dosage
166	Flowmeter malfunction during DK feeding
167	Flowmeter malfunction during descaling
186	Timeout during steam boiler filling
187	Steam boiler sensor damage
188	Excess temperature in steam boiler
189	Heating-time steam boiler
9061	Standby Event
906	Reset Event!
9104	Timer function not possible
	Fifo was deleted
	Defaults into RAM
	Cleaning was interrupted
	Machine cleaning in progress
	Milk foam cleaning in progress
	AD-transformer ready! (for developers only)
948	Malfunction in level sensor
956	Auto detect malfunction: Right grinder not detected
957	Auto detect malfunction: brewing-valve not detected
958	Auto detect malfunction: Oscillating pump not detected
959	Auto detect malfunction: Release valve not detected
969	Auto detect malfunction: Fan not detected
961	Auto detect malfunction: Hot water dispensing valve not detected
96	Auto detect malfunction: Mixer not detected but choc/topping portioner detected
963	Auto detect malfunction: choc/topping portioner not detected but mixer detected
964	Auto detect malfunction: Mixer valve detected but no powder portioner detected or; Hot water-Choc/topping valve not detected but choc/topping portioner detected
965	Auto detect malfunction: Milk pump detected but no cappuccino valve detected or milk pump not detected but cappuccino valve detected
	Power supply reports voltage too low
	Pump switches to pressure -lowering mode (Info = button number)
975	Reset triggered by customer
988	MDB communication error coin checker
989	MDB communication error card reader
990	MDB communication error banknote reader
991	4 V are switched off and then on again (reset for MDB equipment on 4 V)

WMF Bistro coffee machine error codes

Error number	Error description	Action instruction
24	Motor blocked	All associated brews barred. Note hopper switchover! Tap on beans hopper The beans may slide down and the light barrier is touched.
34
186	Steam boiler filling time.	Steam dispensing barred, milk foam barred. Machine Off-On; note heating display for information for the WMF Service ! Water tap open?
189	Heating time of the steam boiler.	Heating off, steam dispensing barred. Machine Off-On Check local fuses
130	General current error.	Machine Off-On Switch off lighting (adjust), all colours to zero Allow the machine to cool off and try again Call the WMF Service if the error occurs again
148	Current error on the steam boiler vent valve.	One can continue to use the machine; dosing fluctuations can occur for milk meterings. Confirm steam dispensing or milk dispensing from time to time Call the WMF Service
131	Power supply error on the hot water valve.	The hot water dispensing is barred: One can continue to use the machine. Do not use hot water anymore. Call the WMF Service
132	Current error on cold water mixing valve, hot water valve.	Hot water dispensing is barred: One can continue to use the machine. Do not use hot water anymore. Call the WMF Service
137		Barr on beverage mixer: One can continue to use the machine. Do not use choc anymore. Call the WMF Service
140	Current error on steam valve 1	Steam dispensing is barred: One can continue to use the machine. Do not use steam dispensing or Steampower. Call the WMF Service
141	Power supply error on steam valve 2	Steam dispensing is barred: One can continue to use the machine. Do not use steam dispensing or Steampower.
142	Power supply error on the cap. valve 1	Milk beverages are barred: The machine can be used except for milk beverages. If installed use steam dispensing for foaming.
143	Power supply error on the cap. valve 2
134	Power supply error on brewing valve for cold water	One can continue to use the machine. Coffee beverages may be brewed too hot. Call the WMF Service
149	General power supply error	Machine Off-On Allow the machine to cool off and try again If the error occurs again: Call the WMF Service
161	Flow error	Water tap opened! Machine Off-On Perform cleaning and try again
Coffee dispensing on the left/right differs		Clean the combi spout
No milk foam/no milk dispensing, although there is milk in the hopper		Check whether the milk hose is kinked or squashed Lay milk hose correctly Clean the combi spout Milk nozzle blocked? Pinch valve turned to strongly?
Milk foam not OK, temperature too low		Change milk nozzle: - green milk nozzle for use of cooled milk - white or brown milk nozzle for uncooled milk Clean the combi spout Close pinch valve
The milk foam dispensing spits strongly Milk to hot		Use white or brown milk nozzle Set foam quality lower Clean milk cleaning system Open pinch valve
No illumination No display No tone when pressing a button		Pull out drip tray Check the fuse behind the drip tray Pull out mains plug! Replace fuse Only fuse F4A is permissible