In most cases, when a malfunction occurs, dishwasher owners prefer to address service centers. However, it is not always worth to do that as sometimes the problem can be eliminated with the owner’s hands. To do this, look for the cause of the problem in the table below. It also lists tips on how to fix most problems.

Hobart AM900 dishwasher troubleshooting

TYPE OF FAILURE	POSSIBLE CAUSE	REMEDY
Dishes are not clean.	Wash arms stiff (you should be able to turn them easily by hand).	Take out wash arms and clean them thoroughly. Check water outlet from machine to wash arms is clear.
	Wash arm nozzles are clogged (visual check).	Take out wash arm, remove cleaning cap and rinse wash arm thoroughly until soil is removed.
	Wash arm nozzles are clogged (visual check).	Replace correctly.
	Rinse arm nozzles are clogged (possibly by lime deposit)	Remove rinse arms and decalcify them in separate container.
	Detergent concentration is too low or too high.	Check setting of detergent concentration.
	Coarse strainer soiled.	Take out strainer, empty and clean it.
	Fine strainer soiled or obstructed by lime.	Take out fine strainer. If heavily soiled soak in a vinegar solution. Then clean it thoroughly until the pores are free.
	Fine strainer soiled or obstructed by lime.	Cleaning is to be done daily.
	Wrong program selected for heavily soiled dishes.	Select program with longer wash cycle.
Dishes or glasses do not dry properly.	Rinse aid concentration too low.	Increase concentration.
	Dishes still greasy.	1. Detergent concentration too low: increase.
		2. Check if detergent is appropriate. If not choose a stronger one.
		3. Drain soiled water and refill machine.
		Check pre-scrapping procedure.
	Rack is not suitable for type of dishes (sloping).	Use appropriate racks to create a sloping position which allows water to drain away from cavities.
	Dishes stay too long in the machine at the end of program.	Take out dishes as soon as cycle is completed to enable them to dry.
Stripes and staines on dishes or glasses.	Rinse aid concentration too high.	Reduce quantity.
	Hard water or high mineral content.	Check water quality.
		Obtain details from local water authority.
		Recommended values:
		Ideal degree of hardness is 4 Clark.
		Ideal conductivity value for glasses is max. 150 pS/cm and for dishes max. 400 pS/cm.
	Rack is not suitable for type of dishes (sloping).	Use appropriate racks to create a sloping position which allows water to drain away from cavities.
	Insufficient rinse aid concentration causes staines	Increase quantity
	Machine with softener:	Use only granular regeneration salt.
	Wrong type of salt used.	Use only granular regeneration salt.
Glasses are totally or partially cloudy	Surface of glasses is rough and porous, this is called glass corrosion	This is not caused by a malfunction on the machine. Replace with new glasses.
Glass breakages.	Use of inappropriate dish or glass racks.	Use appropriate racks.
Machine suddenly stops during wash program.	Machine is connected to a ‘maximum power supply unit' which cuts out the energy consumer at a given point, or ma- chine is interlocked with another energy consumer unit.	Connect machine separately (call electrician).
Machine suddenly stops during wash program.	Blown site fuse.	Check site fuses.

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Hobart GC-10A dishwasher troubleshooting

Error code	Message text	Measure
3	Temperature not reached. Contact service technician.	Contact your HOBART Service Partner.
4
8
9
21	Fault in the drain system. Clean the drain hose if necessary and pump-out the machine again.	Clean the drain hose if necessary and pump- out the machine again.
22	Fault in the drain system. Clean the drain hose if necessary.	Clean the drain hose if necessary.
29	Program aborted. Close the door.	Close the door.
36	Detergent deficiency. Refill detergent.	Refill detergent
37	Rinse aid deficiency. Refill rinse aid.	Refill rinse aid
38	Input voltage too high! Machine has been switched off.	Have the input voltage checked by the (site) electrician.
39	Filling program aborted. Close the door.	Close the door.
41	External water treatment depleted. Replace.	Replace part or full desalination cartridge.
42	Osmosis pre-filter depleted. Replace.	Replace pre-filter.
43	Salt deficiency. Refill regenerating salt.	Refill regenerating salt
1	Hot water tank temperature sensor fault. Contact service technician.	Contact your HOBART Service Partner.
2
6	Wash tank temperature sensor fault. Contact service technician.
7
11	Wash chamber temperature sensor fault. Contact service technician.
12
13	Disinfection not guaranteed. Contact service technician.
14	Booster pressure sensor fault. Contact service technician.
15	Booster pressure sensor fault. Contact service technician.
16	Wash tank pressure sensor fault. Contact ser- vice technician.
17	Tank pressure sensor fault. Contact service technician.
18	Fault in the filling or drain system. Contact ser- vice technician.
19	Strainer blocked. Remove, clean and re-insert.	Remove, clean and re-insert strainer.
20	Wash tank pressure sensor fault. Pump-out machine.	Pump-out machine.
23	Fault in the filling system. Supply quantity too low.	Check site flow pressure.
31	Fault in the filling system. Check water supply.	Check water supply.
32	Fault in the filling system. Check water supply.	Check water supply.
33	Fault in the filling system. Contact service technician.	Contact your HOBART Service Partner.
35	Insert tank cover strainer correctly.	Insert tank cover strainer correctly.
44	Salt deficiency. Refill regenerating salt.	Refill regenerating salt
45	Number of wash cycles without regenerating salt exceeded. Contact service technician.	Contact your HOBART Service Partner.
52	Fault in the filling or drain system. Contact ser- vice technician. Disconnect machine from the water and power supply!	Contact your HOBART Service Partner.

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