Bosch Aquastar 125B Repair Parts / 125FX Repair Parts Tankless Water Heaters. Repair Parts for 125B & 125FX

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Bosch Aquastar Water Heater Repair Parts for 125B & 125FX

Due to liability issues, we are not authorized to do any Warranty or Technical Troubleshooting. You must receive the correct part number from a Bosch Technician.
If you need help with 125B & 125FX Repair Parts please click here or call Bosch at 1-800-642-3111.

Bosch Aquastar 125B Repair Parts Warning: Read This Before Ordering Parts for your 125B: Depending on when your heater was produced, some of the 125B parts may be different. The first 3 digits of the serial number indicate production date. See chart below to determine when your heater was produced and click on the number of your heater to get to the correct part(s).
Month \ Year	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009
January	861	961	081	181	281	381	481	581	681	781	881	981
February	862	962	082	182	282	382	482	582	682	782	882	982
March	863	963	083	183	283	383	483	583	683	783	883	983
April	864	964	084	184	284	384	484	584	684	784	884	984
May	865	965	085	185	285	385	485	585	685	785	885	985
June	866	966	086	186	286	386	486	586	686	786	886	986
July	867	967	087	187	287	387	487	587	687	787	887	987
August	868	968	088	188	288	388	488	588	688	788	888	988
September	869	969	089	189	289	389	489	589	689	789	889	989
October	870	970	090	190	290	390	490	590	690	790	890	990
November	871	971	091	191	291	391	491	591	691	791	891	991
December	872	972	092	192	292	392	492	592	692	792	892	992

Bosch Aquastar 125FX Repair Parts Warning: Read This Before Ordering Parts for your 125FX: Depending on when your heater was produced, some of the 125FX parts may be different. The first 3 digits of the serial number indicate production date. See chart below to determine when your heater was produced and click on the number of your heater to get to the correct part(s).
Month \ Year	1998	1999	2000	2001	2002	2003	2004	2005	2006	2007	2008	2009
January	861	961	081	181	281	381	481	581	681	781	881	981
February	862	962	082	182	282	382	482	582	682	782	882	982
March	863	963	083	183	283	383	483	583	683	783	883	983
April	864	964	084	184	284	384	484	584	684	784	884	984
May	865	965	085	185	285	385	485	585	685	785	885	985
June	866	966	086	186	286	386	486	586	686	786	886	986
July	867	967	087	187	287	387	487	587	687	787	887	987
August	868	968	088	188	288	388	488	588	688	788	888	988
September	869	969	089	189	289	389	489	589	689	789	889	989
October	870	970	090	190	290	390	490	590	690	790	890	990
November	871	971	091	191	291	391	491	591	691	791	891	991
December	872	972	092	192	292	392	492	592	692	792	892	992

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