Description
Vaillant 178988 Flow Sensor – Compatible Replacement
The Vaillant 178988 Flow Sensor is a compatible replacement part designed for selected Vaillant EcoTEC boilers.
The flow sensor detects domestic hot water demand and helps the boiler respond when a hot tap is opened. A faulty flow sensor can cause hot water problems, intermittent hot water, or failure to recognise DHW demand.
This compatible replacement part is suitable for a wide range of Vaillant EcoTEC Plus, EcoTEC Pro and EcoTEC Exclusive boilers.
Compatible Boilers
Vaillant EcoTEC Exclusive Series
- EcoTEC Exclusive 832 VUW 32/4 2007-2016 – GC No. 47-044-37
- EcoTEC Exclusive 835 VUW 356/5-7 – GC No. 47-044-66
- EcoTEC Exclusive 838 VUW 386/4 2007-2016 – GC No. 47-044-38
- EcoTEC Exclusive 843 VUW 436/5-7 – GC No. 47-044-67
Vaillant EcoTEC Plus 824 / 825 Series
- EcoTEC Plus 824 VUW 246/3-5 2005-2012 – GC No. 47-044-31
- EcoTEC Plus 824 VUW 246/3-5 R1 2005-2011 – GC No. 47-044-31 R1
- EcoTEC Plus 824 VUW 246/3-5 R3 2011-2012 – GC No. 47-044-31 R2
- EcoTEC Plus 824 VUW 246/5-5 2012-2012 – GC No. 47-044-40
- EcoTEC Plus 824 VUW 246/5-5 R1 2012-2013 – GC No. 47-044-40 R1
- EcoTEC Plus 824 VUW 246/5-5 R2 2013-2015 – GC No. 47-044-40 R2
- EcoTEC Plus 824 VUW 246/5-5 R4 2015-2015 – GC No. 47-044-40 R4
- EcoTEC Plus 825 VUW 196/5-5 R6 2017 Onwards – GC No. 47-044-83 R6 (0010021823)
- EcoTEC Plus 825 VUW 256/5-5 R4 2015 Onwards – GC No. 47-044-57
Vaillant EcoTEC Plus 831 / 832 / 835 Series
- EcoTEC Plus 831 VUW 316/3-5 2005-2013 – GC No. 47-044-32
- EcoTEC Plus 831 VUW 316/3-5 R1 2005-2011 – GC No. 47-044-32 R1
- EcoTEC Plus 831 VUW 316/3-5 R3 2011-2012 – GC No. 47-044-32 R3
- EcoTEC Plus 831 VUW 316/3-5 R5 2013-2013 – GC No. 47-044-32 R5
- EcoTEC Plus 831 VUW 316/5-5 LPG – GC No. 47-044-46
- EcoTEC Plus 831 VUW 316/5-5 NG – GC No. 47-044-41
- EcoTEC Plus 831 VUW 316/5-5 R1 LPG – GC No. 47-044-46 R1
- EcoTEC Plus 831 VUW 316/5-5 R1 NG – GC No. 47-044-41 R1
- EcoTEC Plus 831 VUW 316/5-5 R2 LPG – GC No. 47-044-46 R2
- EcoTEC Plus 831 VUW 316/5-5 R2 NG – GC No. 47-044-41 R2
- EcoTEC Plus 831 VUW 316/5-5 R4 LPG – GC No. 47-044-46 R4
- EcoTEC Plus 831 VUW 316/5-5 R4 NG – GC No. 47-044-41 R4
- EcoTEC Plus 832 VUW 246/5-5 R6 LPG – GC No. 47-044-85 R6 (0010021825)
- EcoTEC Plus 832 VUW 246/5-5 R6 NG – GC No. 47-044-84 R6 (0010021824)
- EcoTEC Plus 832 VUW 326/5-5 R4 – GC No. 47-044-58
- EcoTEC Plus 835 VUW 306/5-5 R6 – GC No. 47-044-82 R6 (0010021822)
- EcoTEC Plus 835 VUW 356/5-5 R4 – GC No. 47-044-53
Vaillant EcoTEC Plus 837 / 838 / 937 / 938 Series
- EcoTEC Plus 837 VUW 376/3-5 R1 2006-2011 – GC No. 47-044-33 R1
- EcoTEC Plus 837 VUW 376/3-5 R3 2011-2012 – GC No. 47-044-33 R3
- EcoTEC Plus 837 VUW 376/5-5 2012-2012 – GC No. 47-044-42
- EcoTEC Plus 837 VUW 376/5-5 R1 2012-2013 – GC No. 47-044-42 R1
- EcoTEC Plus 837 VUW 376/5-5 R2 2013-2014 – GC No. 47-044-42 R2
- EcoTEC Plus 837 VUW 376/5-5 R4 2014-2015 – GC No. 47-044-42 R4
- EcoTEC Plus 838 VUW 286/5-5 R6 2017 Onwards – GC No. 47-044-86 R6 (0010021826)
- EcoTEC Plus 838 VUW 386/5-5 R4 2015 Onwards – GC No. 47-044-60
- EcoTEC Plus 937 VUI 376/3-5 2006-2012 – GC No. 47-044-39
- EcoTEC Plus 937 VUI 376/5-5 2012-2012 – GC No. 47-044-43
- EcoTEC Plus 937 VUI 376/5-5 R1 2012-2013 – GC No. 47-044-43 R1
- EcoTEC Plus 937 VUI 376/5-5 R2 2013-2014 – GC No. 47-044-43 R2
- EcoTEC Plus 937 VUI 376/5-5 R4 2014-2015 – GC No. 47-044-43 R4
- EcoTEC Plus 938 VUI 286/5-5 R6 2017 Onwards – GC No. 47-044-87 R6 (0010021827)
- EcoTEC Plus 938 VUI 386/5-5 R4 2015 Onwards – GC No. 47-044-61 R4
Vaillant EcoTEC Pro Series
- EcoTEC Pro 24 VUW 246/3-3 R1 2006-2008 – GC No. 47-044-36 R1
- EcoTEC Pro 24 VUW 246/3-3 R2 2008-2012 – GC No. 47-044-36 R2
- EcoTEC Pro 24 VUW 246/5-3 2012-2012 – GC No. 47-044-44
- EcoTEC Pro 24 VUW 246/5-3 R1 2012-2013 – GC No. 47-044-44 R1
- EcoTEC Pro 24 VUW 246/5-3 R2 2013-2015 – GC No. 47-044-44 R2
- EcoTEC Pro 24 VUW 246/5-3 R4 2015-2017 – GC No. 47-044-54
- EcoTEC Pro 24 VUW 246/5-3 R4 2015-2015 – GC No. 47-044-44 R4
- EcoTEC Pro 24 VUW 246/5-3 R6 2017 Onwards – GC No. 47-044-88 (0010021836)
- EcoTEC Pro 28 VUW 286/3-3 R1 2005-2008 – GC No. 47-044-30 R1
- EcoTEC Pro 28 VUW 286/3-3 R2 2008-2012 – GC No. 47-044-30 R2
- EcoTEC Pro 28 VUW 286/5-3 LPG – GC No. 47-044-47
- EcoTEC Pro 28 VUW 286/5-3 NG – GC No. 47-044-45
- EcoTEC Pro 28 VUW 286/5-3 R1 LPG – GC No. 47-044-47 R1
- EcoTEC Pro 28 VUW 286/5-3 R1 NG – GC No. 47-044-45 R1
- EcoTEC Pro 28 VUW 286/5-3 R2 LPG – GC No. 47-044-47 R2
- EcoTEC Pro 28 VUW 286/5-3 R2 NG – GC No. 47-044-45 R2
- EcoTEC Pro 28 VUW 286/5-3 R4 2015-2017 – GC No. 47-044-55 (0010018495)
- EcoTEC Pro 28 VUW 286/5-3 R4 2015-2017 LPG – GC No. 47-044-56 (0010018496)
- EcoTEC Pro 28 VUW 286/5-3 R6 2017 Onwards – GC No. 47-044-89 (0010021837)
- EcoTEC Pro 28 VUW 286/5-3 R6 LPG 2017 Onwards – GC No. 47-044-90 (0010021838)
- EcoTEC Pro 30 VUW 306/5-3 R4 2015 Onwards – GC No. 47-044-52
Please note:Â Before placing your order for Vaillant diverter valve please check your part matches the Manufacturer Part Number
For any other Vaillant Diverter valves
For any Vaillant spares
     Prices: Please note all prices are with VAT.










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