Vaillant uniTOWER Split VWL 128/5 IS spare parts

In brief

Instalpunt supplies 128 original parts for the Vaillant uniTOWER Split VWL 128/5 IS, including sensors, pressure sensors, pumps. Order online.

128Spare parts
16In stock
€6.21From
20Types
availableExploded view

Looking for parts for the Vaillant uniTOWER Split VWL 128/5 IS (heat pump)? Below are all 128 original parts, grouped by part type, with the matching exploded view. Choose a type to jump straight to the right table.

View the interactive exploded view →

Sensors for the Vaillant uniTOWER Split VWL 128/5 IS (4) all Vaillant sensors →

Part	Item no. / mfr. no.	Price	Stock
Vaillant temperature sensor	8050664 Mfr. no. 0020148022	€34.95	In stock	View & order
Vaillant sensor for e.g. aroTHERM Pro VWL 75/7.1 A 230V 0020269357	80501001 Mfr. no. 0020269357	€22.95	In stock	View & order
Vaillant temperature limiter for e.g. uniTOWER Split VWL 78/5 IS 0020273388	80502052 Mfr. no. 0020273388	€140.95	In stock	View & order
Vaillant sensor for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020187358	8050581 Mfr. no. 0020187358	€47.95	Made-to-order item	View & order

Pressure sensors for the Vaillant uniTOWER Split VWL 128/5 IS (1)

Part	Item no. / mfr. no.	Price	Stock
Vaillant pressure sensor VHR18-22/3C24-28/3C VHR CW3 4/3 for ecoTEC plus and ecoTEC pro etc.	8058957 Mfr. no. 0020059717	€20.95	In stock	View & order

Pumps for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant pumps →

Part	Item no. / mfr. no.	Price	Stock
Vaillant pump for e.g. uniTOWER Split VWL 128/5 IS 0020269329	80501239 Mfr. no. 0020269329	€389.95	Made-to-order item	View & order

Heat exchangers for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant heat exchangers →

Part	Item no. / mfr. no.	Price	Stock
Vaillant condenser for e.g. uniTOWER Split VWL 128/5 IS 0020273865	80501250 Mfr. no. 0020273865	€539.95	Made-to-order item	View & order

PCBs and controls for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant PCBs and controls →

Part	Item no. / mfr. no.	Price	Stock
Vaillant PCB 0010033772 for uniTOWER VWL 58/5, 78/5 and 128/5 IS	80501677 Mfr. no. 0010033772	€330.95	Made-to-order item	View & order

Diverter valves and hydroblocks for the Vaillant uniTOWER Split VWL 128/5 IS (2) all Vaillant diverter valves and hydroblocks →

Part	Item no. / mfr. no.	Price	Stock
Vaillant three-way valve for e.g. uniTOWER Split VWL 78/5 IS 0020269335	80501144 Mfr. no. 0020269335	€117.95	In stock	View & order
Vaillant hydro block for e.g. uniTOWER Split VWL 78/5 IS 0020269337	80501109 Mfr. no. 0020269337	€59.95	Made-to-order item	View & order

Expansion vessels for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant expansion vessels →

Part	Item no. / mfr. no.	Price	Stock
Vaillant expansion vessel 15 litre	8050874 Mfr. no. 179048	€166.95	In stock	View & order

Siphons and condensate drains for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Vaillant condensate drain for e.g. uniTOWER Split VWL 78/5 IS 0020275081	80501472 Mfr. no. 0020275081	€97.95	Made-to-order item	View & order

Displays and controls for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant displays and controls →

Part	Item no. / mfr. no.	Price	Stock
Vaillant display for e.g. uniTOWER Split VWL 78/5 IS 0020269443	80501112 Mfr. no. 0020269443	€102.95	Made-to-order item	View & order

Valves for the Vaillant uniTOWER Split VWL 128/5 IS (6) all Vaillant valves →

Part	Item no. / mfr. no.	Price	Stock
Vaillant valve for e.g. aroTHERM VWL 55/3 A 230V 0020266437	80500985 Mfr. no. 0020266437	€24.95	In stock	View & order
Vaillant air vent for e.g. aroTHERM VWL 75/6 A 0020278074	80500932 Mfr. no. 0020278074	€35.95	In stock	View & order
Vaillant drain cock for e.g. uniTOWER VIH QW 190/1 E (0010019709) 082244	80500263 Mfr. no. 082244	€54.95	Made-to-order item	View & order
Vaillant valve, Schrader (x5)	80500948 Mfr. no. 0010027681	€29.95	Made-to-order item	View & order
Vaillant valve for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020174707	8050757 Mfr. no. 0020174707	€103.95	Made-to-order item	View & order
Vaillant service valve for e.g. uniSTOR VIH RW 200/2 B 0020187026	8050582 Mfr. no. 0020187026	€31.95	Made-to-order item	View & order

Anodes for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant anodes →

Part	Item no. / mfr. no.	Price	Stock
Vaillant anode for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020107795	8050851 Mfr. no. 0020107795	€93.95	Made-to-order item	View & order

Pressure gauges for the Vaillant uniTOWER Split VWL 128/5 IS (1) all Vaillant pressure gauges →

Part	Item no. / mfr. no.	Price	Stock
Vaillant pressure gauge for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233658	80500349 Mfr. no. 0020233658	€102.95	Made-to-order item	View & order

Motors for the Vaillant uniTOWER Split VWL 128/5 IS (2) all Vaillant motors →

Part	Item no. / mfr. no.	Price	Stock
Vaillant actuator for e.g. uniTOWER Split VWL 78/5 IS 0020273842	80501145 Mfr. no. 0020273842	€147.95	Made-to-order item	View & order
Vaillant service valve insulation	8050704 Mfr. no. 0020038596	€22.95	Made-to-order item	View & order

Electrical parts for the Vaillant uniTOWER Split VWL 128/5 IS (2) all Vaillant electrical parts →

Part	Item no. / mfr. no.	Price	Stock
Vaillant strain relief	8051468 Mfr. no. 078533	€44.95	Made-to-order item	View & order
Vaillant fuse 40at 10 pcs VHR10 to 45 for ecoTEC plus	8058553 Mfr. no. 251957	€28.95	Made-to-order item	View & order

Cables and wiring harnesses for the Vaillant uniTOWER Split VWL 128/5 IS (8) all Vaillant cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Vaillant cable for e.g. flexoTHERM VWF 87/4 0020210651	90170022 Mfr. no. 0020210651	€26.95	Made-to-order item	View & order
Vaillant wiring harness for e.g. aroTHERM Pro VWL 75/7.1 A 230V 0020210656	90170125 Mfr. no. 0020210656	€31.95	Made-to-order item	View & order
Vaillant wiring harness for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233615	80500086 Mfr. no. 0020233615	€24.95	Made-to-order item	View & order
Vaillant cable for e.g. uniTOWER VIH QW 190/6 E 0020275088	80500929 Mfr. no. 0020275088	€22.95	Made-to-order item	View & order
Vaillant cable for e.g. uniTOWER Split VWL 78/5 IS 0020266352	80500908 Mfr. no. 0020266352	€22.95	Made-to-order item	View & order
Vaillant wiring harness, 230V for e.g. uniTOWER Split VWL 78/5 IS 0020266324	80501061 Mfr. no. 0020266324	€62.95	Made-to-order item	View & order
Vaillant wiring harness, 24V for e.g. uniTOWER Split VWL 78/5 IS 0020266323	80501060 Mfr. no. 0020266323	€106.95	Made-to-order item	View & order
Vaillant connector, set 0010034415	80501844 Mfr. no. 0010034415	€44.95	Made-to-order item	View & order

Gaskets and seals for the Vaillant uniTOWER Split VWL 128/5 IS (9) all Vaillant gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Vaillant gasket 3/4" (10 pcs) for ecoTEC plus and ecoTEC pro etc.	8052292 Mfr. no. 981140	€15.95	In stock	View & order
Vaillant gasket 1/2" (10 pcs) for ecoTEC plus and ecoTEC pro etc.	8057027 Mfr. no. 981142	€14.95	In stock	View & order
Vaillant O-ring (10 pcs) for e.g. hrSOLIDE VHR 24-28 C 981163	8057046 Mfr. no. 981163	€14.95	In stock	View & order
Vaillant pump O-ring 23 x 3 mm 254/2XE 10 pcs	8055146 Mfr. no. 981234	€16.95	In stock	View & order
Vaillant O-ring 10 pcs for e.g. ecoTEC pure VHR 18-24/7-2 0020213151	80500070 Mfr. no. 0020213151	€30.95	Made-to-order item	View & order
Vaillant gasket ring 10 pcs for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020057559	80500011 Mfr. no. 0020057559	€27.95	Made-to-order item	View & order
Vaillant sealing ring per 10 pcs for ecoTEC plus and ecoTEC pro etc. (e.g. hrSOLIDE plus VHR 24-28/3-5 R3) 178993	8051419 Mfr. no. 178993	€21.95	Made-to-order item	View & order
Vaillant gasket (10 pcs) for e.g. uniTOWER Split VWL 78/5 IS 0020180085	8052945 Mfr. no. 0020180085	€22.95	Made-to-order item	View & order
Vaillant sealing ring for e.g. uniTOWER VIH QW 190/1 E (0010019709) 981254	8059792 Mfr. no. 981254	€49.95	Made-to-order item	View & order

Pipes, tubes and hoses for the Vaillant uniTOWER Split VWL 128/5 IS (25) all Vaillant pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Vaillant expansion vessel pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233622	80500218 Mfr. no. 0020233622	€39.95	In stock	View & order
Vaillant air vent nipple	8051596 Mfr. no. 140015	€22.95	Made-to-order item	View & order
Vaillant bend for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233659	80500225 Mfr. no. 0020233659	€53.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020204810	80500190 Mfr. no. 0020204810	€31.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233620	80500337 Mfr. no. 0020233620	€104.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233621	80500338 Mfr. no. 0020233621	€104.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233655	80500348 Mfr. no. 0020233655	€112.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233660	80500350 Mfr. no. 0020233660	€70.95	Made-to-order item	View & order
Vaillant nipple for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233649	80500094 Mfr. no. 0020233649	€26.95	Made-to-order item	View & order
Vaillant nipple for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233656	80500223 Mfr. no. 0020233656	€44.95	Made-to-order item	View & order
Vaillant pipe set L=1109+460	80500179 Mfr. no. 0020196301	€48.95	Made-to-order item	View & order
Vaillant T-piece for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233654	80500222 Mfr. no. 0020233654	€55.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020268340	80501081 Mfr. no. 0020268340	€65.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020278076	80501130 Mfr. no. 0020278076	€86.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266306	80501054 Mfr. no. 0020266306	€92.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266307	80501055 Mfr. no. 0020266307	€92.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266315	80501058 Mfr. no. 0020266315	€97.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266317	80501059 Mfr. no. 0020266317	€104.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266305	80501053 Mfr. no. 0020266305	€96.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266495	80501079 Mfr. no. 0020266495	€102.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266309	80501057 Mfr. no. 0020266309	€107.95	Made-to-order item	View & order
Vaillant pipe for e.g. uniTOWER Split VWL 78/5 IS 0020266308	80501056 Mfr. no. 0020266308	€124.95	Made-to-order item	View & order
Vaillant pipe for uniTOWER Split VWL 128/5 IS 0010028137	80501189 Mfr. no. 0010028137	€126.95	Made-to-order item	View & order
Vaillant pipe l=51	8050478 Mfr. no. 0020174300	€22.95	Made-to-order item	View & order
Vaillant pipe l=95 d=18	8050481 Mfr. no. 0020174252	€10.95	Made-to-order item	View & order

Casing and panels for the Vaillant uniTOWER Split VWL 128/5 IS (12) all Vaillant casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Vaillant protective cap for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233657	80500224 Mfr. no. 0020233657	€28.95	Made-to-order item	View & order
Vaillant logo plate for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233609	80500085 Mfr. no. 0020233609	€22.95	Made-to-order item	View & order
Vaillant side panel 200 L	80500493 Mfr. no. 0020188014	€193.95	Made-to-order item	View & order
Vaillant cover for e.g. uniTOWER Split VWL 78/5 IS 0020273385	80501013 Mfr. no. 0020273385	€51.95	Made-to-order item	View & order
Vaillant case for e.g. uniTOWER Split VWL 78/5 IS 0010028156	80501483 Mfr. no. 0010028156	€97.95	Made-to-order item	View & order
Vaillant diagnostic connector cover	8050301 Mfr. no. 0020136640	€22.95	Made-to-order item	View & order
Vaillant controller cover	8050344 Mfr. no. 0020136633	€28.95	Made-to-order item	View & order
Vaillant cover for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020141346	8050672 Mfr. no. 0020141346	€31.95	Made-to-order item	View & order
Vaillant front panel door	8050878 Mfr. no. 0020188019	€147.95	Made-to-order item	View & order
Vaillant front panel for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020188017	8050879 Mfr. no. 0020188017	€254.95	Made-to-order item	View & order
Vaillant front panel for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020188018	8054434 Mfr. no. 0020188018	€375.95	Made-to-order item	View & order
Vaillant side panel top	8050882 Mfr. no. 0020188015	€182.95	Made-to-order item	View & order

Insulation for the Vaillant uniTOWER Split VWL 128/5 IS (6) all Vaillant insulation →

Part	Item no. / mfr. no.	Price	Stock
Vaillant insulation for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233637	80500089 Mfr. no. 0020233637	€26.95	Made-to-order item	View & order
Vaillant insulation for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020233648	80500093 Mfr. no. 0020233648	€27.95	Made-to-order item	View & order
Vaillant insulation, (2 pcs)	80500924 Mfr. no. 0020273331	€22.95	Made-to-order item	View & order
Vaillant insulation (4 pcs)	80501014 Mfr. no. 0020275082	€31.95	Made-to-order item	View & order
Vaillant insulation for e.g. uniTOWER Split VWL 78/5 IS 0020269333	80500999 Mfr. no. 0020269333	€43.95	Made-to-order item	View & order
Vaillant insulation (set) for uniTOWER Split VWL 128/5 IS 0020278353	80501018 Mfr. no. 0020278353	€48.95	Made-to-order item	View & order

Fixing material for the Vaillant uniTOWER Split VWL 128/5 IS (30) all Vaillant fixing material →

Part	Item no. / mfr. no.	Price	Stock
Vaillant retainer for e.g. hrSOLIDE plus VHR 24-28/3-5 R3 0020107694	8050116 Mfr. no. 0020107694	€26.95	In stock	View & order
Vaillant screw 0020073877, 10 pcs	8055017 Mfr. no. 0020073877	€10.95	Made-to-order item	View & order
Vaillant clamp set 10 pcs VHR35VC/W../3CWK245/3	8056607 Mfr. no. 219622	€46.95	Made-to-order item	View & order
Vaillant retaining spring per 10 pcs for e.g. hrSOLIDE plus VHR 24-28/3-5 R3 103417	8051439 Mfr. no. 103417	€36.95	In stock	View & order
Vaillant screw 0020136643, 10 pcs	8050297 Mfr. no. 0020136643	€21.95	Made-to-order item	View & order
Vaillant screw epp	8050684 Mfr. no. 0020093237	€31.95	Made-to-order item	View & order
Vaillant screw 0020173984, 10 pcs	8053905 Mfr. no. 0020173984	€21.95	Made-to-order item	View & order
Vaillant screw 0020218206	90170036 Mfr. no. 0020218206	€22.95	Made-to-order item	View & order
Vaillant clip for e.g. ecoTEC plus VHR 35/40 CS/1-5 0020204813	80500056 Mfr. no. 0020204813	€25.95	Made-to-order item	View & order
Vaillant nut M10 10 pcs	80500334 Mfr. no. 0020233610	€55.95	Made-to-order item	View & order
Vaillant screw 0020233638, 10 pcs	80500090 Mfr. no. 0020233638	€26.95	Made-to-order item	View & order
Vaillant plug for e.g. ecoTEC plus VHR 35/40 CS/1-5 0020210117	80500059 Mfr. no. 0020210117	€10.95	Made-to-order item	View & order
Vaillant plug for e.g. ecoTEC plus VHR 35/40 CS/1-5 0020213894	80500079 Mfr. no. 0020213894	€21.95	Made-to-order item	View & order
Vaillant clamp (10 pcs) for e.g. uniTOWER Split VWL 78/5 IS 0020273844	80500926 Mfr. no. 0020273844	€27.95	Made-to-order item	View & order
Vaillant clamp, (10 pcs) for e.g. aroTHERM Split plus VWL 55/8.2 AS 230V 0020266327	80500905 Mfr. no. 0020266327	€25.95	Made-to-order item	View & order
Vaillant clamp (10 pcs) for e.g. uniTOWER Split VWL 78/5 IS 0020266312	80500904 Mfr. no. 0020266312	€26.95	Made-to-order item	View & order
Vaillant clip, (5 pcs)	80501003 Mfr. no. 0020269433	€26.95	Made-to-order item	View & order
Vaillant clamping band, (5 pcs)	80500980 Mfr. no. 0020266330	€27.95	Made-to-order item	View & order
Vaillant holder (4 pcs)	80500971 Mfr. no. 0020257449	€26.95	Made-to-order item	View & order
Vaillant holder for e.g. uniTOWER Split VWL 78/5 IS 0020269320	80500998 Mfr. no. 0020269320	€28.95	Made-to-order item	View & order
Vaillant clip (10 pcs) for e.g. uniTOWER Split VWL 78/5 IS 0020269434	80501004 Mfr. no. 0020269434	€49.95	Made-to-order item	View & order
Vaillant screw connection for e.g. uniTOWER Split VWL 78/5 IS 0020269331	80501108 Mfr. no. 0020269331	€55.95	Made-to-order item	View & order
Vaillant case holder	80501374 Mfr. no. 0010028162	€44.95	Made-to-order item	View & order
Vaillant retaining spring per 10 pcs for e.g. hrSOLIDE plus VHR 24-28/3-5 R3 178992	8051436 Mfr. no. 178992	€44.95	Made-to-order item	View & order
Vaillant clip (10 pcs) for e.g. ecoTEC plus VHR 35/40 CS/1-5 0020174521	8051602 Mfr. no. 0020174521	€25.95	Made-to-order item	View & order
Vaillant case holder 2 pcs	8050308 Mfr. no. 0020144611	€22.95	Made-to-order item	View & order
Vaillant ring handle	8059535 Mfr. no. 0020038755	€25.95	Made-to-order item	View & order
Vaillant closure (4 pcs)	8053998 Mfr. no. 0020196308	€55.95	Made-to-order item	View & order
Vaillant plug for e.g. hrPRO CW 3/3 0020020488	8059490 Mfr. no. 0020020488	€22.95	Made-to-order item	View & order
Vaillant plug for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020186861	8054036 Mfr. no. 0020186861	€22.95	Made-to-order item	View & order

Other parts for the Vaillant uniTOWER Split VWL 128/5 IS (13)

Part	Item no. / mfr. no.	Price	Stock
Vaillant uniTOWER buffer tank 18 litre	1120106 Mfr. no. 0020269273	€453.95	In stock	View & order
Vaillant storage cylinder 200L	80500522 Mfr. no. 0020233650	€1,620.95	Made-to-order item	View & order
Vaillant connection 3/8	80500910 Mfr. no. 0020266457	€25.95	Made-to-order item	View & order
Vaillant connection 5/8	80500988 Mfr. no. 0020266458	€28.95	Made-to-order item	View & order
Vaillant backup heater for e.g. uniTOWER VIH QW 190/6 E 0020269324	80501238 Mfr. no. 0020269324	€551.95	Made-to-order item	View & order
Vaillant PCB, BUHCU	80508294 Mfr. no. 0010027772	€186.95	Made-to-order item	View & order
Vaillant nut set of 10 pcs	80502235 Mfr. no. 0010046205	€10.95	Made-to-order item	View & order
Vaillant spacer set of 2 pcs	80502220 Mfr. no. 0010045968	€21.95	Made-to-order item	View & order
Vaillant retainer 10 pcs MAG11-2/014-2/017-2/0 for e.g. aroTHERM VWL 75/6 A 108601	8056706 Mfr. no. 108601	€32.95	Made-to-order item	View & order
Vaillant instrument panel for e.g. uniTOWER VIH QW 190/1 E (0010019709) 0020198238	8052166 Mfr. no. 0020198238	€64.95	Made-to-order item	View & order
Vaillant adjustable foot	8054027 Mfr. no. 0020198221	€21.95	Made-to-order item	View & order
Vaillant adapter piece for e.g. uniTOWER VIH QW 190/1 E (0010019709) 179053	8050567 Mfr. no. 179053	€23.95	Made-to-order item	View & order
Vaillant restrictor	8050721 Mfr. no. 117215	€56.95	Made-to-order item	View & order

Exploded views of the Vaillant uniTOWER Split VWL 128/5 IS

Click an exploded view to enlarge it. The position numbers are shown next to each part.

Fault code on your Vaillant uniTOWER Split VWL 128/5 IS? This is the part type involved

Common Vaillant fault codes and the part type that is usually the cause; the parts for this model are listed above. All codes explained: Vaillant fault codes.

Code	What is going on	Part type
F.00	The flow temperature sensor signal is interrupted.	Sensors
F.01	The return temperature sensor signal is interrupted.	Sensors
F.02	The hot water connection temperature sensor signal is interrupted.	Sensors
F.022	Pressure loss in the heating circuit due to a leak or air lock, heating circuit pressure sensor defective	Sensors
F.03	The cylinder temperature sensor signal is interrupted.	Sensors
F.042	Break in the heat exchanger wiring harness	Heat exchangers

For guidance only: the same code can have a different cause depending on the situation.

Other Vaillant heat pumps

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Frequently asked questions

Which parts are available for the Vaillant uniTOWER Split VWL 128/5 IS?

The catalogue lists 128 original parts for the Vaillant uniTOWER Split VWL 128/5 IS, including sensors, pressure sensors, pumps, heat exchangers. All parts are listed above, grouped by type, with part number and price.

How much does a sensor for the Vaillant uniTOWER Split VWL 128/5 IS cost?

The sensors for this model cost between €20.26 and €182.95 incl. VAT. Check the table "Sensors" above for the right part number.

Are the parts for the Vaillant uniTOWER Split VWL 128/5 IS in stock?

16 of the 128 parts are in stock; shipping to EU countries from €17.95 (€24.95 for more distant countries), usually 3–5 working days. Parts marked "Made-to-order item" are ordered specially for you; the delivery time is shown on the product page.

How do I know which part I need for the Vaillant uniTOWER Split VWL 128/5 IS?

Search for the part by part number or use the exploded view of the Vaillant uniTOWER Split VWL 128/5 IS.

Are these original Vaillant parts?

Yes. All 128 parts in this list are original manufacturer parts for the Vaillant uniTOWER Split VWL 128/5 IS, supplied through the official technical wholesale channel and with the correct part number.

How much do parts for the Vaillant uniTOWER Split VWL 128/5 IS cost?

Parts for the Vaillant uniTOWER Split VWL 128/5 IS range from €6.21 to €2,134.00 incl. VAT. The exact price of each part is shown in the tables above.

Can I return a part?

You have a 14-day right of withdrawal. Return unused parts, in their original packaging where possible; details are in our returns conditions.