Nefit (Bosch) TopLine Compact HRC 25 CW4 spare parts

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In brief

Instalpunt supplies 103 original parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4, including fans, sensors, pressure sensors. Order online.

103Spare parts
65In stock
€3.53From
21Types
availableExploded view

Looking for parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (boiler)? Below are all 103 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 →

Quick left to the right part for the Nefit (Bosch) TopLine Compact HRC 25 CW4

Part	From	Delivery
Fan Nefit fan for TopLine	€343.93	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Pressure sensor Nefit pressure sensor with click connection for TopLine and ProLine etc.	€62.59	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Flow sensor Nefit flow sensor for TrendLine and ProLine etc.	€21.55	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Pump Nefit pump UPMO 6M NES 9H pwm for TopLine	€281.83	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Heat exchanger Nefit plate heat exchanger for e.g. TopLine Compact HRC 30 CW5 74580	€118.21	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).
Burner control unit Nefit burner control unit UBA 3.5 for TopLine	€233.77	In-stock items usually arrive within 3–5 working days, made-to-order items within 5–7 working days (a longer lead time is shown on the product page).

Prices incl. VAT, taken directly from our checkout. Below is the complete parts list for this model.

Installer or self-employed engineer? Create a business account: prices excl. VAT and invoices in your company name.

Fans for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) fans →

Part	Item no. / mfr. no.	Price	Stock
Nefit fan for TopLine	8026786 Mfr. no. 74589	€343.93	In stock	View & order
Rewind reconditioned fan for Bosch Topline Aquapower HR(C) (74589)	8930172	€262.39	In stock	View & order

Sensors for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) sensors →

Part	Item no. / mfr. no.	Price	Stock
Nefit safety sensor for TopLine	8026766 Mfr. no. 7101532	€48.55	In stock	View & order
Nefit flow/return sensor for Smartline basic and Topline	8026784 Mfr. no. 7101578	€31.27	In stock	View & order

Pressure sensors for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1) all Nefit (Bosch) pressure sensors →

Part	Item no. / mfr. no.	Price	Stock
Nefit pressure sensor with click connection for TopLine and ProLine etc.	8026706 Mfr. no. 8718600019	€62.59	In stock	View & order

Flow sensors and flow switches for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1)

Part	Item no. / mfr. no.	Price	Stock
Nefit flow sensor for TrendLine and ProLine etc.	8027721 Mfr. no. 8738902350	€21.55	In stock	View & order

Pumps for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1) all Nefit (Bosch) pumps →

Part	Item no. / mfr. no.	Price	Stock
Nefit pump UPMO 6M NES 9H pwm for TopLine	8045276 Mfr. no. 8738903384	€281.83	In stock	View & order

Heat exchangers for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) heat exchangers →

Part	Item no. / mfr. no.	Price	Stock
Nefit plate heat exchanger for e.g. TopLine Compact HRC 30 CW5 74580	8026832 Mfr. no. 74580	€118.21	In stock	View & order
Nefit heat exchanger for Topline 15-30 kW	8028940 Mfr. no. 7736700367	€1,170.67	In stock	View & order

Gas valves and gas control for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) gas valves and gas control →

Part	Item no. / mfr. no.	Price	Stock
Nefit venturi for TopLine and TrendLine etc.	8026835 Mfr. no. 7099925	€40.99	In stock	View & order
Nefit gas control valve SIT 848 848122	8029161 Mfr. no. 7736700635	€171.67	In stock	View & order

PCBs and controls for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1) all Nefit (Bosch) PCBs and controls →

Part	Item no. / mfr. no.	Price	Stock
Nefit control panel PCB 74594 for TopLine	8029810 Mfr. no. 7736701383	€258.07	In stock	View & order

Burner control units for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1) all Nefit (Bosch) burner control units →

Part	Item no. / mfr. no.	Price	Stock
Nefit burner control unit UBA 3.5 for TopLine	8026787 Mfr. no. 7736700530	€233.77	In stock	View & order

Diverter valves and hydroblocks for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (3) all Nefit (Bosch) diverter valves and hydroblocks →

Part	Item no. / mfr. no.	Price	Stock
Nefit three-way valve insert for TopLine	8029085 Mfr. no. 7099576	€62.59	In stock	View & order
Nefit hydroblock flow	8026821 Mfr. no. 74554	€51.79	In stock	View & order
Nefit hydroblock return	8026827 Mfr. no. 74556	€61.51	In stock	View & order

Siphons and condensate drains for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Nefit siphon for TopLine (e.g. TopLine Compact HRC 30 CW5) 7746700064	8026809 Mfr. no. 7746700064	€18.31	In stock	View & order
Nefit condensate tray 25/30 kW for TopLine	8026830 Mfr. no. 8718600052	€114.97	In stock	View & order

Burners for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) burners →

Part	Item no. / mfr. no.	Price	Stock
Nefit burner set complete TopLine 25/30 kW	8027467 Mfr. no. 8738901094	€140.89	In stock	View & order
Nefit burner with gas distribution plate + gasket for Topline 25/30 kW after 9-2009	8028724 Mfr. no. 8718600206	€101.47	In stock	View & order

Filters for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (1) all Nefit (Bosch) filters →

Part	Item no. / mfr. no.	Price	Stock
Nefit filter for e.g. TrendLine HRC25 CW4 7746900085	8026801 Mfr. no. 7746900085	€35.59	Made-to-order item	View & order

Maintenance and service kits for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) maintenance and service kits →

Part	Item no. / mfr. no.	Price	Stock
Nefit glow plug / ionisation pin 15-45 kW service kit TopLine	8028937 Mfr. no. 7736700318	€94.99	In stock	View & order
Nefit gasket set C Topline I/II HR/HRC 25/30	81901149 Mfr. no. 8738901296	€76.63	In stock	View & order

Valves for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (4) all Nefit (Bosch) valves →

Part	Item no. / mfr. no.	Price	Stock
Nefit automatic air vent	8026707 Mfr. no. 7101428	€28.03	In stock	View & order
Nefit flow restrictor old number: 78138	8027353 Mfr. no. 7101630	€64.75	In stock	View & order
Nefit non-return valve	8021351 Mfr. no. 8718601988	€22.63	In stock	View & order
Nefit non-return valve set for TopLine	8026807 Mfr. no. 74588	€46.39	Made-to-order item	View & order

Electrical parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (5) all Nefit (Bosch) electrical parts →

Part	Item no. / mfr. no.	Price	Stock
Nefit fuse 5 AF/230V 10 pcs old number: 7099473 for TopLine and TrendLine etc.	8026767 Mfr. no. 8718601966	€44.23	In stock	View & order
Nefit transformer UBA 3.5	8026824 Mfr. no. 74595	€60.43	In stock	View & order
Nefit connection terminal orange	8027318 Mfr. no. 73777	€36.67	Made-to-order item	View & order
Nefit connection terminal green	8027314 Mfr. no. 73773	€29.11	In stock	View & order
Nefit terminal connector red	8027317 Mfr. no. 73776	€36.67	Made-to-order item	View & order

Cables and wiring harnesses for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (2) all Nefit (Bosch) cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Nefit wiring harness 24V for TopLine (e.g. TopLine Compact HRC 30 CW5) 8718600250	8026831 Mfr. no. 8718600250	€112.27	In stock	View & order
Nefit wiring harness 230v	8026818 Mfr. no. 74573	€61.51	Made-to-order item	View & order

Gaskets and seals for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (20) all Nefit (Bosch) gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Nefit condensate tray gasket for 25/30 kW (TopLine)	8026789 Mfr. no. 74578	€13.99	In stock	View & order
Nefit sealing ring (5 pcs) for e.g. ProLine NxT HRC 24 CW4 8718600045	8028932 Mfr. no. 8718600045	€22.63	In stock	View & order
Nefit siphon gasket per 5 pcs for EcomLine and TopLine	8029545 Mfr. no. 7100742	€24.79	In stock	View & order
Nefit lip ring DN80	8026750 Mfr. no. 8738901447	€11.83	In stock	View & order
Nefit O-ring 21.82 x 3.53 mm 10 pcs (old number: 78157S)	8026790 Mfr. no. 7101574	€20.47	In stock	View & order
Nefit O-ring 16 x 3.5 mm 10 pcs (old number: 78158S)	8026791 Mfr. no. 7101620	€20.47	In stock	View & order
Nefit fan gasket for TopLine	8026799 Mfr. no. 74579	€19.39	In stock	View & order
Nefit gasket burner/combustion section 5 pcs for TopLine	8026816 Mfr. no. 7746900596	€46.39	In stock	View & order
Nefit O-ring 9.19 x 2.62 mm 10 pcs	8027370 Mfr. no. 78175S	€21.55	In stock	View & order
Nefit O-ring 9.92 x 2.62 mm 10 pcs	8027376 Mfr. no. 7101646	€28.03	In stock	View & order
Nefit O-ring heat exchanger 29.74 x 3.53 mm (10 pcs) for EcomLine and TopLine	8020257 Mfr. no. 7098986	€26.95	In stock	View & order
Nefit O-ring set restriction gas injector	8029186 Mfr. no. 7099018	€47.47	Made-to-order item	View & order
Nefit lip seal 50 mm 5 pcs	8029024 Mfr. no. 7099058	€43.15	In stock	View & order
Nefit lip seal siphon DN18 5 pcs old number: 73841S for TopLine and EcomLine	8028804 Mfr. no. 7100819	€21.55	In stock	View & order
Nefit O-ring Top 22/175-3 ZBS 10 pcs	8029340 Mfr. no. 87167711560	€8.59	In stock	View & order
Nefit O-ring 18 x 3 mm 5 pcs	8026851 Mfr. no. 7101644	€11.83	In stock	View & order
Nefit O-ring for e.g. TopLine Compact HRC 30 CW5 7101632	8029167 Mfr. no. 7101632	€11.83	Made-to-order item	View & order
Nefit O-ring 75 x 3 mm old number: 78177	8027361 Mfr. no. 7101588	€16.15	In stock	View & order
Nefit O-ring 24,2 x 3 per 5 pcs	8029546 Mfr. no. 7101626	€31.27	Made-to-order item	View & order
Nefit O-ring 48.9 x 2.62 mm old number: 78178	8027362 Mfr. no. 7101596	€23.71	Made-to-order item	View & order

Pipes, tubes and hoses for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (11) all Nefit (Bosch) pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Nefit siphon drain pipe for TopLine (e.g. TopLine Compact HRC 30 CW5) 74562	8026812 Mfr. no. 74562	€36.67	In stock	View & order
Nefit flue adapter	8026725 Mfr. no. 73936	€46.39	In stock	View & order
Nefit air intake pipe for e.g. TopLine Aquapower HRC 30 CW5 II 74576	8026820 Mfr. no. 74576	€63.67	Made-to-order item	View & order
Nefit flue pipe for e.g. TopLine Compact HRC 30 CW5 74584	8026825 Mfr. no. 74584	€61.51	In stock	View & order
Nefit gas pipe for e.g. TopLine Compact HRC 30 CW5 74568	8026826 Mfr. no. 74568	€91.75	Made-to-order item	View & order
Nefit CH connection nipple 22 mm	8026805 Mfr. no. 74557	€23.71	In stock	View & order
Nefit connection nipple hot water 15 mm	8026808 Mfr. no. 74558	€32.35	Made-to-order item	View & order
Nefit flow pipe extension	8026815 Mfr. no. 74560	€57.19	Made-to-order item	View & order
Nefit flow pipe for e.g. TopLine Compact HRC 30 CW5 74559	8026817 Mfr. no. 74559	€59.35	Made-to-order item	View & order
Nefit return pipe for e.g. TopLine Compact HRC 30 CW5 74583	8026819 Mfr. no. 74583	€62.59	Made-to-order item	View & order
Nefit connection piece fan/burner for TopLine	8026822 Mfr. no. 74591	€65.83	Made-to-order item	View & order

Casing and panels for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (6) all Nefit (Bosch) casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Nefit gas/air distribution plate with gasket for 25-30 kW after week 48/2009 (TopLine)	8027490 Mfr. no. 8718600208	€89.59	In stock	View & order
Nefit condensate tray upper section (old number: 73934) for TopLine	8026723 Mfr. no. 7101402	€18.31	In stock	View & order
Nefit service cap	8026798 Mfr. no. 74585	€19.39	In stock	View & order
Nefit three-way valve housing old number: 78233 for TopLine	8027368 Mfr. no. 7101598	€21.55	In stock	View & order
Nefit door for e.g. TopLine Compact HRC 30 CW5 74567	8026833 Mfr. no. 74567	€165.19	Made-to-order item	View & order
Nefit trim strip door for e.g. TopLine Compact HRC 30 CW5 74586	8026811 Mfr. no. 74586	€49.63	Made-to-order item	View & order

Fixing material for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (20) all Nefit (Bosch) fixing material →

Part	Item no. / mfr. no.	Price	Stock
Nefit plug old number: 78139	8027354 Mfr. no. 7101606	€20.47	In stock	View & order
Nefit air vent clip old number: 73973	8026756 Mfr. no. 7101430	€18.31	In stock	View & order
Nefit clamping spring 4x2 pcs	8026769 Mfr. no. 7746700063	€22.63	In stock	View & order
Nefit clamping bracket set	8027410 Mfr. no. 7746900186	€21.55	In stock	View & order
Nefit heat exchanger clip 2 pcs for TopLine	8026806 Mfr. no. 74565	€23.71	In stock	View & order
Nefit air intake pipe mounting bracket	8027380 Mfr. no. 7746900121	€18.31	In stock	View & order
Nefit clamping screw M5 2 pcs	8028935 Mfr. no. 8718600166	€18.31	In stock	View & order
Nefit clamp motor section three-way valve old number: 73687 for TopLine	8029087 Mfr. no. 7099580	€30.19	Made-to-order item	View & order
Nefit screw M5 x 16 mm 10 pcs old number: 73970	8026753 Mfr. no. 7101484	€29.11	Made-to-order item	View & order
Nefit screw 6.3 x 19 mm 10 pcs	8026762 Mfr. no. 73986	€29.11	Made-to-order item	View & order
Nefit countersunk screw M5 x 16 mm 10 pcs old number: 74597S	8026803 Mfr. no. 7746900595	€28.03	Made-to-order item	View & order
Nefit screw M5 x 30 mm 10 pcs old number: 78180S	8027373 Mfr. no. 7101586	€25.87	Made-to-order item	View & order
Nefit screw with sleeve 2 pcs old number: 78181S	8027374 Mfr. no. 7101622	€25.87	Made-to-order item	View & order
Nefit screw M5 10 pcs old number: 74596S 7100549	8027474 Mfr. no. 7746900594	€29.11	Made-to-order item	View & order
Nefit screw 4 x 20 mm Ejot 5 pcs	8020429 Mfr. no. 7101590	€11.83	Made-to-order item	View & order
Nefit condensate drain pipe bracket for TopLine	8027633 Mfr. no. 78207	€31.27	Made-to-order item	View & order
Nefit clamping spring for e.g. TopLine Compact HRC 30 CW5 7746900081	8026800 Mfr. no. 7746900081	€25.87	Made-to-order item	View & order
Nefit nut M5 10 pcs	8027375 Mfr. no. 78231S	€26.95	Made-to-order item	View & order
Nefit mounting plate pipes	8020703 Mfr. no. 7746900354	€36.67	Made-to-order item	View & order
Nefit wall bracket old number: 73965	8026749 Mfr. no. 7101386	€45.31	Made-to-order item	View & order

Other parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 (12)

Part	Item no. / mfr. no.	Price	Stock
Nefit three-way valve motor section VJ2012ZZ12B for TopLine	8029151 Mfr. no. 7099578	€93.91	In stock	View & order
Nefit hydraulic set	8029209 Mfr. no. 8718600139	€191.11	In stock	View & order
Nefit ClickOn sensor set for TopLine appliances up to 45kW	0110350 Mfr. no. 7736701727	€151.53	In stock	View & order
Nefit test nipple cap 2 pcs	8026726 Mfr. no. 7101424	€26.95	In stock	View & order
Nefit venturi sealing rings 5 pcs for TopLine and TrendLine etc.	8029542 Mfr. no. 7099021	€36.67	In stock	View & order
Nefit sealing cap set	8021313 Mfr. no. 7746900501	€31.27	Made-to-order item	View & order
Nefit brand badge Nefit for e.g. TrendLine HRC25 CW4 8718600735	8029383 Mfr. no. 8718600735	€28.03	Made-to-order item	View & order
Nefit slide strip	8026804 Mfr. no. 74570	€29.11	Made-to-order item	View & order
Nefit cable entry grommets (5x)	8020863 Mfr. no. 7098976	€46.39	Made-to-order item	View & order
Nefit air sealing cap	8026814 Mfr. no. 74575	€57.19	Made-to-order item	View & order
Nefit door seal rubber	8029646 Mfr. no. 8718600350	€34.51	Made-to-order item	View & order
Nefit gas supply restrictor	8026802 Mfr. no. 74582	€29.11	Made-to-order item	View & order

Exploded views of the Nefit (Bosch) TopLine Compact HRC 25 CW4

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

Nefit (Bosch) TopLine Compact HRC 25 CW4 error codes

Is there a code on the display? For each code: what it means for this series, what you can check yourself and which part is usually needed.

Fault code on your Nefit (Bosch) TopLine Compact HRC 25 CW4? This is the part type involved

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

Code	What is going on	Part type
0C 283	The boiler is preparing for a burner start. The fan and pump are activated.	Fans
0L 284	The gas control valve is activated.	Gas valves and gas control
0Y 276	The flow temperature sensor has measured a temperature higher than 95°C.	Sensors
0Y 277	The safety temperature sensor has measured a temperature higher than 95°C.	Sensors
0Y 285	The return temperature sensor has measured a temperature higher than 95°C.	Sensors
1A 316	The flue gas temperature sensor has measured an excessive temperature.	Sensors

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

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Frequently asked questions

Which parts are available for the Nefit (Bosch) TopLine Compact HRC 25 CW4?

The catalogue lists 103 original parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4, including fans, sensors, pressure sensors, flow sensors and flow switches. All parts are listed above, grouped by type, with part number and price.

How much does a fan for the Nefit (Bosch) TopLine Compact HRC 25 CW4 cost?

The fans for this model cost €444.57 incl. VAT. Check the table "Fans" above for the right part number.

Are the parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 in stock?

65 of the 103 parts are in stock; shipping to EU countries from €12.95 (€16.95 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 Nefit (Bosch) TopLine Compact HRC 25 CW4?

Search for the part by part number or use the exploded view of the Nefit (Bosch) TopLine Compact HRC 25 CW4.

Are these original Nefit (Bosch) parts?

Yes. All 103 parts in this list are original manufacturer parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4, delivered with the correct part number.

How much do parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 cost?

Parts for the Nefit (Bosch) TopLine Compact HRC 25 CW4 range from €3.53 to €1,682.32 incl. VAT. The exact price of each part is shown in the tables above.

Can I return a part?

As a consumer you have a 14-day right of withdrawal. You may unpack and inspect the part; do not install or connect it. For a part that has been installed, connected or damaged we deduct the diminished value, up to the full price for circuit boards.