Nefit (Bosch) TopLine HR 45 spare parts

Find your Nefit part

Choose your appliance step by step

1 Brand

2 Application

3 Type / series

4 Type of part

Or search directly

By part number, appliance type or name

Popular brands

Loading catalogue…

In brief

Instalpunt supplies 96 original parts for the Nefit (Bosch) TopLine HR 45, including fans, sensors, pressure sensors. Order online.

96Spare parts
61In stock
€7.06From
18Types
availableExploded view

Looking for parts for the Nefit (Bosch) TopLine HR 45 (boiler)? Below are all 96 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 HR 45

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).
Pump Nefit pump AGRE2W 7MH CH 3H 8738900751 for TopLine	€286.15	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 heat exchanger for Topline 45 kW	€1,336.99	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 2
Sensors 2
Pressure sensors 1
Pumps 1
Heat exchangers 1
Gas valves and gas control 2
PCBs and controls 1
Burner control units 1
Siphons and condensate drains 2
Burners 2
Maintenance and service kits 2
Valves 3
Electrical parts 9
Cables and wiring harnesses 2
Gaskets and seals 17
Pipes, tubes and hoses 11
Casing and panels 6
Fixing material 16
Other parts 15

Fans for the Nefit (Bosch) TopLine HR 45 (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 HR 45 (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 HR 45 (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

Pumps for the Nefit (Bosch) TopLine HR 45 (1) all Nefit (Bosch) pumps →

Part	Item no. / mfr. no.	Price	Stock
Nefit pump AGRE2W 7MH CH 3H 8738900751 for TopLine	80200136 Mfr. no. 8738900751	€286.15	In stock	View & order

Heat exchangers for the Nefit (Bosch) TopLine HR 45 (1) all Nefit (Bosch) heat exchangers →

Part	Item no. / mfr. no.	Price	Stock
Nefit heat exchanger for Topline 45 kW	8029341 Mfr. no. 7736700368	€1,336.99	In stock	View & order

Gas valves and gas control for the Nefit (Bosch) TopLine HR 45 (2) all Nefit (Bosch) gas valves and gas control →

Part	Item no. / mfr. no.	Price	Stock
Nefit gas control valve SIT 848 848122	8029161 Mfr. no. 7736700635	€171.67	In stock	View & order
Nefit venturi for 45kW (TopLine)	8027406 Mfr. no. 7746900148	€40.99	In stock	View & order

PCBs and controls for the Nefit (Bosch) TopLine HR 45 (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 HR 45 (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

Siphons and condensate drains for the Nefit (Bosch) TopLine HR 45 (2) all Nefit (Bosch) siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Nefit condensate tray for Topline 45-100 kW (old number: 73930)	8026719 Mfr. no. 7101396	€92.83	In stock	View & order
Nefit siphon for TopLine (e.g. TopLine Aquapower HRC 30 CW5 II) 8738808157	8200029 Mfr. no. 8738808157	€38.83	In stock	View & order

Burners for the Nefit (Bosch) TopLine HR 45 (2) all Nefit (Bosch) burners →

Part	Item no. / mfr. no.	Price	Stock
Nefit gas/air distribution plate with gasket 45 kW for TopLine	8027500 Mfr. no. 8718600209	€93.91	In stock	View & order
Nefit burner 45kW for TopLine	8028722 Mfr. no. 8718600207	€208.39	In stock	View & order

Maintenance and service kits for the Nefit (Bosch) TopLine HR 45 (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 D Topline I/II HR/HRC 45	81901150 Mfr. no. 8738901297	€76.63	In stock	View & order

Valves for the Nefit (Bosch) TopLine HR 45 (3) 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 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 HR 45 (9) 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 terminal connector blue	8027316 Mfr. no. 73775	€29.11	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 grey	8027315 Mfr. no. 73774	€36.67	Made-to-order item	View & order
Nefit terminal connector red	8027317 Mfr. no. 73776	€36.67	Made-to-order item	View & order
Nefit terminal connector turquoise old number: 73772	8027313 Mfr. no. 7746700126	€36.67	Made-to-order item	View & order
Nefit strain relief for e.g. 9000i AquaPower Plus HRC30 CW6 7746900268	8027445 Mfr. no. 7746900268	€25.87	Made-to-order item	View & order

Cables and wiring harnesses for the Nefit (Bosch) TopLine HR 45 (2) all Nefit (Bosch) cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Nefit wiring harness 230V incl. plug for TopLine	8027435 Mfr. no. 7746900258	€61.51	Made-to-order item	View & order
Nefit wiring harness 24V for TopLine (e.g. TopLine HR 45) 8718600256	8027432 Mfr. no. 8718600256	€148.99	Made-to-order item	View & order

Gaskets and seals for the Nefit (Bosch) TopLine HR 45 (17) all Nefit (Bosch) gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Nefit condensate tray gasket for Topline 45-100 kW	8027409 Mfr. no. 7746900152	€20.47	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 pump gasket 1" DN25 30 x 23 x 2 mm (set of 10 pcs) for TopLine	8029035 Mfr. no. 7099176	€35.59	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 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	€36.67	In stock	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 36.09 x 3.53 mm 10 pcs old number: 73972	8026755 Mfr. no. 7101488	€45.31	Made-to-order item	View & order
Nefit gasket 5 pcs for TopLine	8027454 Mfr. no. 7746900278	€19.39	In stock	View & order
Nefit seal gas pipe/frame	8028855 Mfr. no. 7746900127	€29.11	Made-to-order item	View & order
Nefit lip seal 125 mm old number: 7746900323	8029108 Mfr. no. 7736700058	€33.43	Made-to-order item	View & order

Pipes, tubes and hoses for the Nefit (Bosch) TopLine HR 45 (11) all Nefit (Bosch) pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Nefit siphon drain pipe for TopLine (e.g. TopLine Aquapower HRC 30 CW5 II) 7746900130	8027389 Mfr. no. 7746900130	€25.87	In stock	View & order
Nefit adapter TopLine Ø80-80mm parallel	0100425 Mfr. no. 74522	€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 flow pipe for e.g. TopLine Aquapower HRC 30 CW5 II 7746900123	8027382 Mfr. no. 7746900123	€50.71	In stock	View & order
Nefit return pipe for e.g. TopLine Aquapower HRC 30 CW5 II 7746900144	8027402 Mfr. no. 7746900144	€74.47	In stock	View & order
Nefit flue pipe for e.g. TopLine Aquapower HRC 30 CW5 II 7746900145	8027403 Mfr. no. 7746900145	€58.27	In stock	View & order
Nefit CH flow pipe for e.g. TopLine HR 45 II 7746900237	8027417 Mfr. no. 7746900237	€63.67	In stock	View & order
Nefit CH return pipe	8027449 Mfr. no. 7746900273	€50.71	In stock	View & order
Nefit gas pipe for e.g. TopLine HR 45 7746900137	8027395 Mfr. no. 7746900137	€101.47	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 HR 45 (6) all Nefit (Bosch) casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Nefit cover Topline 45 kW burner housing	8029189 Mfr. no. 8718600839	€183.55	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 connection plate electronics	8027413 Mfr. no. 7746900233	€32.35	Made-to-order item	View & order
Nefit cover cap connection plate	8027423 Mfr. no. 7746900244	€51.79	Made-to-order item	View & order
Nefit door for single	8027394 Mfr. no. 7746900136	€217.03	Made-to-order item	View & order
Nefit trim strip door for e.g. TopLine Aquapower HRC 30 CW5 II 7746900146	8027404 Mfr. no. 7746900146	€71.23	Made-to-order item	View & order

Fixing material for the Nefit (Bosch) TopLine HR 45 (16) all Nefit (Bosch) fixing material →

Part	Item no. / mfr. no.	Price	Stock
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 screw M5 x 16 mm 5 pcs	8027462 Mfr. no. 7746900310	€19.39	In stock	View & order
Nefit clamping screw M5 2 pcs	8028935 Mfr. no. 8718600166	€18.31	In stock	View & order
Nefit heat exchanger clip return side for TopLine	8027408 Mfr. no. 7746900150	€19.39	In stock	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 10 pcs old number: 74596S 7100549	8027474 Mfr. no. 7746900594	€29.11	Made-to-order item	View & order
Nefit flue holder	8020967 Mfr. no. 7746900342	€29.11	Made-to-order item	View & order
Nefit clamping spring 5 pcs old number: 79086S 7746900352	8027475 Mfr. no. 7100549	€45.31	Made-to-order item	View & order
Nefit wall bracket old number: 73965	8026749 Mfr. no. 7101386	€45.31	Made-to-order item	View & order
Nefit grommet 8718600616	8027465 Mfr. no. 7746900317	€25.87	Made-to-order item	View & order

Other parts for the Nefit (Bosch) TopLine HR 45 (15)

Part	Item no. / mfr. no.	Price	Stock
Nefit ClickOn sensor set for TopLine appliances up to 45kW	0110350 Mfr. no. 7736701727	€151.53	In stock	View & order
Nefit test nipple cap set	8029038 Mfr. no. 7099425	€17.23	In stock	View & order
Nefit pipe grommet frame white	8024490 Mfr. no. 73449	€22.63	In stock	View & order
Nefit pump swivel nut 1" old number: 73675 for TopLine	8029078 Mfr. no. 7099416	€18.31	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 for e.g. TopLine HR 45 II 7746900125	8027384 Mfr. no. 7746900125	€26.95	Made-to-order item	View & order
Nefit sealing cap modulating connection	8027385 Mfr. no. 7746900126	€29.11	Made-to-order item	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 insulation door single	8027397 Mfr. no. 7746900139	€97.15	Made-to-order item	View & order
Nefit cable entry grommets (5x)	8020863 Mfr. no. 7098976	€46.39	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 for 45kW	8027401 Mfr. no. 7746900143	€29.11	Made-to-order item	View & order

Exploded views of the Nefit (Bosch) TopLine HR 45

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

Nefit (Bosch) TopLine HR 45 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 HR 45? 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.

Other Nefit (Bosch) boilers

← All Nefit (Bosch) parts

Frequently asked questions

Which parts are available for the Nefit (Bosch) TopLine HR 45?

The catalogue lists 96 original parts for the Nefit (Bosch) TopLine HR 45, including fans, sensors, pressure sensors, pumps. All parts are listed above, grouped by type, with part number and price.

How much does a fan for the Nefit (Bosch) TopLine HR 45 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 HR 45 in stock?

61 of the 96 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 HR 45?

Search for the part by part number or use the exploded view of the Nefit (Bosch) TopLine HR 45.

Are these original Nefit (Bosch) parts?

Yes. All 96 parts in this list are original manufacturer parts for the Nefit (Bosch) TopLine HR 45, delivered with the correct part number.

How much do parts for the Nefit (Bosch) TopLine HR 45 cost?

Parts for the Nefit (Bosch) TopLine HR 45 range from €7.06 to €1,919.43 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.