Atag Q25SR | from 2020 OSS1 spare parts

In brief

Instalpunt supplies 98 original parts for the Atag Q25SR | from 2020 OSS1, including fans, temperature sensors and NTC sensors, pressure sensors. Order online.

98Spare parts
55In stock
€18.95From
19Types
availableExploded view

Looking for parts for the Atag Q25SR | from 2020 OSS1 (boiler)? Below are all 98 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 Atag Q25SR | from 2020 OSS1

Part	From	Delivery
Fan Atag fan 230V	€305.95	In stock
Ignition part Atag ignition cable set	€53.95	In stock
Pressure sensor Atag water pressure sensor Huba	€114.45	In stock
Temperature sensor Atag NTC return 10K	€38.95	In stock

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 Atag Q25SR | from 2020 OSS1 (2) all Atag fans →

Part	Item no. / mfr. no.	Price	Stock
Atag fan 230V	8139182 Mfr. no. S4742800	€305.95	In stock	View & order
Rewind refurbished fan for Atag A/E series (S4742800)	8930071	€239.95	In stock	View & order

Temperature sensors and NTC sensors for the Atag Q25SR | from 2020 OSS1 (2) all Atag temperature sensors and NTC sensors →

Part	Item no. / mfr. no.	Price	Stock
Atag NTC return 10K	8139178 Mfr. no. S4746000	€38.95	In stock	View & order
Atag NTC flow 10K	8139180 Mfr. no. S4745900	€50.95	In stock	View & order

Pressure sensors for the Atag Q25SR | from 2020 OSS1 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag water pressure sensor Huba	8135490 Mfr. no. S4466300	€114.45	In stock	View & order

Pumps for the Atag Q25SR | from 2020 OSS1 (1) all Atag pumps →

Part	Item no. / mfr. no.	Price	Stock
Atag pump upm 20-70 q	8139840 Mfr. no. S4746300	€585.95	Made-to-order item	View & order

Gas valves and gas control for the Atag Q25SR | from 2020 OSS1 (3) all Atag gas valves and gas control →

Part	Item no. / mfr. no.	Price	Stock
Atag gas control block	8139183 Mfr. no. S4751900	€208.95	In stock	View & order
Atag venturi SHR24 for OSS1	8139089 Mfr. no. S4318810	€102.95	In stock	View & order
Atag gas pipe cpl. qss1 S4722200	8135638 Mfr. no. S4722200	€95.95	Made-to-order item	View & order

Burner control units for the Atag Q25SR | from 2020 OSS1 (1) all Atag burner control units →

Part	Item no. / mfr. no.	Price	Stock
Atag burner control unit LMS14 Mini + stick S4999510	8130018 Mfr. no. S4999510	€574.95	Made-to-order item	View & order

Ignition and ionisation for the Atag Q25SR | from 2020 OSS1 (3) all Atag ignition and ionisation →

Part	Item no. / mfr. no.	Price	Stock
Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009	8138101 Mfr. no. S4710100	€104.45	In stock	View & order
Atag ignition transformer	8138546 Mfr. no. S4851000	€64.95	Made-to-order item	View & order
Atag ignition cable set	8138559 Mfr. no. S4863800	€53.95	In stock	View & order

Siphons and condensate drains for the Atag Q25SR | from 2020 OSS1 (1) all Atag siphons and condensate drains →

Part	Item no. / mfr. no.	Price	Stock
Atag siphon complete SHR	8136240 Mfr. no. S4451610	€71.95	In stock	View & order

Burners for the Atag Q25SR | from 2020 OSS1 (1) all Atag burners →

Part	Item no. / mfr. no.	Price	Stock
Atag burner cassette assy. 25kW for OSS1	8138102 Mfr. no. S4714600	€125.95	In stock	View & order

Displays and controls for the Atag Q25SR | from 2020 OSS1 (1) all Atag displays and controls →

Part	Item no. / mfr. no.	Price	Stock
Atag rotary knob AVS37 S4967500	8135611 Mfr. no. S4967500	€47.95	Made-to-order item	View & order

Filters for the Atag Q25SR | from 2020 OSS1 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag water filter	8136265 Mfr. no. S4317500	€48.95	Made-to-order item	View & order

Valves for the Atag Q25SR | from 2020 OSS1 (3) all Atag valves →

Part	Item no. / mfr. no.	Price	Stock
Atag safety relief valve Duco 3 bar	8135200 Mfr. no. S4344630	€42.45	In stock	View & order
Atag automatic air vent chrome SHR for OSS1/2/3/4	8135041 Mfr. no. S4419110	€64.95	In stock	View & order
Atag fill and drain valve 1/2"	8132060 Mfr. no. S1002200	€54.95	Made-to-order item	View & order

Electrical parts for the Atag Q25SR | from 2020 OSS1 (1) all Atag electrical parts →

Part	Item no. / mfr. no.	Price	Stock
Atag fuse 6,3 at h 250v (3 x )	8139872 Mfr. no. S4823100	€28.95	Made-to-order item	View & order

Cables and wiring harnesses for the Atag Q25SR | from 2020 OSS1 (13) all Atag cables and wiring harnesses →

Part	Item no. / mfr. no.	Price	Stock
Atag spark plug cable	8135070 Mfr. no. S4323800	€52.95	In stock	View & order
Atag plug 2-pole black	8135380 Mfr. no. S4320500	€28.95	Made-to-order item	View & order
Atag earth cable ignition	8139223 Mfr. no. S4723200	€24.95	In stock	View & order
Atag connecting cable AVS37-LMS S4869700	8135619 Mfr. no. S4869700	€51.95	Made-to-order item	View & order
Atag wiring harness cpl. conn. bl. qr S4967600	8135675 Mfr. no. S4967600	€238.95	Made-to-order item	View & order
Atag ionisation cable for e.g. Q38C S4323900	8135160 Mfr. no. S4323900	€55.95	Made-to-order item	View & order
Atag plug 2-pole purple	8135360 Mfr. no. S4320300	€28.95	Made-to-order item	View & order
Atag plug 3-pole yellow	8139101 Mfr. no. S4379500	€31.95	Made-to-order item	View & order
Atag plug 3-pole grey	8139103 Mfr. no. S4380900	€31.95	Made-to-order item	View & order
Atag plug 3-pole green	8135390 Mfr. no. S4351300	€31.95	Made-to-order item	View & order
Atag plug 3-pole orange	8139102 Mfr. no. S4379600	€31.95	Made-to-order item	View & order
Atag plug 4-pole brown S4320600	8135400 Mfr. no. S4320600	€30.95	Made-to-order item	View & order
Atag plug 6-pole blue	8135410 Mfr. no. S4350600	€44.95	Made-to-order item	View & order

Gaskets and seals for the Atag Q25SR | from 2020 OSS1 (24) all Atag gaskets and seals →

Part	Item no. / mfr. no.	Price	Stock
Atag O-ring siphon R 46 x 3 mm	8135190 Mfr. no. S4309900	€30.95	Made-to-order item	View & order
Atag O-ring siphon/pipe	8131367 Mfr. no. S4316300	€44.95	Made-to-order item	View & order
Atag O-ring condensate tray/siphon	8131368 Mfr. no. S4316400	€23.95	In stock	View & order
Atag sealing ring gas valve/venturi for OSS1/2/3/4	8139033 Mfr. no. S4337610	€24.95	In stock	View & order
Atag sealing ring venturi/fan for OSS1/2/3/4	8139034 Mfr. no. S4325610	€24.95	In stock	View & order
Atag lip ring outlet stub	8139019 Mfr. no. S4472600	€24.95	In stock	View & order
Atag O-ring 2 pcs	8131119 Mfr. no. S4312300	€26.95	In stock	View & order
Atag lip seal Ø63mm AMGAS for OSS1/2/3/4	8137005 Mfr. no. S4307900	€22.95	In stock	View & order
Atag pump gasket 3/4" DN20 R38x25x2 mm 2 pcs	8130150 Mfr. no. S1003810	€21.95	In stock	View & order
Atag gasket condensate/air box	8130125 Mfr. no. S4339110	€33.95	In stock	View & order
Atag gasket	8135156 Mfr. no. S4323710	€23.95	In stock	View & order
Atag seal heat exchanger/upper tray 25 kW for OSS1	8138115 Mfr. no. S4709100	€34.95	In stock	View & order
Atag seal lower tray 25kW	8138116 Mfr. no. S4709500	€22.95	In stock	View & order
Atag seal burner bed/upper tray Q25 for OSS1	8138118 Mfr. no. S4717200	€35.95	In stock	View & order
Atag sealing ring intake fan SHR for OSS1/2/3/4	8135246 Mfr. no. S4309500	€22.95	In stock	View & order
Atag gasket fan mouth SHR for OSS1/2/3/4	8135270 Mfr. no. S4305700	€24.95	In stock	View & order
Atag gasket air supply Ø80 mm	8135153 Mfr. no. S4323510	€32.95	In stock	View & order
Atag O-ring 13.94 x 2.62 mm air vent/plate heat exchanger for OSS1/2/3/4	8131325 Mfr. no. S4342300	€23.95	In stock	View & order
Atag O-ring set 4.8 x 1.8 mm heat exchanger connection	8137056 Mfr. no. S4322320	€22.95	In stock	View & order
Atag O-ring 14.30 x 2.40 mm gas pipe A 3 pcs	8139187 Mfr. no. S4749500	€34.95	In stock	View & order
Atag seal 5,5 EPDM	8135255 Mfr. no. S4397000	€47.95	Made-to-order item	View & order
Atag O-ring three-way valve	8131814 Mfr. no. S4158300	€30.95	Made-to-order item	View & order
Atag O-ring R 22,5 x 2 mm	8131369 Mfr. no. S4312100	€30.95	Made-to-order item	View & order
Atag seal ionisation/ignition OSS all	8138100 Mfr. no. S4709800	€45.95	In stock	View & order

Pipes, tubes and hoses for the Atag Q25SR | from 2020 OSS1 (7) all Atag pipes, tubes and hoses →

Part	Item no. / mfr. no.	Price	Stock
Atag exhaust pipe 63° assembled SHR15/24	8135460 Mfr. no. S4499400	€70.95	In stock	View & order
Atag swivel nut for filter M35	8136445 Mfr. no. S4259500	€33.95	In stock	View & order
Atag safety relief pipe for OSS1/2/3/4	8137040 Mfr. no. S4467300	€43.95	In stock	View & order
Atag gas reducer S4307100 -	8139610 Mfr. no. S4307100	€31.95	Made-to-order item	View & order
Atag flow pipe	8136625 Mfr. no. S4318510	€121.95	Made-to-order item	View & order
Atag CH pipe grommet	8139517 Mfr. no. S4310610	€31.95	Made-to-order item	View & order
Atag return pipe pump/installation solo 15-35/38	8139036 Mfr. no. S4317800	€137.95	Made-to-order item	View & order

Casing and panels for the Atag Q25SR | from 2020 OSS1 (3) all Atag casing and panels →

Part	Item no. / mfr. no.	Price	Stock
Atag door Q complete	8138114 Mfr. no. S4731400	€87.95	In stock	View & order
Atag cover air supply 80mm SHR	8139210 Mfr. no. S4323310	€29.95	Made-to-order item	View & order
Atag cover air supply 120/80mm	8138013 Mfr. no. S4323410	€44.95	Made-to-order item	View & order

Insulation for the Atag Q25SR | from 2020 OSS1 (1)

Part	Item no. / mfr. no.	Price	Stock
Atag insulation set tube plate left and right Q/E for OSS1/2/3/4	8138109 Mfr. no. S4730900	€33.95	In stock	View & order

Fixing material for the Atag Q25SR | from 2020 OSS1 (10) all Atag fixing material →

Part	Item no. / mfr. no.	Price	Stock
Atag closure control tower	8135330 Mfr. no. S4323200	€24.95	In stock	View & order
Atag closure front control tower	8135340 Mfr. no. S4323100	€21.95	In stock	View & order
Atag air box closure per piece	8135350 Mfr. no. S4322500	€22.95	In stock	View & order
Atag sealing cap exhaust pipe Ø13mm for flue gas measurement	8136420 Mfr. no. S4521600	€22.95	In stock	View & order
Atag bolt M 5x16 CK-PZ (5 pcs)	8139974 Mfr. no. S4286000	€29.95	Made-to-order item	View & order
Atag cap air vent SHR 3 pcs for OSS1/2/3/4	8139162 Mfr. no. S4380600	€41.95	Made-to-order item	View & order
Atag service nipple	8138125 Mfr. no. S4317200	€29.95	Made-to-order item	View & order
Atag screw taptite M5 x 8 mm ck-pd (3 x )	8139214 Mfr. no. S4167500	€21.95	In stock	View & order
Atag bolt M6 x 20 mm stainless steel hex socket bp 4,2 3 pcs	8139513 Mfr. no. S4307220	€29.95	Made-to-order item	View & order
Atag bolt M5 x 12 mm gr phase hexagon din7985 (5 x )	8139213 Mfr. no. S4418710	€25.95	In stock	View & order

Other parts for the Atag Q25SR | from 2020 OSS1 (19)

Part	Item no. / mfr. no.	Price	Stock
Atag lower tray assembled 25kW	8138106 Mfr. no. S4730600	€108.45	In stock	View & order
Atag filter cap	8136440 Mfr. no. S4317610	€43.95	In stock	View & order
Atag clamping rod condensate tray for OSS1/2/3/4	8139052 Mfr. no. S4310700	€31.95	In stock	View & order
Atag burner toggle rod for OSS1/2/3/4	8139057 Mfr. no. S4310800	€32.95	In stock	View & order
Atag pipe nipple 1/2"x15 mm coupling gas pipe	8136392 Mfr. no. S4493300	€45.95	In stock	View & order
Atag water trap pressure sensor	8137098 Mfr. no. S4325900	€34.95	In stock	View & order
Atag air box SHR15-24-35	8139070 Mfr. no. S4315800	€167.95	In stock	View & order
Atag control tower rear	8136060 Mfr. no. S4322700	€76.95	In stock	View & order
Atag clamping ring outlet stub 80gr S4905800	8135612 Mfr. no. S4905800	€48.95	Made-to-order item	View & order
Atag main switch 230v S4931100	8135613 Mfr. no. S4931100	€48.95	Made-to-order item	View & order
Atag control tower front S4951300	8135634 Mfr. no. S4951300	€90.95	Made-to-order item	View & order
Atag connection lead with plug S4967900	8135635 Mfr. no. S4967900	€92.95	Made-to-order item	View & order
Atag O-ring 13.94x2.62mm blue 3 pcs	8130065 Mfr. no. S4328720	€41.95	Made-to-order item	View & order
Atag upper tray assy OSS1 for OSS1/2/3/4	8139212 Mfr. no. S4735000	€115.95	Made-to-order item	View & order
Atag condensate drain pipe	8130886 Mfr. no. S4316500	€32.95	In stock	View & order
Atag condensate plug 1/4" for OSS1/2/3/4	8139712 Mfr. no. S4674500	€30.95	Made-to-order item	View & order
Atag air box rear	8139079 Mfr. no. S4316100	€119.95	Made-to-order item	View & order
Atag hose clamp stainless steel 20-32mm for OSS1/2/3/4	8139224 Mfr. no. S4395600	€31.95	Made-to-order item	View & order
Atag flue gas seal Ø80 mm XL	8139636 Mfr. no. S4816700	€36.95	In stock	View & order

Exploded views of the Atag Q25SR | from 2020 OSS1

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

Fault code on your Atag Q25SR | from 2020 OSS1? This is the part type involved

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

Code	What is going on	Part type
40	Temperature exceeded at the burner flow temperature sensor.	Burners
78	Water pressure sensor out of range or not connected or, if water pressure is OK: pump defective.	Pumps
104	No pump kick	Pumps
129	Fan fault (fan does not start)	Fans
151	Fan fault (speed control not reached or out of range) or defective control unit.	Fans
501	Ionisation fault	Ignition and ionisation

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 Atag Q25SR | from 2020 OSS1?

The catalogue lists 98 original parts for the Atag Q25SR | from 2020 OSS1, including fans, temperature sensors and NTC sensors, pressure sensors, pumps. All parts are listed above, grouped by type, with part number and price.

How much does a fan for the Atag Q25SR | from 2020 OSS1 cost?

The fans for this model cost €410.34 incl. VAT. Check the table "Fans" above for the right part number.

Are the parts for the Atag Q25SR | from 2020 OSS1 in stock?

55 of the 98 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 Atag Q25SR | from 2020 OSS1?

Search for the part by part number or use the exploded view of the Atag Q25SR | from 2020 OSS1.

Are these original Atag parts?

Yes. All 98 parts in this list are original manufacturer parts for the Atag Q25SR | from 2020 OSS1, supplied through the official technical wholesale channel and with the correct part number.

How much do parts for the Atag Q25SR | from 2020 OSS1 cost?

Parts for the Atag Q25SR | from 2020 OSS1 range from €18.95 to €733.11 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.