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Atag Q-series spare parts

Original parts for the Atag Q-series series: 21 models, 226 different parts, 111 of them in stock. Below you will find the most frequently replaced parts by type first; choose your exact model for the complete list with exploded view.

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In brief

Instalpunt supplies 226 original parts for the Atag Q-series (Q25CR | from 2020 OSS2, Q25C | from 2005 OSS2, Q25SC 200N OSS1, Q25SC 380N OSS1 and 17 andere models), with Atag manufacturer part number and price van €16.15 to €1,623.19. 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).

  • 4 November 2026Price level

Other Atag series: Atag A-seriesAtag i-series (iCon)Atag E-seriesAtag P-series (iCon)Atag Blauwe EngelAtag XL-series

Choose your Atag Q-series model

Quick left to the right part

PartFromDelivery
Fan
Atag fan assembled 24V DC SHR15/24/35
€217.03In-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).
Ignition part
Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009
€112.81In-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
Atag water pressure sensor Huba
€123.61In-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).
Temperature sensor
Atag NTC return 10K
€42.07In-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
Atag pump UPMO 20-60 130 9u 230V MOD
€362.83In-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
Atag burner control unit 1418 for ZGCHR
€574.51In-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).
Display
Atag display PCB MCBA 1415 Q series
€151.15In-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, straight from the checkout. Choose your exact model below for the complete list.

Most frequently replaced parts

Fans for the Atag Q-series (6)

PartItem no. / mfr. no.PriceStock
Atag fan assembled 230V AC fits 9 models8135470
Mfr. no. S4310520
€448.69In stockView
Rewind refurbished fan for Atag 230V AC (S4310520) fits 9 models8930069€303.43In stockView
Rewind refurbished fan for Atag 24V DC (S44427200) fits 8 models8930070€238.63In stockView
Atag fan assembled 24V DC SHR15/24/35 fits 8 models8135480
Mfr. no. S4442720
€217.03In stockView
Atag fan 230V fits 4 models8139182
Mfr. no. S4742800
€330.43In stockView
Rewind refurbished fan for Atag A/E series (S4742800) fits 4 models8930071€288.31Made-to-order itemView

Sensors for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag sensor hot water cylinder/return T2-3-8-9 fits 13 models8135300
Mfr. no. S4309700
€30.19In stockView
Atag flow sensor/DHW T1 12k ohm fits 13 models8135000
Mfr. no. S4307420
€48.01In stockView
Atag flue gas sensor fits 13 models8135310
Mfr. no. S4339510
€67.99Made-to-order itemView

Temperature sensors and NTC sensors for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag NTC return 10K fits 8 models8139178
Mfr. no. S4746000
€42.07In stockView
Atag NTC flow 10K fits 8 models8139180
Mfr. no. S4745900
€55.03In stockView
Atag NTC hot water cylinder (external) SHR/Q series8136372
Mfr. no. S4358610
€70.15Made-to-order itemView

Pressure sensors for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag water pressure sensor Huba fits 21 models8135490
Mfr. no. S4466300
€123.61In stockView

Pumps for the Atag Q-series (5)

PartItem no. / mfr. no.PriceStock
Atag pump UPMO 20-60 130 9u 230V MOD fits 4 models8135296
Mfr. no. S5033700
€362.83In stockView
Atag pump upm3 15-75 130 9u 230V solar fits 4 models8132219
Mfr. no. S4877600
€531.31In stockView
Atag pump upm 20-70 q fits 8 models8139840
Mfr. no. S4746300
€632.83Made-to-order itemView
Atag pump motor UPMO 20-70 130 9U 230V fits 8 models8135291
Mfr. no. S5033800
€407.11Made-to-order itemView
Atag pump 15/40 domestic hot water8139584
Mfr. no. S4738700
€376.87Made-to-order itemView

Heat exchangers for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag plate heat exchanger Q30CC8130014
Mfr. no. S4731900
€331.51Made-to-order itemView

Gas valves and gas control for the Atag Q-series (7)

PartItem no. / mfr. no.PriceStock
Atag gas control block type VK8115V fits 13 models8135130
Mfr. no. S4304700
€209.47In stockView
Atag gas control block fits 8 models8139183
Mfr. no. S4751900
€225.67In stockView
Atag venturi SHR24 for OSS1 fits 3 models8139089
Mfr. no. S4318810
€111.19In stockView
Atag venturi SHR 35 for OSS2 fits 9 models8136305
Mfr. no. S4318920
€127.39Made-to-order itemView
Atag venturi SHR51/60 fits 9 models8139123
Mfr. no. S4319020
€131.71Made-to-order itemView
Atag gas pipe cpl. oss2-4 S4722300 fits 7 models8135639
Mfr. no. S4722300
€103.63Made-to-order itemView
Atag gas pipe cpl. qss1 S47222008135638
Mfr. no. S4722200
€103.63Made-to-order itemView

PCBs and controls for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag solar module 1418 AM6 fits 4 models8139134
Mfr. no. S4527800
€341.23Made-to-order itemView

Burner control units for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag control unit 5415 Q series fits 9 models8137099
Mfr. no. S4711200
€692.77In stockView
Atag burner control unit 1418 for ZGCHR fits 4 models8135275
Mfr. no. S4528000
€574.51In stockView
Atag burner control unit LMS14 Mini + stick S4999510 fits 2 models8130018
Mfr. no. S4999510
€574.51In stockView

Ignition and ionisation for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009 fits 21 models8138101
Mfr. no. S4710100
€112.81In stockView
Atag ignition transformer fits 8 models8138546
Mfr. no. S4851000
€70.15Made-to-order itemView
Atag ignition cable set fits 8 models8138559
Mfr. no. S4863800
€69.07Made-to-order itemView

Expansion vessels for the Atag Q-series (2)

PartItem no. / mfr. no.PriceStock
Atag expansion vessel 12 litre for e.g. Blauwe Engel HR 39 S10959008139004
Mfr. no. S1095900
€148.99In stockView
Atag expansion vessel 18 litre 2,5bar fits 4 models8139570
Mfr. no. S4528200
€312.07Made-to-order itemView

Siphons and condensate drains for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag siphon complete SHR fits 21 models8136240
Mfr. no. S4451610
€77.71In stockView

Burners for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag burner bed assy. OSS2 fits 9 models8138103
Mfr. no. S4714700
€180.31In stockView
Atag burner bed OSS3/4 natural gas fits 9 models8138129
Mfr. no. S4825600
€400.63In stockView
Atag burner cassette assy. 25kW for OSS1 fits 3 models8138102
Mfr. no. S4714600
€136.03In stockView

Displays and controls for the Atag Q-series (2)

PartItem no. / mfr. no.PriceStock
Atag display PCB MCBA 1415 Q series fits 13 models8139128
Mfr. no. S4713600
€151.15In stockView
Atag rotary knob AVS37 S4967500 fits 8 models8135611
Mfr. no. S4967500
€51.79Made-to-order itemView

Filters for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag water filter fits 21 models8136265
Mfr. no. S4317500
€52.87Made-to-order itemView

Maintenance and service kits for the Atag Q-series (6)

PartItem no. / mfr. no.PriceStock
Atag maintenance set for OSS3/4 fits 4 models8139225
Mfr. no. S4784900
€99.31In stockView
Atag maintenance set for OSS2 fits 3 models8139216
Mfr. no. S4784800
€83.11In stockView
Atag maintenance set OSS2 with ignition electrode fits 3 models8139603
Mfr. no. S4785600
€173.83In stockView
Atag maintenance set OSS3/4 with ignition electrode fits 3 models8139604
Mfr. no. S4785700
€185.71In stockView
Atag maintenance set for OSS18139218
Mfr. no. S4784700
€76.63In stockView
Atag overhaul set insulation tube plate without adhesive fits 7 models8139066
Mfr. no. S5071600
€196.51Made-to-order itemView

Valves for the Atag Q-series (16)

PartItem no. / mfr. no.PriceStock
Atag safety relief valve Duco 3 bar fits 21 models8135200
Mfr. no. S4344630
€45.85In stockView
Atag automatic air vent chrome SHR for OSS1/2/3/4 fits 21 models8135041
Mfr. no. S4419110
€70.15In stockView
Atag mixing valve SHR fits 11 models8131121
Mfr. no. S4312500
€99.31In stockView
Atag safety relief pipe for inlet combination fits 9 models8131366
Mfr. no. S4338700
€39.91In stockView
Atag inlet combination including safety relief pipe fits 9 models8136400
Mfr. no. S4302220
€112.27In stockView
Atag inlet combination 8 bar fits 2 models8130104
Mfr. no. S4333510
€90.67In stockView
Atag fill and drain valve 1/2" fits 12 models8132060
Mfr. no. S1002200
€59.35Made-to-order itemView
Atag union nut 15 compression fits 9 models8139870
Mfr. no. S1035700
€31.27Made-to-order itemView

8 more valves for the Atag Q-series: choose your exact model above for the complete list, or view all Atag valves.

Motors for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag Energion motor three-way valve fits 5 models8138504
Mfr. no. S4009500
€170.59In stockView

Electrical parts for the Atag Q-series (3)

PartItem no. / mfr. no.PriceStock
Atag transformer for MCBA 1415D fits 13 models8135421
Mfr. no. S4324900
€124.15In stockView
Atag fuse 6,3 at h 250v (3 x ) fits 8 models8139872
Mfr. no. S4823100
€31.27Made-to-order itemView
Atag switch SHR/solar gas combi 230V fits 4 models8139154
Mfr. no. S4348400
€48.55Made-to-order itemView

Tap parts for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag cartridge for three-way valve fits 14 models8130385
Mfr. no. S4268400
€110.11In stockView

Cables and wiring harnesses for the Atag Q-series (15)

PartItem no. / mfr. no.PriceStock
Atag spark plug cable fits 18 models8135070
Mfr. no. S4323800
€57.19In stockView
Atag earth cable ignition fits 18 models8139223
Mfr. no. S4723200
€26.95In stockView
Atag ionisation cable for e.g. Q38C S4323900 fits 18 models8135160
Mfr. no. S4323900
€60.43Made-to-order itemView
Atag wiring harness BE 2 SHR fits 13 models8135265
Mfr. no. S4398510
€210.55Made-to-order itemView
Atag plug 2-pole black fits 8 models8135380
Mfr. no. S4320500
€31.27Made-to-order itemView
Atag connecting cable AVS37-LMS S4869700 fits 8 models8135619
Mfr. no. S4869700
€56.11Made-to-order itemView
Atag wiring harness cpl. conn. bl. qr S4967600 fits 8 models8135675
Mfr. no. S4967600
€258.07Made-to-order itemView
Atag plug 3-pole grey fits 8 models8139103
Mfr. no. S4380900
€34.51Made-to-order itemView

7 more cables and wiring harnesses for the Atag Q-series: choose your exact model above for the complete list, or view all Atag cables and wiring harnesses.

Gaskets and seals for the Atag Q-series (37)

PartItem no. / mfr. no.PriceStock
Atag O-ring condensate tray/siphon fits 21 models8131368
Mfr. no. S4316400
€25.87In stockView
Atag sealing ring gas valve/venturi for OSS1/2/3/4 fits 21 models8139033
Mfr. no. S4337610
€26.95In stockView
Atag sealing ring venturi/fan for OSS1/2/3/4 fits 21 models8139034
Mfr. no. S4325610
€26.95In stockView
Atag lip ring outlet stub fits 21 models8139019
Mfr. no. S4472600
€26.95In stockView
Atag O-ring 2 pcs fits 21 models8131119
Mfr. no. S4312300
€29.11In stockView
Atag pump gasket 3/4" DN20 R38x25x2 mm 2 pcs fits 21 models8130150
Mfr. no. S1003810
€23.71In stockView
Atag gasket condensate/air box fits 21 models8130125
Mfr. no. S4339110
€36.67In stockView
Atag sealing ring intake fan SHR for OSS1/2/3/4 fits 21 models8135246
Mfr. no. S4309500
€24.79In stockView

29 more gaskets and seals for the Atag Q-series: choose your exact model above for the complete list, or view all Atag gaskets and seals.

Pipes, tubes and hoses for the Atag Q-series (30)

PartItem no. / mfr. no.PriceStock
Atag swivel nut for filter M35 fits 21 models8136445
Mfr. no. S4259500
€36.67In stockView
Atag safety relief pipe for OSS1/2/3/4 fits 21 models8137040
Mfr. no. S4467300
€47.47In stockView
Atag coupling set hot water cylinder fits 13 models8137096
Mfr. no. S4272100
€56.11In stockView
Atag gas pipe fits 11 models8131305
Mfr. no. S4340510
€58.27In stockView
Atag flue gas adapter fits 9 models8139023
Mfr. no. S4500500
€65.83In stockView
Atag exhaust pipe 63° assembled SHR15/24 fits 4 models8135460
Mfr. no. S4499400
€76.63In stockView
Atag concentric connector 80/125 mm fits 4 models0650048
Mfr. no. AA1CA05U
€89.59In stockView
Atag CH pipe grommet fits 21 models8139517
Mfr. no. S4310610
€34.51Made-to-order itemView

22 more pipes, tubes and hoses for the Atag Q-series: choose your exact model above for the complete list, or view all Atag pipes, tubes and hoses.

Casing and panels for the Atag Q-series (14)

PartItem no. / mfr. no.PriceStock
Atag door Q complete fits 20 models8138114
Mfr. no. S4731400
€94.99In stockView
Atag cover Control Tower fits 13 models8135355
Mfr. no. S4322600
€75.55In stockView
Atag cover control tower bottom S-HR fits 13 models8130031
Mfr. no. S4323000
€35.59In stockView
Atag hood control tower middle SHR fits 13 models8130032
Mfr. no. S4322900
€28.03In stockView
Atag hood control tower top closed S-HR fits 9 models8130033
Mfr. no. S4322800
€34.51In stockView
Atag housing control power fits 8 models8139611
Mfr. no. S4779400
€229.99In stockView
Atag top section VC 2010-10 fits 6 models8135170
Mfr. no. S4334910
€153.85In stockView
Atag top section VC 6940-10 fits 3 models8135180
Mfr. no. S4335010
€266.17In stockView

6 more casing and panels for the Atag Q-series: choose your exact model above for the complete list, or view all Atag casing and panels.

Insulation for the Atag Q-series (1)

PartItem no. / mfr. no.PriceStock
Atag insulation set tube plate left and right Q/E for OSS1/2/3/4 fits 21 models8138109
Mfr. no. S4730900
€36.67In stockView

Fixing material for the Atag Q-series (17)

PartItem no. / mfr. no.PriceStock
Atag closure control tower fits 21 models8135330
Mfr. no. S4323200
€26.95In stockView
Atag closure front control tower fits 21 models8135340
Mfr. no. S4323100
€23.71In stockView
Atag air box closure per piece fits 21 models8135350
Mfr. no. S4322500
€24.79In stockView
Atag screw taptite M5 x 8 mm ck-pd (3 x ) fits 21 models8139214
Mfr. no. S4167500
€23.71In stockView
Atag bolt M5 x 12 mm gr phase hexagon din7985 (5 x ) fits 21 models8139213
Mfr. no. S4418710
€28.03In stockView
Atag sealing cap exhaust pipe Ø13mm for flue gas measurement fits 17 models8136420
Mfr. no. S4521600
€24.79In stockView
Atag screw M5 x 12 mm hex socket countersunk (3 pcs) for OSS1/2/3/4 fits 13 models8139217
Mfr. no. S4440000
€24.79In stockView
Atag cap air vent SHR 3 pcs for OSS1/2/3/4 fits 21 models8139162
Mfr. no. S4380600
€45.31Made-to-order itemView

9 more fixing material for the Atag Q-series: choose your exact model above for the complete list, or view all Atag fixing material.

Other parts for the Atag Q-series (43)

PartItem no. / mfr. no.PriceStock
Atag filter cap fits 21 models8136440
Mfr. no. S4317610
€47.47In stockView
Atag clamping rod condensate tray for OSS1/2/3/4 fits 21 models8139052
Mfr. no. S4310700
€34.51In stockView
Atag burner toggle rod for OSS1/2/3/4 fits 21 models8139057
Mfr. no. S4310800
€35.59In stockView
Atag control tower rear fits 21 models8136060
Mfr. no. S4322700
€83.11In stockView
Atag condensate drain pipe fits 21 models8130886
Mfr. no. S4316500
€35.59In stockView
Atag water trap pressure sensor fits 16 models8137098
Mfr. no. S4325900
€37.75In stockView
Atag three-way valve body VC8010 (O-R) fits 14 models8135110
Mfr. no. S4308200
€147.91In stockView
Atag pipe nipple 1/2"x15 mm coupling gas pipe fits 12 models8136392
Mfr. no. S4493300
€49.63In stockView

35 more other parts for the Atag Q-series: choose your exact model above for the complete list.

Fault code on your Atag Q-series?

Look up the fault code in our Atag fault code-database: for each code you see the cause and the part that usually needs replacing.

Atag Q-series 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.

Frequently asked questions

Which parts are replaced most often on an Atag Q-series?

In the parts lists of the 21 Atag Q-series models, fans, sensors, temperature sensors and ntc-sensors appear most often. In the event of a fault, the ignition electrode, fan, pump, diverter valve and sensors are the usual suspects; the appliance’s fault code usually points to the part.

How much does a fan for the Atag Q-series cost?

At Instalpunt a new, original fan for the Atag Q-series costs from €217.03 incl. VAT (Atag fan samengesteld 24V 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). The version that fits your appliance is shown in the parts list of your exact model.

How much does an ignition part for the Atag Q-series cost?

At Instalpunt a new, original ignition part for the Atag Q-series costs from €112.81 incl. VAT (Atag ontsteekelectrode incl. afdichting 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). The version that fits your appliance is shown in the parts list of your exact model.

How much does a pressure sensor for the Atag Q-series cost?

At Instalpunt a new, original pressure sensor for the Atag Q-series costs from €123.61 incl. VAT (Atag waterdruk sensor 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). The version that fits your appliance is shown in the parts list of your exact model.

How do I know which Atag Q-series model I have?

Check the rating plate on the underside or inside of the casing: it shows the exact type (for example Atag Q25CR | from 2020 OSS2) and the serial number. Then choose your model above for the complete parts list. Not sure which model you have? Contact the manufacturer.

Are these original Atag parts?

Yes. All parts are genuine manufacturer parts and are listed under the Atag manufacturer part number in the appliance’s parts list. Items in stock are shipped the same working day if ordered before 14:00 (delivery to EU countries usually 3–5 working days); parts to order have the stated lead time.
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