Atag A-series spare parts
Original parts for the Atag A-series series: 7 models, 118 different parts, 80 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.
In brief
Instalpunt supplies 118 original parts for the Atag A-series (A203C | from 2008 OSS1, A203EC | from 10-2016 OSS2, A244CL | from 11-2009 OSS1, A244C | from 2008 up to 11-2009 OSS2 and 3 andere models), with Atag manufacturer part number and price van €15.55 to €2,891.15. 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).
- 3 November 2026Price level
Other Atag series: Atag i-series (iCon)Atag Q-seriesAtag E-seriesAtag P-series (iCon)Atag Blauwe EngelAtag XL-series
Choose your Atag A-series model
- Atag A203C | from 2008 OSS197 parts · exploded view
- Atag A203EC | from 10-2016 OSS297 parts · exploded view
- Atag A244CL | from 11-2009 OSS195 parts · exploded view
- Atag A244C | from 2008 up to 11-2009 OSS298 parts · exploded view
- Atag A244EC | from 2008 OSS298 parts · exploded view
- Atag A285C | from 2017 OSS292 parts · exploded view
- Atag A285EC | from 2017 OSS290 parts · exploded view
Quick left to the right part
| Part | From | Delivery |
|---|---|---|
| Fan Atag fan 230V | €318.19 | 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). |
| Ignition part Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009 | €108.63 | 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 Atag water pressure sensor Huba | €119.03 | 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 Atag flow sensor | €62.35 | 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). |
| Temperature sensor Atag NTC return 10K | €40.51 | 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 Atag pump UPMO 15-60 130 9U 230V | €393.07 | 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 Atag plate heat exchanger OSS1 | €138.27 | 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 Atag control unit LMU84 DWK after 10/-2012 | €452.35 | 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, straight from the checkout. Choose your exact model below for the complete list.
Most frequently replaced parts
- Fans 2
- Temperature sensors and NTC sensors 3
- Pressure sensors 1
- Flow sensors and flow switches 1
- Pumps 1
- Heat exchangers 2
- Gas valves and gas control 3
- Burner control units 2
- Ignition and ionisation 1
- Siphons and condensate drains 1
- Burners 2
- Maintenance and service kits 3
- Valves 5
- Electrical parts 3
- Tap parts 1
- Cables and wiring harnesses 8
- Gasket sets 1
- Gaskets and seals 32
- Pipes, tubes and hoses 9
- Casing and panels 4
- Insulation 1
- Fixing material 11
- Other parts 21
Fans for the Atag A-series (2)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag fan 230V fits 7 models | 8139182 Mfr. no. S4742800 | €318.19 | In stock | View |
| Rewind refurbished fan for Atag A/E series (S4742800) fits 7 models | 8930071 | €277.63 | Made-to-order item | View |
Temperature sensors and NTC sensors for the Atag A-series (3)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag NTC domestic hot water fits 7 models | 8139185 Mfr. no. S4746100 | €52.99 | In stock | View |
| Atag NTC return 10K fits 7 models | 8139178 Mfr. no. S4746000 | €40.51 | In stock | View |
| Atag NTC flow 10K fits 7 models | 8139180 Mfr. no. S4745900 | €52.99 | In stock | View |
Pressure sensors for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag water pressure sensor Huba fits 7 models | 8135490 Mfr. no. S4466300 | €119.03 | In stock | View |
Flow sensors and flow switches for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag flow sensor fits 7 models | 8139168 Mfr. no. S4746800 | €62.35 | In stock | View |
Pumps for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag pump UPMO 15-60 130 9U 230V fits 7 models | 8130007 Mfr. no. S5033900 | €393.07 | In stock | View |
Heat exchangers for the Atag A-series (2)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag plate heat exchanger OSS2 + sealing rings fits 6 models | 8139203 Mfr. no. S4744900 | €184.03 | In stock | View |
| Atag plate heat exchanger OSS1 | 8139202 Mfr. no. S4746400 | €138.27 | In stock | View |
Gas valves and gas control for the Atag A-series (3)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag gas control block fits 7 models | 8139183 Mfr. no. S4751900 | €217.31 | In stock | View |
| Atag venturi SHR24 for OSS1 fits 2 models | 8139089 Mfr. no. S4318810 | €107.07 | In stock | View |
| Atag venturi SHR 35 for OSS2 fits 5 models | 8136305 Mfr. no. S4318920 | €122.67 | Made-to-order item | View |
Burner control units for the Atag A-series (2)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag control unit LMU84 DWK after 10/-2012 fits 7 models | 8139625 Mfr. no. S4834900 | €452.35 | In stock | View |
| Atag control unit LMU-B A-SER up to 12-2012 fits 7 models | 8139240 Mfr. no. S4754600 | €472.11 | In stock | View |
Ignition and ionisation for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag ignition electrode incl. seal Q and SHR after new heat exchanger 2013 from 2009 fits 7 models | 8138101 Mfr. no. S4710100 | €108.63 | In stock | View |
Siphons and condensate drains for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag siphon SHR fits 7 models | 8139064 Mfr. no. S4421200 | €56.11 | In stock | View |
Burners for the Atag A-series (2)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag burner bed assy. OSS2 fits 5 models | 8138103 Mfr. no. S4714700 | €173.63 | In stock | View |
| Atag burner cassette assy. 25kW for OSS1 fits 2 models | 8138102 Mfr. no. S4714600 | €130.99 | In stock | View |
Maintenance and service kits for the Atag A-series (3)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag maintenance set for OSS1 fits 2 models | 8139218 Mfr. no. S4784700 | €73.79 | In stock | View |
| Atag maintenance set for OSS2 fits 2 models | 8139216 Mfr. no. S4784800 | €80.03 | In stock | View |
| Atag maintenance set OSS2 with ignition electrode | 8139603 Mfr. no. S4785600 | €167.39 | In stock | View |
Valves for the Atag A-series (5)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag automatic air vent chrome SHR for OSS1/2/3/4 fits 7 models | 8135041 Mfr. no. S4419110 | €67.55 | In stock | View |
| Atag mixing valve SHR fits 7 models | 8131121 Mfr. no. S4312500 | €95.63 | In stock | View |
| Atag non-return valve upper tray CLV system fits 7 models | 0650036 Mfr. no. AA000100 | €84.19 | In stock | View |
| Atag dosing valve DHW 7,6 l/min fits 4 models | 8139191 Mfr. no. S4755300 | €91.47 | Made-to-order item | View |
| Atag dosing valve DHW 6,0 l/min | 8139190 Mfr. no. S4755200 | €91.47 | Made-to-order item | View |
Electrical parts for the Atag A-series (3)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag fuse glass T3.15 250V 3 pcs fits 7 models | 8139166 Mfr. no. S4749200 | €35.31 | In stock | View |
| Atag ignition transformer fits 7 models | 8139184 Mfr. no. S4744100 | €68.59 | Made-to-order item | View |
| Atag power supply + wiring PCB interface fits 3 models | 8139626 Mfr. no. S4753500 | €257.87 | Made-to-order item | View |
Tap parts for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag cartridge 3-way valve E series after 10/2012 VC4013 fits 7 models | 8139619 Mfr. no. S4828700 | €53.51 | In stock | View |
Cables and wiring harnesses for the Atag A-series (8)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag spark plug cable set fits 7 models | 8139177 Mfr. no. S4754400 | €52.99 | In stock | View |
| Atag wiring harness 24V low voltage combi fits 7 models | 8139173 Mfr. no. S4744800 | €50.91 | In stock | View |
| Atag connector external safety control fits 7 models | 8139176 Mfr. no. S4745200 | €33.23 | In stock | View |
| Atag connector room thermostat fits 7 models | 8139175 Mfr. no. S4745100 | €25.95 | In stock | View |
| Atag wiring harness 24V low voltage basic fits 7 models | 8139172 Mfr. no. S4744700 | €92.51 | Made-to-order item | View |
| Atag connector outdoor sensor A fits 7 models | 8139588 Mfr. no. S4745400 | €31.15 | Made-to-order item | View |
| Atag wiring harness 230V fits 7 models | 8139171 Mfr. no. S4744600 | €67.55 | Made-to-order item | View |
| Atag connector opentherm fits 5 models | 8139757 Mfr. no. S4745000 | €31.15 | Made-to-order item | View |
Gasket sets for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag seal set pipes fits 7 models | 8139209 Mfr. no. S4755100 | €63.39 | Made-to-order item | View |
Gaskets and seals for the Atag A-series (32)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag sealing ring gas valve/venturi for OSS1/2/3/4 fits 7 models | 8139033 Mfr. no. S4337610 | €25.95 | In stock | View |
| Atag sealing ring venturi/fan for OSS1/2/3/4 fits 7 models | 8139034 Mfr. no. S4325610 | €25.95 | In stock | View |
| Atag lip ring outlet stub fits 7 models | 8139019 Mfr. no. S4472600 | €25.95 | In stock | View |
| Atag O-ring 2 pcs fits 7 models | 8131119 Mfr. no. S4312300 | €28.03 | In stock | View |
| Atag O-ring set 2 pcs 21.89 x 2.62 mm plate heat exchanger fits 7 models | 8131315 Mfr. no. S4360500 | €24.91 | In stock | View |
| Atag gasket fits 7 models | 8135156 Mfr. no. S4323710 | €24.91 | In stock | View |
| Atag sealing ring intake fan SHR for OSS1/2/3/4 fits 7 models | 8135246 Mfr. no. S4309500 | €23.87 | In stock | View |
| Atag gasket fan mouth SHR for OSS1/2/3/4 fits 7 models | 8135270 Mfr. no. S4305700 | €25.95 | In stock | View |
24 more gaskets and seals for the Atag A-series: choose your exact model above for the complete list, or view all Atag gaskets and seals.
Pipes, tubes and hoses for the Atag A-series (9)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag pipe Ø22 mm flow/return fits 7 models | 8139194 Mfr. no. S4743200 | €59.23 | In stock | View |
| Atag exhaust pipe 63° assembled SHR15/24 fits 2 models | 8135460 Mfr. no. S4499400 | €73.79 | In stock | View |
| Atag flue gas adapter fits 2 models | 8139023 Mfr. no. S4500500 | €63.39 | In stock | View |
| Atag pipe 15 cold/hot fits 7 models | 8139189 Mfr. no. S4743300 | €63.39 | Made-to-order item | View |
| Atag pipe hydroblock/pump fits 7 models | 8139207 Mfr. no. S4743100 | €70.67 | Made-to-order item | View |
| Atag gas pipe A244 fits 5 models | 8139586 Mfr. no. S4741300 | €97.71 | Made-to-order item | View |
| Atag flow pipe OSS2 fits 5 models | 8139205 Mfr. no. S4743000 | €116.43 | Made-to-order item | View |
| Atag gas pipe A203 fits 2 models | 8139587 Mfr. no. S4741400 | €95.63 | Made-to-order item | View |
1 more pipes, tubes and hoses for the Atag A-series: choose your exact model above for the complete list, or view all Atag pipes, tubes and hoses.
Casing and panels for the Atag A-series (4)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag cover air supply 80mm SHR fits 7 models | 8139210 Mfr. no. S4323310 | €31.15 | Made-to-order item | View |
| Atag cover air supply 120/80mm fits 7 models | 8138013 Mfr. no. S4323410 | €46.75 | Made-to-order item | View |
| Atag casing door A series fits 7 models | 8139591 Mfr. no. S4753300 | €99.79 | Made-to-order item | View |
| Atag casing A series assembled fits 7 models | 8139592 Mfr. no. S4759000 | €224.59 | Made-to-order item | View |
Insulation for the Atag A-series (1)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag insulation set tube plate left and right Q/E for OSS1/2/3/4 fits 7 models | 8138109 Mfr. no. S4730900 | €35.31 | In stock | View |
Fixing material for the Atag A-series (11)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag sealing cap exhaust pipe Ø13mm for flue gas measurement fits 7 models | 8136420 Mfr. no. S4521600 | €23.87 | In stock | View |
| Atag locking ring small fits 7 models | 8139997 Mfr. no. S4415220 | €36.35 | In stock | View |
| Atag Enigma closure large fits 7 models | 8139160 Mfr. no. S4415120 | €26.99 | In stock | View |
| Atag screw M5 x 12 mm hex socket countersunk (3 pcs) for OSS1/2/3/4 fits 7 models | 8139217 Mfr. no. S4440000 | €23.87 | In stock | View |
| Atag plug instead of safety relief valve 1/2" fits 7 models | 8139215 Mfr. no. S4753100 | €49.87 | In stock | View |
| Atag screw taptite M5 x 8 mm ck-pd (3 x ) fits 7 models | 8139214 Mfr. no. S4167500 | €22.83 | In stock | View |
| Atag bolt M5 x 12 mm gr phase hexagon din7985 (5 x ) fits 7 models | 8139213 Mfr. no. S4418710 | €26.99 | In stock | View |
| Atag locking spring gas pipe A series fits 7 models | 8139222 Mfr. no. S4751800 | €45.71 | Made-to-order item | View |
3 more fixing material for the Atag A-series: choose your exact model above for the complete list, or view all Atag fixing material.
Other parts for the Atag A-series (21)
| Part | Item no. / mfr. no. | Price | Stock | |
|---|---|---|---|---|
| Atag three-way valve stepper up to 10/2012 (FJ2030ZAK4001U) fits 7 models | 8139167 Mfr. no. S4746900 | €136.19 | In stock | View |
| Atag 3-way valve motor clip after 10/2012 Combi fits 7 models | 8139621 Mfr. no. S4828600 | €142.95 | In stock | View |
| Atag clamping rod condensate tray for OSS1/2/3/4 fits 7 models | 8139052 Mfr. no. S4310700 | €33.23 | In stock | View |
| Atag burner toggle rod for OSS1/2/3/4 fits 7 models | 8139057 Mfr. no. S4310800 | €34.27 | In stock | View |
| Atag pipe nipple 1/2"x15 mm coupling gas pipe fits 7 models | 8136392 Mfr. no. S4493300 | €47.79 | In stock | View |
| Atag condensate collector PF/ESHR fits 7 models | 8136277 Mfr. no. S4421300 | €46.75 | In stock | View |
| Atag water trap pressure sensor fits 7 models | 8137098 Mfr. no. S4325900 | €36.35 | In stock | View |
| Atag connection lead 230V for e.g. A244C S4746600 fits 7 models | 8139174 Mfr. no. S4746600 | €44.67 | In stock | View |
13 more other parts for the Atag A-series: choose your exact model above for the complete list.
Fault code on your Atag A-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.
Frequently asked questions
Which parts are replaced most often on an Atag A-series?
In the parts lists of the 7 Atag A-series models, fans, temperature sensors and ntc-sensors, pressure 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 A-series cost?
At Instalpunt a new, original fan for the Atag A-series costs from €318.19 incl. VAT (Atag fan 230V, in stock). 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 A-series cost?
At Instalpunt a new, original ignition part for the Atag A-series costs from €108.63 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 A-series cost?
At Instalpunt a new, original pressure sensor for the Atag A-series costs from €119.03 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 A-series model I have?
Check the rating plate on the underside or inside of the casing: it shows the exact type (for example Atag A203C | from 2008 OSS1) 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.