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Atag spare parts

Original parts for all Atag appliances. Choose your model below for the complete parts list (often with an exploded view) and order directly.

In brief

Instalpunt supplies 852 original Atag parts for 174 models, with part number, price and exploded view. Order online.

  • 852Spare parts
  • 174Models
  • €2.04From

Popular Atag series

Looking for a wear part for a common appliance? These pages show, per series, the most frequently replaced parts (fan, pump, electrode, diverter valve, sensors) and all the models in that series.

Atag parts by appliance family

Atag parts by type

Looking for a specific type of part? For each type, all Atag spare parts are listed with price, stock and the models they fit.

Atag hot water cylinders

Atag boilers

Atag heat pumps

Atag Heat exchanger

Original ATAG-parts herkennen and bestellen

Een origineel ATAG-part is the part that ATAG itself supplies for the appliance, with the manufacturer part number of ATAG. For ATAG, that is meestal een S gevolgd door 7 digits (for example S4710100), soms 8 cijfers. Dat nummer staat op het oude part, in de onderdelentekening van je model and op elke productpagina bij Instalpunt (also in de titel), zodat je het één-op-één kunt vergelijken.

Please note: we do not check whether a part fits your appliance. Compare the manufacturer number with the number on your old part or in the exploded view of your model; if in doubt, check with ATAG or your installer.

Atag fault code? This is the part you usually need

Your Atag appliance is showing a fault code? Below you can see, for common codes, which part is usually the cause – ready to order.

Fault codeWhat is going onPart
1TD sensor errorView sensors
2P4Electric element thermostat (man.)View thermostats
2P5Electric element thermostat (auto)View thermostats
9E18Safety thermostat ST1 faultView thermostats
9E31Compressor thermostat protectionView thermostats
10Outdoor sensor fault (e.g. open, short-circuited, out of range)View sensors
20Flow temperature sensor defectiveView sensors
40Temperature exceeded at the burner flow temperature sensor.View burners
78Water pressure sensor out of range or not connected or, if water pressure is OK: pump defective.View pumps
102Pressure sensor defectiveView sensors
104No pump kickView pumps
114Outdoor sensor fault (e.g. open, short-circuited, out of range)View sensors
129Fan fault (fan does not start)View fans
151Fan fault (speed control not reached or out of range) or defective control unit.View fans
303Control unit faultView PCBs
501Ionisation faultView electrodes
612Fan fault (fan does not start)View fans
730Sensor at top of buffer defectiveView sensors
732Sensor at bottom of storage tank defectiveView sensors
909HP no fan speedView fans
913LWT sensor errorView sensors
914TR sensor errorView sensors
918Pump defective errorView pumps
931-4Subcode par. 13.9.1: heat sink sensor failureView sensors
931-8Subcode par. 13.9.1: FC temperature sensor faultView sensors
934DHW tank sensor damagedView sensors
936Floor thermostat 1 errorView thermostats
951High temp TD sensorView sensors
957Wrong HP fan modelView fans
B1Temperature difference between flow and return too large. Insufficient flow or pump defective?View pumps
B6Return temperature higher than flow temperature. Circulation pump fitted the wrong way round?View pumps
BL 11Maximum Delta-T of flow and return sensor on CH repeatedly exceeded. Hot water operation remains possible during the block. During the block the pump keeps running at minimum capacityView pumps
BL 12Maximum Delta-T of flow and return sensor on DHW repeatedly exceeded. CH operation remains possible during the block. During the block the pump keeps running at minimum capacity.View pumps
BL 67A Delta-T was detected between flow and return sensor while the burner is not operating. The block is lifted once the Delta-T has disappearedView burners
BL 81Flue gas sensor interrupted after having been connected to the control. Burner is blocked until the flue gas sensor is reconnectedView burners
BL 85The control has detected no water flow. Automatic venting cycle is started. If water flow is detected during this cycle, the venting cycle ends and the burner is released.View burners
Bx01sc01Fan not running at the correct speedView fans
Bx12sc01Water pressure sensor open.View sensors
Bx12sc02Water pressure sensor short-circuited.View sensors
C 10Outdoor sensor fault (e.g. open, short-circuited, out of range)View sensors

For guidance only: the same code can have a different cause depending on the model. Not sure? Write to us or have the appliance checked by a qualified professional.

Frequently asked questions

Which Atag spare parts does Instalpunt supply?

Instalpunt supplies 852 original parts for 174 Atag models, including O-ring, afdichting, gasket, pipe, cover. Each part is listed in the catalogue with part number, price and stock status.

How do I find the right part for my Atag appliance?

Choose your model above to see the complete parts list (for 170 models with an exploded view). The model type is on the rating plate of the appliance. Already know the part number? Then search by number directly in the spare parts catalogue.

For which Atag models are parts available?

Among others for the Q25SC 200N OSS1, Q38SR | from 2020 OSS2, Q38SC 200N OSS1, Q42CR | from 2020 OSS3, Q51CR | from 2020 OSS3, Q25CR | from 2020 OSS2 and 168 other models. Is your model not listed? Ask the manufacturer for the correct part number; with that number you can find it using the search function.

Are these original Atag parts?

Yes. They are original manufacturer parts for Atag appliances, with the official manufacturer part number. That way you can be sure the part fits and the warranty on your appliance is preserved.

How much do Atag spare parts cost?

Parts for Atag range from €2.04 to €8,864.43 incl. VAT. A frequently ordered part is the Atag automatic air vent chrome SHR for OSS1/2/3/4 for €80.19. The current price of each part is shown in the list.

Does a part from another Atag model also fit my appliance?

Only if the part number is the same. Atag often uses the same part in several models; if the same part number is listed for your model, it fits. If the number differs, order the part listed for your model. Not sure? Check with the manufacturer or your installer.

How quickly will I receive an Atag part?

Parts in stock: shipping to EU countries from €12.95 (€16.95 for more distant countries), usually 3–5 working days. For made-to-order items, the delivery time is shown on the product page.

Can I return an Atag part?

As a consumer, within the 14-day withdrawal period. You may unpack and inspect, but not install or connect: for a part that has been installed, connected or damaged we deduct the diminished value, up to the full price for circuit boards and electronics. Check the part number beforehand.
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