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A.O. Smith collector sensor 20K 2 pins
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A.O. Smith collector sensor 20K 2 pins 0308904(S)

€ 111.02 incl. VAT

Original spare part A.O. Smith. Type: Sensor. Application: Hot water cylinder / SGE 40 (from 31-12-2012). Delivery time: approx. 3–4 weeks. Supplier code: 0308904(S).

Order-on-demand item — delivery time approx. 3–4 weeks — ordered specially for you

SKU: 8750802 Categories: , Brand:

Price and stock checked on 20 October 2026.

Made-to-order item — ordered specially for you, see delivery time below
EU delivery from € 12.95 · Shipping & payment

Price incl. VAT. Any delivery costs are calculated in the basket — see shipping & delivery.

Does this fit my appliance?
ApplicationHot water cylinder
Series / modelSGE 60 (up to 01-09-1990) and 5 other models
A.O. Smith number0308904(S)
Article number8750802
Not sure? Search by article or manufacturer number or check with the manufacturer or your installer.
All spare parts for A.O. Smith SGE 60 (up to 01-09-1990) →
Made-to-order item — this spare part is not on our shelf and is ordered specially for you bij de fabrikant, levertijd ca 3-4 weken. Check your appliance type and the part number beforehand. Order-on-demand items also carry a 14-day right of withdrawal for consumers; for a part that has been installed or connected we deduct the diminished value. In doubt? Ask the manufacturer or your installer (see also returns).
9,0/10 WebwinkelKeur⚠ Order-on-demand item: ordered specially for you iDEAL · Klarna · Bancontact 085-303 7272 ma–vr 08:00–17:00

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A.O. Smith collector sensor 20K 2 pins: original A.O. Smith spare part, type: Sensor. Application: Hot water cylinder (SGE 40 (from 31-12-2012)). Manufacturer number: 0308904(S); Instalpunt article number: 8750802.

According to the A.O. Smith parts lists, this part fits 6 models, including A.O. Smith SGE 40 (from 31-12-2012), A.O. Smith SGE 40 (up to 01-09-1990) and A.O. Smith SGE 40 (up to 30-12-2012). The full list is under “Fits”.

Special-order item (delivery time approx. 3–4 weeks): it is ordered specially for you from the manufacturer and is non-returnable.

Check the rating plate of your appliance before ordering; if in doubt, ask the manufacturer or your installer.

Product information: A.O. Smith collector sensor 20K 2 pins 0308904(S)

BrandA.O. Smith spare parts
A.O. Smith manufacturer number0308904(S)
Instalpunt article number8750802
EAN8717449195335
Part typeSensor (All A.O. Smith sensors · sensors of all brands)
ApplicationHot water cylinder
Suitable for6 A.O. Smith models (see list)
DeliverySpecial-order item, delivery time approx. 3–4 weeks
Price€ 111,02 incl. VAT
OriginSupplied through the official technical wholesale channel, under A.O. Smith number 0308904(S)

Also known as: voeler, temperatuursensor, NTC-sensor.

Fits 6 A.O. Smith models

The part A.O. Smith collector sensor 20K 2 pins 0308904(S) is in the official parts list of these A.O. Smith appliances. Click a model for the complete parts list and exploded view.

A.O. Smith Hot water cylinder (6)

Check the rating plate of your appliance. Not sure whether this part fits? Check with the manufacturer or your installer; with the correct manufacturer number you can order it here directly.

Position on the parts diagram

This part appears on the exploded view of 6 appliances. Open the drawing for the appliance and click the number to check that you have the right part.

For which fault is a A.O. Smith sensor replaced?

According to the fault code database, these A.O. Smith fault codes point to this type of part. Always check first that the code matches the appliance type on the rating plate.

CodeWhat is going on
045Sensor is niet (juist) aangesloten.
78ABottom sensor fault
502Sensorstoring: Sensor is niet (juist) aangesloten.
503Sensor fault: damaged wiring and/or defective sensor.
504Sensor fault: damaged wiring and/or defective sensor.
787Top sensor fault

All A.O. Smith fault codes explained

Indicative: the same code can have a different cause depending on the situation. Have work on gas, flue or burner adjustment carried out by a qualified installer.

Available: Sensor for the same appliances

This part is currently out of stock. These A.O. Smith parts of the same type are listed for at least one of the same appliance models and are available.

Before ordering, check the manufacturer number in the spare parts list or exploded view of your appliance.

Frequently asked questions about this item

Does the A.O. Smith collector sensor 20K 2 pins 0308904(S) fit my appliance?
This part is in the parts list of 6 A.O. Smith models, namely the SGE 40 (from 31-12-2012), SGE 40 (up to 01-09-1990), SGE 40 (up to 30-12-2012), SGE 60 (from 31-12-2012), SGE 60 (up to 01-09-1990), SGE 60 (up to 30-12-2012). The model type is on the rating plate of your appliance. If in doubt, ask the manufacturer or your installer.
What is the delivery time of this made-to-order item?
This is a special-order item: we order it specially for you from the wholesaler. The expected delivery time is approx. 3–4 weeks. You can also see the delivery time next to the stock status at the top of this page.
Can I return this made-to-order item?
Yes, as a consumer you also have a 14-day right of withdrawal for an order-on-demand item. Do not install or connect it; for a part that has been installed or connected we deduct the diminished value. So check the article number and the rating plate of your appliance beforehand. Is something wrong with your order? Then contact us via info@instalpunt.nl. The full terms and conditions are on returns.
What does shipping cost?
Shipping costs € 12.95 to Austria, Denmark, Italy, Spain and Sweden and € 16.95 to other EU countries. In-stock items ordered before 2 pm are dispatched the same working day; delivery usually takes 3–5 working days. Details: Shipping.
I have a fault code, which part do I need?
Look up the code in the fault code finder: per brand and appliance it shows what the code means and which part goes with it. If the code is listed with this part, the part belongs to that fault.

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