Bitron Immersion Combi Boiler Temperature (NTC) Sensor - Red Connector (Baymak, Baxi, Airfel, Ariston Compatible)

This is a vital measuring element (thermistor) that transmits the temperature of domestic hot water or central heating water in combi boiler systems to the electronic board in real time. Made by Bitron and frequently fitted as original factory equipment in Baymak, Baxi, Airfel and Ariston combi boilers, this immersion-type NTC sensor definitively solves flame modulation problems and hot water fluctuations in faulty appliances.

Key Technical Specifications and OEM Values

• Reference / OEM Codes: 710056200 and 721309400
• Sensor Type: Immersion Type. In direct contact with water, it responds much faster and more precisely than pipe-mounted (clip-on) models.
• Compatible Brands: Baymak, Baxi, Airfel, Ariston
• Connection and Construction: It has a red 2-pin push-on connector that prevents mix-ups and an O-ring seal integrated into the body for pressure-tight sealing.

Technician Tips and Installation Warnings in the Field

• Important: Before replacing immersion-type (NTC) sensors, never forget to drain the appliance's mains water or system water (reduce the combi boiler pressure to zero).
• When the appliance comes in with complaints of "no hot water" or "water keeps going hot and cold", check whether there is heavy scale on the metal probe of the old sensor. A thick layer of scale causes even a healthy sensor to read the water as cold and the combi boiler to overheat the water.
• During installation, the O-ring (black seal) on the new sensor must be fully seated in its recess and the clip/circlip fitted. Even the smallest drop of leaking water can oxidize the pins inside the red connector and cause a short circuit (fault code).

Frequently Asked Questions

What does an immersion-type NTC sensor do?

It is the measuring element (thermistor) that transmits the temperature of domestic hot water or central heating water in the combi boiler to the electronic board in real time. When faulty, it causes flame modulation problems and hot water fluctuations; as an immersion type, it is in direct contact with the water and responds faster than pipe-mounted clip-on models.

What are the equivalent / original (OEM) codes of this NTC sensor?

It replaces parts with OEM codes 710056200 and 721309400. The Yedepa product code is 20500010.

Which combi boiler brands is the Bitron NTC sensor compatible with?

It is compatible with Baymak, Baxi, Airfel and Ariston combi boilers. It has a red 2-pin push-on connector that prevents mix-ups and an O-ring seal integrated into the body.

Which fault symptoms call for replacing the NTC sensor?

If the combi boiler gives no hot water or the water keeps going hot and cold, the NTC sensor is suspect; also check whether there is heavy scale on the metal probe of the old sensor. Do not forget to reduce the boiler pressure to zero and drain the system water before replacement.

Can I buy regularly with an invoice as a service company/technician?

Yes, all our sales are invoiced. All orders, including those from service companies and technicians, are placed directly through our website.

How do I track my shipment after ordering?

Your shipment tracking number is sent to your e-mail and phone after ordering; you can follow its status in the “Where Is My Shipment?” section.

Can I return or exchange the product?

Yes. Under Consumer Protection Law No. 6502 you have the right of withdrawal/return within 14 days of delivery. To avoid ordering the wrong model, we recommend that you verify compatibility before ordering. Details are on our “Delivery, Returns and Exchanges” page.

What payment and instalment options are available?

You can pay by debit/credit card and Tosla, and take advantage of instalment/credit options through Fibabanka and Akbank. Current options are listed on our “Payment Options” page.

Where is Yedepa located and how is delivery made?

Yedepa is an e-commerce site; orders are placed through yedepa.com and shipped to your address by courier from our warehouses across Turkey and from our contracted suppliers. Our head office is at Cennet Mah. 2. Yavuz Selim Cad. No:68/A, Küçükçekmece / İstanbul.