Baxi
Baxi NTC Sensor 7809939
NTC sensor with gasket for Baxi Duo-Tec, Eco Elite and Megaflo boilers, part number 7809939.
At a glance
- Also known as NTC-SENSOR-INC-GASKET, 1162115, N2171
Showing prices
£9.86
£8.22 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Baxi 7809939 is an NTC sensor supplied with a gasket. It is used across the Baxi Duo-Tec, Eco Elite and Megaflo appliance families. The sensor reports temperature back to the boiler's control board, which uses that reading to regulate heating and domestic hot water operation.
Signs this part needs replacing
- Boiler locks out or fails to fire, with a temperature-related fault code logged
- Heating or hot water temperature reads incorrectly on the display
- Domestic hot water runs hot and cold instead of holding a steady temperature
- Boiler short cycles or modulates erratically
- Resistance reading across the sensor falls outside the expected range for the measured temperature
Before you order
- Confirm your appliance model and, where applicable, the serial number prefix against the fit list
- Check the fault code or sensor resistance reading to confirm the sensor is at fault rather than the wiring or control board
- Inspect the sealing face and gasket seating before fitting
Compliance
| GC number | H29-101 |
|---|---|
| Alternative numbers | NTC-SENSOR-INC-GASKET, 1162115, N2171 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BAXI DUO-TEC 24 COMBI ErP FROM SERIAL No. PSR16 - ENDING BC | 47-075-96 | 47-075-96 | — | — |
| BAXI DUO-TEC 24 COMBI ErP SERIAL No. ENDING AC | 47-075-96 | 47-075-96 | — | — |
| BAXI DUO-TEC 24 HE | 47-075-23 | 47-075-23 | — | — |
| BAXI DUO-TEC 28 COMBI ErP FROM SERIAL No. PSS16 - ENDING BC | 47-075-97 | 47-075-97 | — | — |
| BAXI DUO-TEC 28 COMBI ErP SERIAL No. ENDING AC | 47-075-97 | 47-075-97 | — | — |
| BAXI DUO-TEC 28 HE | 47-075-25 | 47-075-25 | — | — |
| BAXI DUO-TEC 28 HE LPG | 47-075-39 | 47-075-39 | — | — |
| BAXI DUO-TEC 28 LPG COMBI ErP FROM SERIAL No. PSW16 - ENDING BC | 47-075-98 | 47-075-98 | — | — |
| BAXI DUO-TEC 28 LPG COMBI ErP SERIAL No. ENDING AC | 47-075-98 | 47-075-98 | — | — |
| BAXI DUO-TEC 33 COMBI ErP FROM SERIAL No. PSX16 - ENDING BC | 47-075-99 | 47-075-99 | — | — |
Showing 10 of 222 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
manual
BAXI appliance manual — DUO-TEC 24 COMBI ErP FROM SERIAL No. PSR16 - ENDING BC (GC 47-075-96), DUO-TEC 28 COMBI ErP FROM SERIAL No. PSS16 - ENDING BC (GC 47-075-97), DUO-TEC 28 LPG COMBI ErP FROM SERIAL No. PSW16 - ENDING BC (GC 47-075-98), DUO-TEC 33 COMBI ErP FROM SERIAL No. PSX16 - ENDING BC (GC 47-075-99), DUO-TEC 40 COMBI ErP FROM SERIAL No. PST16 - ENDING BC (GC 47-077-03)
manualmanualBAXI appliance manual — DUO-TEC 24 COMBI ErP SERIAL No. ENDING AC (GC 47-075-96), DUO-TEC 28 COMBI ErP SERIAL No. ENDING AC (GC 47-075-97), DUO-TEC 28 LPG COMBI ErP SERIAL No. ENDING AC (GC 47-075-98), DUO-TEC 33 COMBI ErP SERIAL No. ENDING AC (GC 47-075-99), DUO-TEC 40 COMBI ErP SERIAL No. ENDING AC (GC 47-077-03)
manualmanualBAXI appliance manual — DUO-TEC 24 HE (GC 47-075-23), DUO-TEC 28 HE (GC 47-075-25), DUO-TEC 33 HE (GC 47-075-24), DUO-TEC 40 HE (GC 47-075-26)
manualmanualBAXI appliance manual — DUO-TEC 28 HE LPG (GC 47-075-39)
manualmanualBAXI appliance manual — DUO-TEC COMBI 24 HE A (AFTER SERIAL No. BTG 0815) (GC 47-075-35), DUO-TEC COMBI 24 HE A (BEFORE SERIAL No. BTG 0815) (GC 47-075-35), DUO-TEC COMBI 28 HE A (AFTER SERIAL No. CAC 0929) (GC 47-075-36), DUO-TEC COMBI 28 HE A (BEFORE SERIAL No. CAC 0929) (GC 47-075-36), DUO-TEC COMBI 33 HE A (AFTER SERIAL No. BTH 1112) (GC 47-075-37), DUO-TEC COMBI 33 HE A (BEFORE SERIAL No. BTH 1112) (GC 47-075-37)
manualmanualBAXI appliance manual — DUO-TEC COMBI 40 HE A (GC 47-075-38)
manualmanualBAXI appliance manual — MEGAFLO 15 HE A SYSTEM (GC 41-075-55), MEGAFLO 18 HE A SYSTEM (GC 41-075-56), MEGAFLO 24 HE A SYSTEM BEFORE BTF 0932 (GC 41-075-57), MEGAFLO 24 HE A SYSTEM FROM SERIAL NO BTF 0932 (GC 41-075-57), MEGAFLO 28 HE A SYSTEM BEFORE CAB 1112 (GC 41-075-58), MEGAFLO 28 HE A SYSTEM FROM SERIAL NO CAB 1112 (GC 41-075-58), MEGAFLO 32 HE A SYSTEM (GC 41-075-59)
manualmanualBAXI appliance manual — MEGAFLO 15 HE SYSTEM (GC 41-075-52), MEGAFLO 18 HE SYSTEM (GC 41-075-53), MEGAFLO 24 HE SYSTEM (GC 41-075-47), MEGAFLO 28 HE SYSTEM (GC 41-075-57)
manualmanualBAXI appliance manual — MEGAFLO 18 HE A SYSTEM LPG (GC 41-075-61), MEGAFLO 28 HE A SYSTEM LPG BEFORE SERIAL No. FSR 1112 (GC 41-075-62), MEGAFLO 28 HE A SYSTEM LPG FROM SERIAL No. FSR 1112 (GC 41-075-62), MEGAFLO 32 HE A SYSTEM LPG (GC 41-075-59)
manualmanualBAXI appliance manual — MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING AC (GC 41-470-18), MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING BC (GC 41-470-18), MEGAFLO SYSTEM ErP 15 SERIAL No. ENDING CC (GC 41-470-18), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING AC (GC 41-470-19), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING BC (GC 41-470-19), MEGAFLO SYSTEM ErP 18 SERIAL No. ENDING CC (GC 41-470-19), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING AC (GC 41-470-20), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING BC (GC 41-470-20), MEGAFLO SYSTEM ErP 24 SERIAL No. ENDING CC (GC 41-470-20), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING AC (GC 41-470-21), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING BC (GC 41-470-21), MEGAFLO SYSTEM ErP 28 SERIAL No. ENDING CC (GC 41-470-21), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING AC (GC 41-470-22), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING BC (GC 41-470-22), MEGAFLO SYSTEM ErP 32 SERIAL No. ENDING CC (GC 41-470-22)
manualmanualBAXI appliance manual — PLATINUM + 40 COMBI (GC 47-077-41)
manualmanualBAXI appliance manual — PLATINUM 24 COMBI ErP SERIAL No. ENDING AC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING BC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING CC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING DC (GC 47-077-04), PLATINUM 24 COMBI ErP SERIAL No. ENDING EC (GC 47-077-04), PLATINUM 28 COMBI ErP SERIAL No. ENDING AC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING BC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING CC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING DC (GC 47-077-05), PLATINUM 28 COMBI ErP SERIAL No. ENDING EC (GC 47-077-05), PLATINUM 33 COMBI ErP SERIAL No. ENDING AC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING BC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING CC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING DC (GC 47-077-06), PLATINUM 33 COMBI ErP SERIAL No. ENDING EC (GC 47-077-06), PLATINUM 40 COMBI ErP SERIAL No. ENDING AC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING BC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING CC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING DC (GC 47-077-07), PLATINUM 40 COMBI ErP SERIAL No. ENDING EC (GC 47-077-07)
manualmanualBAXI appliance manual — PLATINUM 24HE COMBI (GC 47-075-20), PLATINUM 28HE COMBI (GC 47-075-21), PLATINUM 33HE COMBI (GC 47-075-29), PLATINUM 40HE COMBI (GC 47-075-30), PLATINUM COMBI 24HE (GC 47-075-27), PLATINUM COMBI 28HE (GC 47-075-28)
manualmanualBAXI appliance manual — PLATINUM COMBI 24 HE A - AFTER SERIAL No. BMY 0815 (GC 47-075-31), PLATINUM COMBI 28 HE A - AFTER SERIAL No. BNC 0932 (GC 47-075-32), PLATINUM COMBI 33 HE A - AFTER SERIAL No. BNE1112 (GC 47-075-33), PLATINUM COMBI 40 HE A (GC 47-075-34)
manualmanualBAXI appliance manual — PLATINUM COMBI 24 HE A - BEFORE SERIAL No. BMY 0815 (GC 47-075-31), PLATINUM COMBI 28 HE A - BEFORE SERIAL No. BNC 0932 (GC 47-075-32), PLATINUM COMBI 33 HE A - BEFORE SERIAL No. BNE1112 (GC 47-075-33)
manualmanualPOTTERTON appliance manual — GOLD COMBI 24 HE (GC 47-590-05), GOLD COMBI 28 HE (GC 47-590-06), GOLD COMBI 33 HE (GC 47-590-19)
manualmanualPOTTERTON appliance manual — GOLD COMBI ErP 24 - SERIAL No. ENDING AC (GC 47-393-43), GOLD COMBI ErP 24 - SERIAL No. ENDING BC (GC 47-393-43), GOLD COMBI ErP 24 - SERIAL No. ENDING DC (GC 47-393-43), GOLD COMBI ErP 24 - SERIAL No. ENDING EC (GC 47-393-43), GOLD COMBI ErP 28 - SERIAL No. ENDING AC (GC 47-393-44), GOLD COMBI ErP 28 - SERIAL No. ENDING BC (GC 47-393-44), GOLD COMBI ErP 28 - SERIAL No. ENDING DC (GC 47-393-44), GOLD COMBI ErP 28 - SERIAL No. ENDING EC (GC 47-393-44), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING AC (GC 47-393-45), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING BC (GC 47-393-45), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING DC (GC 47-393-45), GOLD COMBI ErP 28 LPG - SERIAL No. ENDING EC (GC 47-393-45), GOLD COMBI ErP 33 - SERIAL No. ENDING AC (GC 47-393-46), GOLD COMBI ErP 33 - SERIAL No. ENDING BC (GC 47-393-46), GOLD COMBI ErP 33 - SERIAL No. ENDING DC (GC 47-393-46), GOLD COMBI ErP 33 - SERIAL No. ENDING EC (GC 47-393-46)
manualmanualPOTTERTON appliance manual — GOLD COMBI HE A 24 - AFTER SERIAL No. BMX 0815 AND AFTER GNH 0815 (GC 47-393-18), GOLD COMBI HE A 28 - AFTER SERIAL No. BNF 0932 AND AFTER GNK 0932 (GC 47-393-19), GOLD COMBI HE A 28 LPG (GC 47-393-30), GOLD COMBI HE A 33 - AFTER SERIAL No. GNL1112 (GC 47-393-20)
manualmanualPOTTERTON appliance manual — GOLD COMBI HE A 24 - BEFORE SERIAL No. BMX 0815 AND GNH 0815 (GC 47-393-18), GOLD COMBI HE A 28 - BEFORE SERIAL No. BNF 0932 AND GNK 0932 (GC 47-393-19), GOLD COMBI HE A 33 - BEFORE SERIAL No. GNL 1112 (GC 47-393-20), GOLD SYSTEM HE A 28 - AFTER SERIAL No. HSA 1112 (GC 41-592-17), GOLD SYSTEM HE A 28 - BEFORE SERIAL No. HSA 1112 (GC 41-592-17)
manualmanualPOTTERTON appliance manual — GOLD SYSTEM ErP 18 SERIAL No. ENDING AC (GC 41-592-39), GOLD SYSTEM ErP 18 SERIAL No. ENDING BC & CC (GC 41-592-39), GOLD SYSTEM ErP 18 SERIAL No. ENDING DC (GC 41-592-39), GOLD SYSTEM ErP 24 SERIAL No. ENDING AC (GC 41-592-40), GOLD SYSTEM ErP 24 SERIAL No. ENDING BC & CC (GC 41-592-40), GOLD SYSTEM ErP 24 SERIAL No. ENDING DC (GC 41-592-40), GOLD SYSTEM ErP 28 SERIAL No. ENDING AC (GC 41-592-41), GOLD SYSTEM ErP 28 SERIAL No. ENDING BC & CC (GC 41-592-41), GOLD SYSTEM ErP 28 SERIAL No. ENDING DC (GC 41-592-41)
manualmanualPOTTERTON appliance manual — HEATMAX COMBI 24 HE (GC 47-393-27), HEATMAX COMBI 28 HE (GC 47-393-28), HEATMAX COMBI 33 HE - AFTER SERIAL No. FMN 1112 (GC 47-393-29), HEATMAX COMBI 33 HE - BEFORE SERIAL No. FMN 1112 (GC 47-393-29)
manualmanualPOTTERTON appliance manual — PROMAX 24 STORE 115L CYLINDER ErP - SERIAL No. ENDING AC (GC 41-592-48), PROMAX 24 STORE 115L CYLINDER ErP - SERIAL No. ENDING BC (GC 41-592-48), PROMAX 24 STORE 150L CYLINDER ErP - SERIAL No. ENDING AC (GC 41-592-49), PROMAX 24 STORE 150L CYLINDER ErP - SERIAL No. ENDING BC (GC 41-592-49), PROMAX 24 STORE 90L CYLINDER ErP - SERIAL No. ENDING AC (GC 41-592-47), PROMAX 24 STORE 90L CYLINDER ErP - SERIAL No. ENDING BC (GC 41-592-47)
manualmanualPOTTERTON appliance manual — PROMAX COMBI Erp 24 - SERIAL No. ENDING AC (GC 47-393-47), PROMAX COMBI Erp 24 - SERIAL No. ENDING BC & CC (GC 47-393-47), PROMAX COMBI Erp 24 - SERIAL No. ENDING DC (GC 47-393-47), PROMAX COMBI Erp 24 - SERIAL No. ENDING EC (GC 47-393-47), PROMAX COMBI Erp 28 - SERIAL No. ENDING AC (GC 47-393-48), PROMAX COMBI Erp 28 - SERIAL No. ENDING BC & CC (GC 47-393-48), PROMAX COMBI Erp 28 - SERIAL No. ENDING DC (GC 47-393-48), PROMAX COMBI Erp 28 - SERIAL No. ENDING EC (GC 47-393-48), PROMAX COMBI Erp 33 - SERIAL No. ENDING AC (GC 47-393-49), PROMAX COMBI Erp 33 - SERIAL No. ENDING BC & CC (GC 47-393-49), PROMAX COMBI Erp 33 - SERIAL No. ENDING DC (GC 47-393-49), PROMAX COMBI Erp 33 - SERIAL No. ENDING EC (GC 47-393-49), PROMAX PLUS A SYSTEM 24 HE (GC 47-393-47)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 24 HE (GC 47-393-17), PROMAX COMBI PLUS 28 HE (GC 47-590-04), PROMAX COMBI PLUS 33 HE (GC 47-590-03)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 24 HE A (GC 47-393-21), PROMAX COMBI PLUS 28 HE A (AFTER SERIAL NO. AWA 0919) (GC 47-393-22), PROMAX COMBI PLUS 28 HE A (BEFORE SERIAL NO. AWA 0919) (GC 47-393-22), PROMAX COMBI PLUS 33 HE A (AFTER SERIAL NO. ATY 1112) (GC 47-393-23), PROMAX COMBI PLUS 33 HE A (BEFORE SERIAL NO. ATY 1112) (GC 47-393-23)
manualmanualPOTTERTON appliance manual — PROMAX COMBI PLUS 24 HE LPG (GC 47-393-24)
manualmanualPOTTERTON appliance manual — PROMAX HE STORE 115 LITRE (GC 41-591-76), PROMAX HE STORE 150 LITRE (GC 41-591-77), PROMAX HE STORE 90 LITRE (GC 41-601-24)
manualmanualPOTTERTON appliance manual — PROMAX PLUS A SYSTEM 12 HE (GC 41-591-99), PROMAX PLUS A SYSTEM 15 HE (GC 41-592-01), PROMAX PLUS A SYSTEM 18 HE (GC 41-592-02), PROMAX PLUS A SYSTEM 24 HE (AFTER SERIAL NO. AWD 0932) (GC 41-592-03), PROMAX PLUS A SYSTEM 24 HE (BEFORE SERIAL NO. AWD 0932) (GC 41-592-03), PROMAX PLUS A SYSTEM 32 HE (GC 41-592-04)
manualmanualPOTTERTON appliance manual — PROMAX PLUS SYSTEM 12 HE (GC 41-591-90), PROMAX PLUS SYSTEM 15 HE (GC 41-591-91), PROMAX PLUS SYSTEM 18 HE (GC 41-591-92), PROMAX PLUS SYSTEM 24 HE (GC 41-601-21), PROMAX PLUS SYSTEM 32 HE (GC 41-591-93)
manualmanualPOTTERTON appliance manual — PROMAX PLUS SYSTEM 24 HE LPG (AFTER SERIAL NO. ELW 0932) (GC 41-592-11), PROMAX PLUS SYSTEM 24 HE LPG (BEFORE SERIAL NO. ELW 0932) (GC 41-592-11)
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