Navien
Navien Thermistor DHW (Blue Housing) 30022207B
Navien DHW thermistor with blue housing, part 30022207B, for NCB500-1S+ and NCB500-2S combi boilers.
At a glance
- Appliance family: NCB500
£5.57
£4.64 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Navien DHW thermistor (blue housing) is a temperature sensing component used on Navien NCB500 series combi boilers. It monitors domestic hot water temperature so the boiler can regulate output and maintain a stable delivery temperature at the tap. The sensor is identified by its blue housing and Navien part number 30022207B.
Signs this part needs replacing
- Domestic hot water temperature fluctuates or runs hot and cold at the tap
- Boiler fails to modulate correctly during a hot water draw-off
- Hot water output is intermittent or cuts out mid-draw
- DHW temperature reading is erratic or absent on the boiler display
- Visible damage, corrosion or scale build-up on the sensor body or wiring
Before you order
- Confirm your boiler model against the fitment list above
- Check the serial number of your appliance falls within the relevant range
- Compare the housing colour and connector on the existing sensor with this part
- Verify the part number marked on the component you are replacing
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-1S+/32K COMBI - (Serial Number 3924) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S+/41K COMBI - (Serial Number 3712) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — | |
| NAVIEN NCB500-2S/37K COMBI - (Serial Number 3735) | — | — | — |
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.
No technical questions yet for this part.
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