Navien
Navien Exhaust Thermistor 30020489A
Navien exhaust thermistor 30020489A for LCB 700 combi, regular and system boilers.
At a glance
- Part type: exhaust thermistor
- Appliance family: LCB 700
£6.31
£5.26 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 exhaust thermistor 30020489A is a temperature sensor fitted to the flue or exhaust path of Navien LCB 700 boilers. It reports exhaust gas temperature back to the boiler's control system so that combustion and flue conditions can be monitored. It is supplied as a single component for service replacement.
Signs this part needs replacing
- Boiler locks out or shuts down during or shortly after firing
- Exhaust temperature readings that are erratic or implausible
- Repeated fault codes relating to exhaust or flue temperature
- Boiler cycling or failing to modulate correctly
- Cracked, corroded or heat-damaged thermistor body or wiring
Before you order
- Confirm the appliance model and variant (combi, regular or system; internal or external) against the fit list
- Check the serial number on the appliance data badge
- Verify the part number on the existing thermistor
- Inspect the wiring harness and connector for damage before fitting
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — |
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Documents & drawings
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