Andrews
Andrews Water Flow Sensor Set 3 G104
Water flow sensor set 3 for Andrews Fastflo and hot water appliances, part number G104.
At a glance
- Also known as 1821774
£99.46
£82.88 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 Andrews water flow sensor set 3 (part number G104) is a replacement sensor assembly for Andrews water heaters. It monitors water flow within the appliance to support correct operation. This set is compatible with several Fastflo and hot water spares models.
Signs this part needs replacing
- The appliance fails to detect water flow when a hot water tap is opened.
- No hot water or intermittent hot water delivery.
- The boiler does not fire on a hot water demand.
- Error codes relating to water flow or sensor failure appear on the control panel.
- The sensor shows signs of damage, debris or scale build-up.
Before you order
- Confirm your appliance model matches one of the models listed in the Fits section.
- Check the part number G104 against your existing sensor.
- Verify the sensor set version (set 3) is correct for your appliance.
- If unsure, consult a qualified heating engineer.
Compliance
| Alternative numbers | 1821774 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWH42 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWH56 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WH42 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WH56 | — | — | — |
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.