Flame Detection Electrode Biasi Boiler BI1503108

The Biasi flame detection BI1503108 (flame sensing) electrode is a key safety component that confirms a stable flame during burner operation. After ignition, this electrode detects the presence of flame and sends a signal to the boiler’s PCB/control board. If the flame is not detected, the boiler may shut down or go into lockout to prevent unsafe running.

A worn, damaged, or carbon-coated flame electrode can cause issues such as intermittent ignition, flame failure, lockouts, or unreliable heating/hot water. Replacing the biasi ionisation electrode helps restore consistent flame sensing and stable boiler performance.

Compatibility :

• Advance OV: 15OV, 18OV, 24OV
• Advance C: 25C, 30C, 35C
• Advance S: 25S, 30S

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQ’s)

1) What does a flame detection (flame sensing) electrode do?
It confirms a flame is present after ignition and sends a signal to the boiler PCB. If no flame is detected, the boiler may shut down or lock out for safety.

2) What symptoms suggest the flame detection electrode is faulty?
Common signs include ignition lockouts, intermittent firing, flame failure faults, boiler cutting out, or hot water/heating stopping unexpectedly.

3) Is a flame sensing electrode the same as an ignition (spark) electrode?
No. The ignition electrode creates the spark to light the burner. The flame sensing electrode detects the flame once combustion has started.

4) Which Biasi boilers does this electrode fit?
It fits selected Biasi Advance models, including: Advance 15OV/18OV/24OV (Issue 1 – 2019), Advance 25C/25S, Advance 30C/30S, and Advance 35C. Always match the boiler model and GC number/part number before ordering.

5) Can I install this part myself?
For safety and compliance, installation should be carried out by a qualified engineer. Incorrect fitting can cause ignition issues or unsafe operation.