Intergas 74337 Ignition & Ionisation Electrode | Genuine Replacement Spare Part
- SKU
- EDDINTERGAS07
Our Expert's Opinion
"Fits all HRE Compact, Combi Compact & ECO RF boilers. Gas Safe fitting required."Intergas 74337 Ignition & Ionisation Electrode – Genuine Replacement Spare Part
The Intergas 74337 is a genuine combined ignition and ionisation electrode, designed to fit all Intergas HRE Compact, Combi Compact, and ECO RF boilers. This is the current approved replacement for the earlier part number 209327, and is one of the most commonly replaced wear items across the entire Intergas boiler range. Unlike many boiler designs that use separate electrodes for ignition and flame sensing, the Intergas 74337 is a single combined unit that performs both functions, generating the spark that lights the burner and monitoring the ionisation signal that proves a stable flame is present.
Understanding how both functions work together is important for any engineer diagnosing an ignition fault on an Intergas boiler. When the boiler receives a demand for heat, the ignition module energises the electrode, which generates a high-voltage spark across a precisely set gap between the electrode tip and the burner body. This spark ignites the gas and air mixture at the burner. Once the flame is established, the same electrode passes a very small ionisation current through the flame, typically a few microamps, back to the ignition module. The module reads this signal and confirms to the boiler's PCB that a genuine flame is present. If that signal is absent or too weak, the boiler shuts the gas valve and locks out, preventing an unlit gas flow from continuing.
Because the electrode performs both of these safety-critical roles, even a small amount of wear, carbon contamination, or physical damage can significantly degrade its performance. A cracked ceramic insulator, a tip that has eroded from repeated sparking, a gap that has widened over time, or a layer of carbon built up on the electrode tip can all reduce the strength of both the spark and the ionisation signal, leading to intermittent ignition failures, nuisance lockouts, and fault codes that can easily be misdiagnosed as ignition module or gas valve issues.
Key Features:
Part Number: 74337 (also referenced as 074337)
Replaces: 209327
Type: Combined ignition and ionisation electrode
Function: Generates ignition spark and monitors flame ionisation signal
Application: All Intergas HRE and Rapid boiler models
Genuine Intergas spare part - manufactured to full OEM specification
Must be fitted by a Gas Safe registered engineer
Compatible Boilers:
Intergas Combi Compact HRE 24/18, 28/24, 36/30, 36/40
Intergas HRE Compact 18 OV, 24 OV, 30 OV
Intergas HRE Compact 18 SB, 24 SB, 30 SB, 40 SB
Intergas ECO RF 24, 30, 36
Intergas Rapid 25, 32, 25 Plus, 32 Plus
The 74337 fits all Intergas HRE and Rapid boiler models, making it one of the most versatile and widely applicable electrodes in the Intergas spare parts range.
Why the Electrode Should Be Replaced at Every Service:
The ignition electrode is a consumable component. Each time the boiler fires, the high-voltage spark causes a tiny amount of material to be removed from the electrode tip through a process called erosion. Over thousands of firing cycles across a service interval, this erosion gradually widens the spark gap, weakens the spark intensity, and reduces the reliability of the ionisation signal. Replacing the electrode as part of every annual service is a straightforward and low-cost step that eliminates one of the most common causes of ignition-related callbacks and keeps the boiler firing reliably throughout the coming year.
Intergas provide a 1 year warranty on all spare parts. Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 74337 |
|---|---|
| Product Code | EDDINTERGAS07 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Intergas |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
Intergas 74337 Ignition & Ionisation Electrode – Genuine Replacement Spare Part
The Intergas 74337 is a genuine combined ignition and ionisation electrode, designed to fit all Intergas HRE Compact, Combi Compact, and ECO RF boilers. This is the current approved replacement for the earlier part number 209327, and is one of the most commonly replaced wear items across the entire Intergas boiler range. Unlike many boiler designs that use separate electrodes for ignition and flame sensing, the Intergas 74337 is a single combined unit that performs both functions, generating the spark that lights the burner and monitoring the ionisation signal that proves a stable flame is present.
Understanding how both functions work together is important for any engineer diagnosing an ignition fault on an Intergas boiler. When the boiler receives a demand for heat, the ignition module energises the electrode, which generates a high-voltage spark across a precisely set gap between the electrode tip and the burner body. This spark ignites the gas and air mixture at the burner. Once the flame is established, the same electrode passes a very small ionisation current through the flame, typically a few microamps, back to the ignition module. The module reads this signal and confirms to the boiler's PCB that a genuine flame is present. If that signal is absent or too weak, the boiler shuts the gas valve and locks out, preventing an unlit gas flow from continuing.
Because the electrode performs both of these safety-critical roles, even a small amount of wear, carbon contamination, or physical damage can significantly degrade its performance. A cracked ceramic insulator, a tip that has eroded from repeated sparking, a gap that has widened over time, or a layer of carbon built up on the electrode tip can all reduce the strength of both the spark and the ionisation signal, leading to intermittent ignition failures, nuisance lockouts, and fault codes that can easily be misdiagnosed as ignition module or gas valve issues.
Key Features:
Part Number: 74337 (also referenced as 074337)
Replaces: 209327
Type: Combined ignition and ionisation electrode
Function: Generates ignition spark and monitors flame ionisation signal
Application: All Intergas HRE and Rapid boiler models
Genuine Intergas spare part - manufactured to full OEM specification
Must be fitted by a Gas Safe registered engineer
Compatible Boilers:
Intergas Combi Compact HRE 24/18, 28/24, 36/30, 36/40
Intergas HRE Compact 18 OV, 24 OV, 30 OV
Intergas HRE Compact 18 SB, 24 SB, 30 SB, 40 SB
Intergas ECO RF 24, 30, 36
Intergas Rapid 25, 32, 25 Plus, 32 Plus
The 74337 fits all Intergas HRE and Rapid boiler models, making it one of the most versatile and widely applicable electrodes in the Intergas spare parts range.
Why the Electrode Should Be Replaced at Every Service:
The ignition electrode is a consumable component. Each time the boiler fires, the high-voltage spark causes a tiny amount of material to be removed from the electrode tip through a process called erosion. Over thousands of firing cycles across a service interval, this erosion gradually widens the spark gap, weakens the spark intensity, and reduces the reliability of the ionisation signal. Replacing the electrode as part of every annual service is a straightforward and low-cost step that eliminates one of the most common causes of ignition-related callbacks and keeps the boiler firing reliably throughout the coming year.
Intergas provide a 1 year warranty on all spare parts. Electrical Deals Direct now sells a wide range of spare parts. If you cannot see the item you require on our website, please call 01934 253600 or email [email protected] for more information.
| MPN | 74337 |
|---|---|
| Product Code | EDDINTERGAS07 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Intergas |
Delivery Information -
Standard delivery for all orders over £150 ex-VAT are free of charge.
If we can speed this up, we will, but you can also select Express Delivery when you check out and get your purchase more quickly (usually the next working day, subject to a 1pm cut-off): there is an extra charge for this ranging from £5 to £29.99 depending on the products you are buying.
We partner with several of the best UK carriers (such as TNT, Royal Mail, DPD etc) depending on the type of product and the warehouse it is coming from, and also with some pallet companies for larger items. All of these operate during normal Monday – Friday working hours, and we expect all deliveries to arrive in 5 days. For more details checkout this page.
Gledhill Cylinders – Delivery Charge -
For all Gledhill Cylinders, a flat delivery charge of £33.00 (ex-VAT) applies, regardless of order value or delivery method. This will be added automatically at checkout.
Returns Information -
Having to return a product because it doesn’t fit, or is not what you wanted, is really annoying! To try and make sure this isn’t necessary we have lots of helpful advice on our site, and you should feel free to call our experts on the number above to check if you are in any doubt at all – we’re always happy to help.
But if you do, don’t worry, just contact us and we’ll get it sorted (note that for trade customers there may be a restocking fee). If you need it, we can usually arrange the carrier to pick it up.
For full details of our policy, check out the small print here.
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