Glow-Worm S900001 Thermocouple | Genuine Replacement Spare Part
- SKU
- EDDGLOWWORM114
The S900001 thermocouple is manufactured to exact OEM specifications for sensitivity, thermal response, and electrical characteristics, ensuring reliable flame detection under varying combustion conditions.
Our Expert's Opinion
"A manufacturer-approved thermocouple that provides critical flame detection to maintain safe combustion."Glow-Worm S900001 Thermocouple
The S900001 thermocouple is manufactured to exact OEM specifications for sensitivity, thermal response, and electrical characteristics, ensuring reliable flame detection under varying combustion conditions. Accurate and dependable flame sensing is a cornerstone of boiler safety: without it, the boiler cannot confirm that the gas being supplied has been ignited, which may lead to unsafe conditions if unburned gas is allowed to flow. A properly functioning thermocouple works in concert with other safety interlocks — such as gas valves, flame detectors, and control PCBs — to provide a layered safety envelope that protects both the appliance and the occupants of the building.
Over time, thermocouples can deteriorate due to combustion exposure, soot build-up, oxidation, or mechanical vibration, which can reduce their ability to generate a consistent voltage signal even when a flame is present. Symptoms of a failing thermocouple include persistent ignition failures, frequent boiler lockouts, or the boiler shutting down soon after firing because the control system mistakenly believes the flame has gone out. Replacing a worn or degraded thermocouple with this genuine OEM unit restores dependable flame detection, improves ignition reliability, and enhances overall safety. Installation should always be carried out by a Gas Safe registered engineer, who will ensure correct positioning, secure connections, and compliance with safety and performance standards, helping the boiler respond correctly to flame conditions throughout its operating range.
Glow-Worm 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 | S900001 |
|---|---|
| Product Code | EDDGLOWWORM114 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
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.
Glow-Worm S900001 Thermocouple
The S900001 thermocouple is manufactured to exact OEM specifications for sensitivity, thermal response, and electrical characteristics, ensuring reliable flame detection under varying combustion conditions. Accurate and dependable flame sensing is a cornerstone of boiler safety: without it, the boiler cannot confirm that the gas being supplied has been ignited, which may lead to unsafe conditions if unburned gas is allowed to flow. A properly functioning thermocouple works in concert with other safety interlocks — such as gas valves, flame detectors, and control PCBs — to provide a layered safety envelope that protects both the appliance and the occupants of the building.
Over time, thermocouples can deteriorate due to combustion exposure, soot build-up, oxidation, or mechanical vibration, which can reduce their ability to generate a consistent voltage signal even when a flame is present. Symptoms of a failing thermocouple include persistent ignition failures, frequent boiler lockouts, or the boiler shutting down soon after firing because the control system mistakenly believes the flame has gone out. Replacing a worn or degraded thermocouple with this genuine OEM unit restores dependable flame detection, improves ignition reliability, and enhances overall safety. Installation should always be carried out by a Gas Safe registered engineer, who will ensure correct positioning, secure connections, and compliance with safety and performance standards, helping the boiler respond correctly to flame conditions throughout its operating range.
Glow-Worm 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 | S900001 |
|---|---|
| Product Code | EDDGLOWWORM114 |
| Part Origin | Genuine |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
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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