Glow-Worm 0020136541 Heat Exchanger DWH | Replacement Spare Part
- SKU
- EDDGLOWWORM121
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The Glow-Worm Domestic Hot Water (DHW) Heat Exchanger is designed to restore reliable and efficient hot water performance in Glow-Worm combi and system boilers. Manufactured to Glow-Worm’s exact specifications, this heat exchanger ensures correct fitment, optimal heat transfer, and long-term durability that aftermarket alternatives often cannot match.
This unit functions as a secondary heat exchanger, transferring heat from the boiler’s primary circuit to the domestic hot water supply while keeping both water systems completely separate. This guarantees safe, hygienic hot water delivery without contamination. Its precision-engineered plate or coil construction maximises heat transfer efficiency while maintaining stable water pressure and consistent outlet temperature.
Over time, DHW heat exchangers can become blocked by limescale, debris, or corrosion, leading to reduced hot water flow, temperature fluctuations, boiler fault codes, or complete loss of hot water. Replacing the exchanger restores the boiler to its original performance levels, improving efficiency and reliability while reducing the risk of repeat failures.
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 | 2136541 |
|---|---|
| Product Code | EDDGLOWWORM121 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
| Empty Weight | 2 |
| Full Weight (kG) | .5 |
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 0020136541 Heat Exchanger DWH
The Glow-Worm Domestic Hot Water (DHW) Heat Exchanger is designed to restore reliable and efficient hot water performance in Glow-Worm combi and system boilers. Manufactured to Glow-Worm’s exact specifications, this heat exchanger ensures correct fitment, optimal heat transfer, and long-term durability that aftermarket alternatives often cannot match.
This unit functions as a secondary heat exchanger, transferring heat from the boiler’s primary circuit to the domestic hot water supply while keeping both water systems completely separate. This guarantees safe, hygienic hot water delivery without contamination. Its precision-engineered plate or coil construction maximises heat transfer efficiency while maintaining stable water pressure and consistent outlet temperature.
Over time, DHW heat exchangers can become blocked by limescale, debris, or corrosion, leading to reduced hot water flow, temperature fluctuations, boiler fault codes, or complete loss of hot water. Replacing the exchanger restores the boiler to its original performance levels, improving efficiency and reliability while reducing the risk of repeat failures.
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 | 2136541 |
|---|---|
| Product Code | EDDGLOWWORM121 |
| Part Origin | Compatible |
| Part or Accessory? | Part |
| Brand | Glow-Worm |
| Empty Weight | 2 |
| Full Weight (kG) | .5 |
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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