Sanitary Plate Heat Exchanger Saunier Duval Isofast C 28 E Ref. 05733000
If you notice that the domestic hot water is lukewarm or has fluctuating temperatures, you may need a Saunier Duval Isofast C 28 E plate heat exchanger. This part is responsible for transferring heat from the primary circuit to the hot water instantly. When it fails, you may also experience a decrease in the flow rate of DHW. It is compatible with several boilers from the Isofast range, as well as some models from the Isomax and Isotwin ranges. It is recommended to replace it when you experience these symptoms to restore the proper functioning of your hot water system.
VAT included
Consult via WhatsAppSaunier Duval boilers compatible with reference 05733000
Plate heat exchanger with reference 05733000. 11 verified compatibilities: Isofast C 28 E and Isofast C 28 E1.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Saunier Duval Isofast C 28 E | Isofast | Contrasted |
| Saunier Duval Isofast C 28 E1 | Isofast | Contrasted |
| Saunier Duval Isofast F 28 E | Isofast | Contrasted |
| Saunier Duval Isofast F 28 E1 | Isofast | Contrasted |
| Saunier Duval Isofast C 31 E | Isofast | Contrasted |
| Saunier Duval Isofast F 31 E | Isofast | Contrasted |
| Saunier Duval Isomax C 28 E | Isomax | Contrasted |
| Saunier Duval Isomax F 28 E | Isomax | Contrasted |
| Saunier Duval Isotwin C 24 E | Isotwin | Contrasted |
| Saunier Duval Isotwin C 28 EA | Isotwin | Contrasted |
| Saunier Duval Isotwin F 24 E | Isotwin | Contrasted |
Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.
How to check if the ref. 05733000 is the part for your boiler
What determines it is not the boiler model, but the reference printed on the part you already have installed.
- Find the reference printed on the installed part and check whether it matches the catalogue reference 05733000. If it is not visible, do not identify the part from its shape alone.
- Check the full boiler model on its data plate and look for it in the model associations on this page.
- Compare the connections and physical body with the original part before installation.
- If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.
Symptoms and faults that the heat exchanger 05733000 resolves.
The plate heat exchanger transfers heat to the domestic hot water. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
Humidity stains or water droplets appear in the area of the heat exchanger.
Cause: A damaged gasket or PCB allows water to leak out of the circuit at that point.
Dry the area, start the heating and domestic hot water separately, and check which of the two shows humidity first.
- 02
The pressure in the circuit drops on its own, without any visible leaks anywhere.
Cause: An internal crack in the heat exchanger connects the two circuits, and the water is lost without leaking to the outside.
Close the automatic filling valve and monitor the pressure gauge for several days; if the pressure continues to drop, the leak is internal.
- 03
The hot water comes out at a lower temperature than usual, or it cuts off intermittently.
Cause: The plates of the heat exchanger lose their ability to transfer heat as they become coated with scale on the inside.
Open the hot water tap fully for several minutes and check if the temperature remains stable or is dropping.
- 04
The performance of the domestic hot water has been deteriorating over the months, not suddenly.
Cause: Limescale gradually accumulates on the plates and progressively reduces the water flow, not overnight.
Has any descaling of the domestic hot water circuit been done, and what is the hardness of the water in the area?
These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.
Plate heat exchanger data sheet Saunier Duval 05733000
- Catalogue reference
- 05733000
- Brand
- Saunier Duval
- Type of part
- Plate heat exchanger
- Units in stock
- 7 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- Delivery time shown at checkout
- Return
- 14 days
Frequently asked questions about the plate heat exchanger 05733000
Is this plate heat exchanger suitable for a Saunier Duval Isofast C 28 E?
What fault does replacing this heat exchanger resolve?
Does it also work for an Isomax C 28 E or only for the Isofast?
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