Saunier Duval Honeywell Air Pressure Switch C6065FH1052:2 Ref. 95000037
Air pressure switch manufactured by Honeywell (Yamatake), installed in Saunier Duval Isofast, Isomax, Opalia, Thelia, and Thelia Twin boilers. It measures the pressure generated by the fan (0.60 mbar, maximum 6 mbar) to confirm the draft before ignition and cuts the circuit if it is not detected. It is replaced when the boiler locks with the fan running.
VAT included
Consult via WhatsAppCompatible Wiesberg boilers
Pressure switch. Five confirmed compatibilities: Duval Isofast and Duval Isomax.
Proven compatibility
| Boiler model | Family | Verification |
|---|---|---|
| Wiesberg Duval Isofast | Saunier | Contrasted |
| Wiesberg Duval Isomax | Saunier | Contrasted |
| Wiesberg Duval Opalia | Saunier | Contrasted |
| Wiesberg Duval Thelia | Saunier | Contrasted |
| Wiesberg Duval Thelia Twin | Saunier | 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 it 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 —. If it is not visible, do not identify the part by 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 pressure switch resolves
The pressure switch controls the air or water pressure to authorize operation. These are the typical symptoms and what to do:
Common symptoms and faults
- 01
The fan starts running and keeps spinning, but the boiler does not ignite the burner.
Cause: The pressure switch does not confirm the depression generated by the fan, and the control board does not allow ignition.
Before replacing it, check that the connection tube to the fan is not blocked, cracked, or disconnected.
- 02
The ignition fault appears intermittently, not always on the same start-up.
Cause: This pressure switch operates in a low pressure range, so small variations due to dirt or contact wear can cause intermittent faults.
Check if the fault occurs after long periods of inactivity with the boiler: it may be due to condensation accumulated in the pipe.
- 03
The boiler locks up and needs to be reset manually for it to attempt to ignite again.
Cause: If no flue is detected, the safety system interrupts the cycle and requires a reset before attempting again.
Check the condition of the flue pipe: an external obstruction can cause the same blockage without the pressure switch failing.
- 04
A distinct beep or vibration from the fan is noticeable just before the fault occurs.
Cause: The fan forces the operation trying to reach the pressure that the pressure switch needs to close the contact.
Listen for any unusual or forced sounds from the fan: if so, check the fan first before replacing the pressure switch.
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.
Wiesberg pressure switch datasheet
- Brand
- Wiesberg
- Type of part
- Pressure switches
- Units in stock
- 4 units
- Status
- Refurbished
- Warranty
- 1 year
- Shipping
- 1-2 business days
- Return
- 14 days
Data read on the part and in the manufacturer's documentation
What we have not been able to verify does not appear here.
- component code
- C6065FH1052:2
- manufacturer (marked on the part)
- Yamatake Honeywell
- contact current/voltage
- 1.5(0.5)A / 250V~
- switching pressure
- P=0.60 mbar (max. 6 mbar)
- CE code
- CE-0063AP3085/1
- contact configuration
- NC-C-NO
- batch/date
- 0008D
- manufacturing origin
- Made in Japan
- The current catalog links this part to 'Wiesberg RSSE 24'. The verified compatible models are Saunier Duval Isofast, Isomax, Opalia, Thelia, and Thelia Twin; the component code is C6065FH1052:2.
Frequently asked questions about the pressure switch
Who manufactures the Honeywell C6065FH1052:2 pressure switch for the Saunier Duval Isofast?
Is this pressure switch suitable for a Saunier Duval Thelia Twin?
At what pressure does this pressure switch detect the flue in the Saunier Duval Opalia?
What fault indicates that this pressure switch needs to be replaced in a Saunier Duval Thelia?
What is the reference for this pressure switch?
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