Water Pressure Switch Saunier Duval Hermann Thema NOx F 24 Ref. H049005816
RefurbishedSaunier DuvalPressure switches

Water Pressure Switch Saunier Duval Hermann Thema NOx F 24 Ref. H049005816

15 €VAT includedIn stock · 1 unit

Pressure switch: refurbished spare part that controls air or water pressure to authorize operation. Useful if the boiler does not start or shows a draft error. Compatible with Habitat 2 23 e, Habitat 2 24 SE, Habitat 2 28 SE (ref. H049005816). Includes a one-year warranty and delivery within 2–4 working days in the EU.

1
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Delivery in 2–4 working days
1-year warranty
14-day return
Technical support

Key Data

Reference
H049005816
Brand
Saunier Duval
Type of part
Pressure switches
Available units
1 unit in stock
Status
Refurbished
Warranty
1 year
Shipping
2–4 working days (EU)
Return
14 days

The same part (ref. H049005816) equips these models. Verified compatibility; check the reference before purchasing.

Hermann Habitat 2

  • Habitat 2 23 e
  • Habitat 2 24 SE
  • Habitat 2 28 SE

Hermann Master

  • Master 23 e
  • Master 24 SE
  • Master 30 SE
  • Master 321 SE
  • Master Cond 26
  • Master Cond 32

Hermann Micra 2

  • Micra 2 23 e
  • Micra 2 24 SB SE

Hermann Micra Condensing

  • Micra Condensing 26
  • Micra Condensing 26 SB
  • Micra Alta Efficienza 24

Fault codes related to this part (not the entire boiler). They usually have more possible causes: first rule out electrodes, wiring/connections, and gas supply. Verified with ≥3 sources.

CodeWhat does it mean?Cause and diagnosis (this part)
09Water pressure detector/pressure switch fault.The pressure switch/sensor does not deliver a valid signal (open or short-circuited) and the PCB detects the fault; check the continuity/signal of the pressure switch and compare with the actual pressure using a manometer.
F.73Water pressure sensor fault (interruption/short circuit).The signal from the pressure switch/sensor is out of service (open, grounded, or shorted), so the boiler does not read valid pressure; check the wiring and the sensor signal against the measured pressure.
F.74Water pressure sensor signal out of range (too high/low depending on model).The pressure switch/sensor delivers voltage out of range (short circuit to 5V/24V or internal fault); check the sensor's output voltage and wiring and compare with the actual pressure.
F.75Pump error/lack of water: the pressure sensor does not detect an increase when the pump starts.Due to a faulty pressure switch/sensor or lack of pump flow, the reading does not change at the start; check pressure variation at startup with a manometer and sensor signal, as well as bleed/pump condition.
How do I know if this pressure switch is for my boiler?
Verify the reference H049005816 printed and ensure your model is on the list of compatible ones; also compare the connections with the original part.
What is it used for?
The pressure switch controls the pressure/draught (of air in sealed systems) or water to authorize operation.
Is the boiler not starting or showing a draught fault?
If the fan spins but does not ignite, check the pressure tubes (loose/blocked), the diaphragm, and the fan.
Which models is it suitable for?
Part shared by various models (see Compatibility). If your model does not appear, send us a photo of the marking and we will confirm it.
Installation and recommendations
Check the tightness of the pressure pipes and the switching of the contact.
What does refurbished mean and what coverage does it have?
Part removed from a boiler out of service, inspected and tested. Includes 1-year warranty and 14-day return policy. Delivery within 2–4 working days in the EU.

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