What does fault code 37 mean on Saunier Duval?

The fan's number of revolutions is too low. A damaged, deformed, or obstructed blade reduces/prevents airflow, and the electronics detect insufficient rpm; visually check the blades and for any rubbing, spin by hand, and if necessary, remove the grille and nut to extract the blade and confirm that the fan is free.

What does fault code 85 mean on Saunier Duval?

Fan revolutions too low. If the impeller is broken, loose, or unbalanced, the fan does not reach the target speed and the fault is triggered; check the condition and fastening of the impeller and confirm in the technical menu that the fan rpm drops before the error.

RefurbishedSaunier Duval Extractors

Saunier Duval Fan Motor Propeller Aerothermal Equipment SDHV19 Ref. 34V9000037

Name: Saunier Duval Fan Motor Propeller Aerothermal Equipment SDHV19 Ref. 34V9000037
Brand: Saunier Duval
SKU: M+VBCSDHV19
Price: 105 EUR
Availability: OutOfStock

105 €VAT included

Extractor: reconditioned spare part that evacuates combustion gases with forced draft. Useful if it doesn't start due to draft failure, makes noise, or doesn't spin. Reference 34V9000037. Includes a one-year warranty and delivery within 2–4 working days in the EU.

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Delivery in 2–4 working days

1-year warranty

14-day return

Technical support

Key Data

Reference: 34V9000037
Brand: Saunier Duval
Type of part: Extractors
Available units: 0 units in stock
Status: Refurbished
Warranty: 1 year
Shipping: 2–4 working days (EU)
Return: 14 days

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.

Code	What does it mean?	Cause and diagnosis (this part)
37	The fan's number of revolutions is too low.	A damaged, deformed, or obstructed fan blade reduces/prevents airflow, and the electronics detect insufficient rpm; visually inspect the blades and for any rubbing, manually spin it, and if necessary, remove the grille and nut to extract the fan blade and confirm that the fan is free.
85	Fan speed too low.	If the impeller is broken, loose, or unbalanced, the fan does not reach the target speed and the fault is triggered; check the condition and fastening of the impeller and confirm in the technical menu that the fan's rpm drop before the error.

Saunier Duval Fan Motor Propeller Aerothermal Equipment SDHV19 Ref. 34V9000037

Key Data

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