What does code 33 mean in Renova?

Name: Expansion Vessel Renova Micra 2 24E REF. 77002563
Brand: Renova
SKU: VERM224E
Price: 35 EUR
Availability: InStock

Control cycle: the air pressure switch does not switch. The flue differential pressure switch does not close when the fan starts; check with a manometer/ohmmeter the switching of the pressure switch and ensure there are no obstructions/water in the inlets and flue duct.

RefurbishedRenova Expansion vessels

Expansion Vessel Renova Micra 2 24E REF. 77002563

35 €VAT includedIn stock · 5 units

Expansion vessel: reconditioned spare part that absorbs the expansion of water when heated. Useful if the pressure rises significantly when heating or if the safety valve is triggered. Reference 77002563. 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: 77002563
Brand: Renova
Type of part: Expansion vessels
Available units: 5 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)
33	Control cycle: the air pressure switch does not switch.	The differential pressure switch for fumes does not close when the fan starts; check with a manometer/ohmmeter the switching of the pressure switch and ensure there are no obstructions/water in the inlets and flue duct.

Expansion Vessel Renova Micra 2 24E REF. 77002563

Key Data

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