Vaillant Automatic De-aerator - 104521
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eBayVAILLANT 104521 ECOTEC PLUS VUW 824 831 837 & 937 AUTO AIR VENT - NEW
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OnBuy.comVaillant 104521 Automatic De-Aerator (Aav) Genuine Part *New* 4024074452547
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Product Information
Full details
This guide is for owners of Vaillant ecoTEC exclusive 832 boilers who need to replace or maintain their automatic air vent. The key benefit is ensuring efficient and quiet operation by automatically removing air from your heating system. A caveat is that installation should ideally be performed by a qualified heating engineer. This genuine Vaillant part, MPN 104521, functions as an automatic de-aerator, crucial for preventing airlocks and improving system performance.
All features
| Model Part Number | 104521 |
|---|---|
| Brand | Vaillant |
Extended Product Information
FAQs
How do I know if my Vaillant Automatic De-aerator needs replacing?
Signs include persistent gurgling or knocking noises from the boiler or pipework, radiators not heating evenly (cold spots), and a noticeable decrease in heating efficiency. A qualified engineer can diagnose if the de-aerator is faulty.
Can I replace the de-aerator myself?
It is strongly recommended that this part is installed by a Gas Safe registered engineer. Incorrect installation can lead to leaks, system damage, or safety hazards.
What is the warranty period for this part?
All new parts, including this Vaillant Automatic De-aerator, come with a 12-month warranty from the date of purchase.
Which Vaillant boiler models is this part compatible with?
This specific part, 104521, is listed as fitting the VAILLANT ecoTEC exclusive 832. Always double-check your boiler's model number and consult your manual or a professional for confirmation.
Does this part come with any installation fittings?
The product is the de-aerator unit itself. Installation fittings such as seals or connecting pipes are typically required separately or may be part of the original boiler fitting, depending on the installation method. It is best to confirm with the supplier or your engineer.
How often should the de-aerator be checked?
The de-aerator functions automatically. However, it's good practice to have your boiler serviced annually by a qualified engineer, who will check the de-aerator and the overall system health.
Troubleshooting
Boiler still making gurgling noises after replacement
Ensure the system was properly refilled and all air was bled from the radiators and pipework. Check for any other potential air ingress points or leaks in the system.
Small leak from the de-aerator connection
The fitting may not be tight enough or the seal may be damaged. Ensure it is securely fitted and the seal is correctly seated. If the leak persists, the part may need to be replaced.
Heating system pressure is dropping rapidly
A consistently dropping pressure could indicate a leak. Check the de-aerator connection and other system components for leaks. If no obvious leaks are found, consult a heating engineer.
Radiators not heating up fully
While the de-aerator removes air, persistent cold spots may indicate other issues like sludge, blockages, or pump problems. Ensure the de-aerator is correctly installed and functioning, then address other potential causes.
Pros and Cons
Pros
- Ensures optimal boiler performance by removing air.
- Genuine part guarantees perfect fit and function.
- Helps prevent noisy operation caused by air in the system.
- Comes with a 12-month warranty for added security.
- Designed for specific Vaillant models for reliable integration.
Cons
- Requires professional installation for safety and optimal function.
- Specific to certain Vaillant boiler models, not universally compatible.
- Replacement may require draining and refilling the heating system.
- Potential for leaks if not installed correctly.
Setup, Compatibility & Care
Compatibility: This Automatic De-aerator, part number 104521, is specifically designed for the VAILLANT ecoTEC exclusive 832 boiler model. Always verify your boiler's manual or consult a professional to confirm compatibility before purchase.
Setup: Installation of this part should be performed by a qualified Gas Safe registered engineer. The process typically involves:
- Isolating the boiler and heating system from the power and gas supply.
- Draining down the heating system to a safe level.
- Carefully removing the old de-aerator.
- Installing the new Vaillant Automatic De-aerator, ensuring all seals are correctly seated.
- Refilling and repressurizing the heating system.
- Bleeding radiators and the system to remove any introduced air.
- Restoring power and gas supply and testing the boiler for correct operation.
Care: As an automatic component, this de-aerator requires minimal direct user care. However, regular system maintenance by a qualified engineer is recommended. This includes checking for leaks around the de-aerator and ensuring the system is properly functioning. Over time, internal components can degrade, necessitating replacement. There are no user-serviceable parts within the de-aerator itself.