2 Port Motorised Valve Problems

2-Port Motorised Valve Problems and Solutions

Central heating systems are an essential component of modern homes, providing warmth and comfort during cold months. However, like all mechanical systems, they are prone to occasional hiccups. One such problem relates to the 2-port motorised valve, a vital component that can experience issues over time. In this article, we will delve into the common issues associated with the 2-port motorised valve and provide potential solutions to these problems.

The Problem

A common issue with the 2-port motorised valve, particularly the Lifestyle model, is that it tends to stick. This can result in the central heating pump running continuously. In some instances, tapping the valve may temporarily resolve the issue. Some users have also reported success with spraying lubricants like WD40, though this is often a short-term solution.

Potential Solutions

1. Lubrication: Check the shaft of the valve. If it appears stiff, you can lubricate it. It’s important to use the right kind of lubricant – silicone-based oils or WD40 are recommended. Avoid using mineral oils as they may cause further issues.
2. Head/Motor Replacement: Depending on the model and its age, it might be possible to replace the head or motor of the valve. Some models have a button at the base of the head which, when pressed, allows the head to be removed. If your model doesn’t have this feature, the motor might be held in place with screws. In such cases, unscrewing and lubricating or replacing the shaft may resolve the issue.
3. Inspecting the Microswitch: Some valves have a microswitch mechanism that can become sticky over time. If you can access this switch (by removing the plastic cover off the actuator, for example), it might be possible to clean or replace it. Ensure you isolate the system before attempting this. Cleaning agents like contact cleaner or WD40 can be used to clean these switches.
4. Replacement: If the valve is particularly old or frequently malfunctions, it might be time to consider a full replacement. There are replacements available online, though it’s crucial to ensure you’re purchasing from a reputable supplier. If considering a replacement, be aware that draining the system might be required. If you’re unsure about this process, it might be wise to hire a professional to handle the replacement.
5. Contact Cleaner for Sealed Switches: In cases where the micro-switch’s contacts are sealed inside, an aerosol solvent contact cleaner can be used. This solvent can penetrate the casing and clean the switch internals.

Conclusion

While the 2-port motorised valve is a durable component, like all parts of a central heating system, it’s prone to wear and tear. Regular maintenance and timely interventions can ensure the longevity of the valve and the overall efficiency of your heating system. If in doubt, always consider consulting with a heating specialist or tradesperson to ensure your system runs smoothly.