Your Mechanical Ventilation with Heat Recovery (MVHR) system is a cornerstone of your home’s comfort and energy efficiency.
You can’t see air, but it’s working silently in the background to ensures your living environment remains fresh (keeping condensation and mould away!).
However, like any home system, a MVHR system requires regular maintenance to function at its best. Ignoring signs of trouble can lead to increased costs, health risks, and decreased performance.
Here are some of the common signs that your MVHR system may need attention and what you can do to address them.
1. Decline in Air Quality
One of the first signs that your MVHR system might need maintenance is a noticeable decline in air quality. If your home starts to feel stuffy, the steam from the shower isn’t clearing or odours linger, vents might be the culprit. There may also be something wrong with system components like the PCB or motors.
2. Unusual Noises coming from the MVHR unit
Another indicator is unusual noises coming from the MVHR unit. Sounds like rattling, loud humming, or buzzing could point to debris inside the system, issues with the fan motor or incorrect set up of trickle and boost speeds. It’s important not to dismiss these noises, as they often signal underlying problems that could worsen if left unaddressed.
3. Condensation and Mould issues
The appearance of condensation on windows or mould in certain areas of your home is a significant warning sign. This suggests that the MVHR system isn’t moving air effectively. The system may be experiencing component/part failures, or the ducting may be compromised, causing air leakage within the system and very low performance.
4. Unit not boosting
If the boost function isn’t working and the unit is running on a single speed meaning it can't be controlled, a PCB inside the unit may have failed causing it to need replacing - sometimes lights on the system indicate the fault.
5. Error Codes
Keep an eye on the system’s control panel. If you notice error messages or frequent resets, these could be parts or software issues that require prompt attention.
Why Maintenance Matters
A MVHR system moves air 24/7. A poorly maintained MVHR system will not work effectively to keep mould and condensation away. Small issues, if neglected, can escalate into major problems, resulting in costly repairs or even the need for a replacement system. Regular maintenance extends the lifespan of your MVHR system, ensuring it serves your home efficiently for years to come.
Troubleshooting Tips for Homeowners
While some issues require professional help, there are a few steps you can take to keep your MVHR system running smoothly!
Start by checking the filters, as these often become clogged with dirt and debris. Cleaning or replacing the filters every three to six months can ensure the system can move air in and out of your home.
Check all the air valves in each room are open for extracting or supplying air.
It’s also a good idea to review the control settings on your MVHR system. Make sure it’s configured correctly for your home’s requirements and consider resetting the system if the controls seem unresponsive or erratic.
Call Professional Help is Necessary! If you’ve tried these steps and the system still isn’t working properly, and if you’re dealing with error codes, motor issues, or heat exchanger faults, it’s time to call a specialist.
Book a service Annual servicing is recommended to keep dust, debris, grease and muck off of the main components; This includes inside the unit, motors, heat exchange and in room air valves. During a service, airflow rates will be measured, controls and condensate connections will be checked and you’ll get an idea if something isn’t working correctly.
HRV’s professional servicing is essential for diagnosing complex problems and ensuring your MVHR system operates at peak performance.
If you’re unsure about your system’s performance or need expert advice, consider scheduling a professional service or call out with us at https://www.hrv-group.com/ventilation-system-servicing. A little maintenance goes a long way toward keeping your home fresh, healthy, and efficient.
You can also use the Vent Check Tool which asks a series of questions designed to pinpoint what the issue might be with your specific unit. Add the make and model and answer a series of questions to find out more.
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