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Why is my HRV not blowing air?

If your HRV (Heat Recovery Ventilator) is not blowing air, it could be due to a variety of reasons. The most common causes include a blocked air filter, a malfunctioning fan, or a problem with the HRV's control system. In this article, we'll explore the potential reasons why your HRV may not be blowing air and provide some troubleshooting steps to help you resolve the issue.


Blocked Air Filter


One of the most common reasons for an HRV not blowing air is a blocked or dirty air filter. The air filter in an HRV is responsible for trapping dust, pollen, and other airborne particles, preventing them from entering the ventilation system. Over time, the filter can become clogged, restricting airflow and causing the HRV to operate less efficiently. To fix this issue, you should check the air filter and clean or replace it if necessary. Refer to the manufacturer's instructions for the proper filter maintenance and replacement schedule.


Malfunctioning Fan


Another potential cause of an HRV not blowing air is a problem with the fan. The HRV's fan is responsible for circulating the air through the system, and if it's not working correctly, the airflow will be disrupted. This could be due to a faulty fan motor, a problem with the fan's bearings, or a blockage in the fan's housing. If you suspect a fan issue, you may need to have a professional technician inspect and repair the HRV.


Control System Issues


The HRV's control system, which includes the thermostat, sensors, and control board, plays a crucial role in regulating the airflow. If there's an issue with the control system, it could prevent the HRV from properly activating the fan and blowing air. This could be caused by a malfunctioning component, a wiring problem, or a programming error. If you suspect a control system issue, you may need to have a professional technician diagnose and repair the problem.


Troubleshooting Steps



  • Check the air filter and clean or replace it if necessary.

  • Inspect the fan for any signs of damage or blockage, and have a professional technician repair or replace it if needed.

  • Verify that the HRV's control system is functioning correctly, and have a technician diagnose and repair any issues.

  • Ensure that the HRV is receiving power and that the circuit breaker has not tripped.

  • Check for any obstructions in the ductwork or air vents that could be restricting airflow.


If you've followed these troubleshooting steps and your HRV is still not blowing air, it's best to contact a professional HVAC technician who can thoroughly inspect the system and identify the root cause of the problem.

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If you are experiencing little to no air coming through your vents, it's more likely due to other factors such as duct obstructions or fan issues. If you suspect an issue with your refrigerant levels, consult an HVAC professional to replenish them to the manufacturer's specifications of your unit.



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So you want to hold it down until you get the o2 in the roof. Now the next step is to press the up button to increase this o2 in the roof. To 22. Now the next step is to press the power button.



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If your AC is on but not blowing air, check the thermostat settings first. A clogged air filter may also block airflow and needs replacing. The blower motor could be malfunctioning, or ductwork might be disconnected or blocked, affecting air circulation throughout your home.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.