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Support Center
 
 

ERV/HRV Trouble Shooting

 
  1. My drain pan is plugged.
  2. There is water in the bottom of my unit.
  3. There is ice build-up on the outside duct.
  4. Humidity levels are too high.
  5. My dehumidistat is not working.
  6. It feels like the air flow is poor / weak.
 
 

My drain pan is plugged.

Check for obstructions near the drain and remove. Also check for kinks in the water line. Straighten line if needed.
 
 

There is water in the bottom of my unit.

This could be caused because:
  • The HRV may not be level. If it is not level, make necessary adjustments.
  • Drain lines are plugged. If you find obstructions or kinks in the line, remove obstruction or straighten the water line.
  • The HRV heat exchanger core may be installed improperly. Contact your local contractor to ensure proper installation.

There is ice build-up on the outside duct.

Contact your local contractor to ensure the vapor barrier is correctly installed, sealed and insulated and that all joints are properly taped.  Note that minimal build-up is expected on cores before the unit initiates defrost function.
 

Humidity levels are too high.

Have you forgotten to set the dehumidistat? Or do you simply need to make an adjustment to the setting? You may also contact your local contractor to ensure the air flow is properly balanced.
 
 

My dehumidistat is not working.

You may want to check the wiring for a short. You may also want to check the wiring in the wall switch and at the HRV/ERV to ensure it is correctly connected.
 

It feels like the air flow is poor / weak.

Check the following:
  1. The ERV/HRV is correctly balanced.
  2. The filters are clean. Check your filters once every 3 months. You may or may not want to clean them depending on what you find. Clean if needed.
  3. The exterior hood is clean and free of debris. If you find leaves, twigs or grass obstructing the hood, remove them. Clean further if needed.
  4. The grills may be closed (open them).
  5. The duct might be the wrong size. (Your contractor will know.)  
  6. Your duct may be punctured. If the puncture is small, tape over the puncture with tape recommended by your contractor to re-seal the duct. If the puncture is quite large you many want to contact your local contractor to help.
  7. The ERV/HRV is too small for your home.
  8. The power supply may be inadequate.  Have your local contractor check the power supply.
  9. The ERV/HRV is on.
  10. Call your local contractor to service your unit once per year to ensure maximum performance and life of your unit.