Date: 25/03/2019
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Lance Waterbarger's Fall Maintenance Secrets - Condensate Drainage

Nashville Interstate AC Service's technician, Lance Waterbarger, reveals two secrets as he completes a fall maintenance check on an 11-year-old York HVAC dual-fuel furnace in the basement of a customer's home. The unit is high efficiency and uses a heat pump and a gas furnace. 


1. Check the condensate pump

Water that condenses during the operation of a heat pump or furnace needs to be pumped away, into a drain line.  The higher the efficiency of the unit, the more water will need to be pumped.  Check the pump to make sure it is working.  Make sure you have clean water and a clean reservoir in the pump.  If it is dirty, disassemble it and clean it.  Bacteria and algae can build up and prevent the condensate from draining.

2. Check the condensate drain line

Check to see where the condensate drain line goes.  The drain will freeze up if it goes out a window or is exposed in unprotected space.  If the line freezes, the water cannot drain out and the pump will back up and shut your unit off.  If your furnace quits during freezing weather, pipes in the house could freeze, causing them to burst, resulting in extensive water damage to your home.