Furnace Exhaust Fan Full Of Water

Condensation from air conditioning coils contains bacteria that can form slime and clog the condensate pan drain tube.

Furnace exhaust fan full of water.

If there is water in the blower box contact a professional repairman to replace the blower box and silver bladder. If you have a condensation leak with a standard efficiency then its exhaust or flue pipe may be incorrectly sized. Water may accumulate due to a broken silver bladder or faulty insulation. The fan assist is meant to help with the natural draft not pressurizing the exhaust pipe with a power vent fan found in condensing furnaces and discussed below.

Slope the drain line itself obviously. As the exhaust gases cool down during the primary and secondary heat extraction water usually condenses and flows out of the furnace. Look inside of the blower box for water accumulation. Water in condensing gas furnaces condensing furnaces also known as high efficiency furnaces are generally in the 90 to 97 efficiency range.

Avoid double trapping and vent the drain after the trap to prevent airlocks. There should be no water involved with a standard efficiency furnace. When you see water puddling around the furnace with the a c running you have a clogged condensate drain tube. You can prevent slime and eliminate drain tube clogs in two easy steps.

Most furnaces will have at least 2 internal drains typically one for the heat exchanger and one for the vent usually at the inducer outlet or on the inducer housing the secondary heat exchanger outlet is sealed inside a plastic part called the collector box which is designed to collect the condensate and drain it out if the seal gets damaged the water will fill the inducer. Look in your install manual most manufacturers will call for the furnace to be installed with a slight forward pitch to allow condensate to drain from the heat exchanger.