Bryant furnace throwing code 31 .. My furnace is throwing code 31 "pressure switch did not close or reopened" (three quick flashed followed by one long flash).. Pressure switch codes typically mean any of the following. Something in the vent or fresh air intake. Check to see if any ice built up on the outside venting.. Bryant Code 31. Jump to Latest 35K views 17 replies 6 participants last post by markebenson Jan 5, 2011. W. wrfregm Discussion starter. 4 posts · Joined 2006 Add to quote; Only show this user #1 · Dec 27, 2006 (Edited.
Causes of Bryant Furnace Code 31. The primary causes of Bryant Furnace Code 31 revolve around airflow, pressure, and ignition issues. Here are the common culprits: 1. Clogged or Dirty Air Filter. One of the most frequent causes of Bryant Furnace Code 31 is a clogged air filter. The air filter plays a crucial role in maintaining airflow within.. Several factors can lead to the pressure switch's issues: Clogged Air Filter: A neglected air filter restricts airflow, causing the exhaust pressure to plummet like a deflated balloon. Flue Pipe Philharmonic: Obstructions like bird nests, animal debris, or excessive frost buildup can impede the exhaust flow, leading to pressure imbalances. Pressure Switch Blues: The switch itself could.