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Douglas, HVAC Technician
Category: HVAC
Satisfied Customers: 3089
Experience:  Manufacture Rep for Major Brand, Technical Trainer, NATE
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Bryant 383kav error code 31. I have ran into this problem

Customer Question

Bryant 383kav error code 31. I have ran into this problem a couple of years ago. The technician had me do a "reset". I am out of town, trying to walk my wife through this. Any help...
Submitted: 7 years ago.
Category: HVAC
Expert:  Douglas replied 7 years ago.
I believe a 31 is a pressure switch fault. Turn the thermostat to off, turn the furnace off and back on... and call for heat again. She needs to listen for the venter motor to come on. If it does and it flashes the code again. she may have to walk out and check the vent pipe for a blockage of ice, snow, bird or something. If all that's ok, let me know and we'll go to the next step.
Customer: replied 7 years ago.
Code is still flashing, no apparent vent blockage...
Expert:  Douglas replied 7 years ago.
ok.... and the vent motor was running?
Customer: replied 7 years ago.

Blower starts up, runs for approx 20 seconds and then shuts off. Code 31

Expert:  Douglas replied 7 years ago.
there is a hose leading from the venting fan assembly to a pressure switch. Have her remove the tube from both and see if any water comes out of the tube. if so, blow the water out and reinstall it. reinstall it either way.