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The 228 error is a pressure switch calibration issue. Check to make sure there are no blockages in intake or exhaust vent and make sure all wires are connected to switch. I have seen anything from snow to a spider web create enough blockage to prevent switch from closing. Also make sure drain is clear and no water standing in hoses to or form inducer and switches.
If no blockage,I would suggest checking the vacuum on switch, but will require a vacuum tester to do so. May be best to call in a tech rather than just start replacing switches, as they will have meters and also may be able to repair under warranty
I never recommend bypassing a switch as there could be a more serious issue causing the switch to open such as a defective heat exchanger or venting issue.