Carrier infinity furnace 2010 has stuck inducer pressure switch, Can I manually bypass and heat the house until serviceman arrives tomorrow?

possibly a board issue does inducer shut off when no call for heat

Could be several causes.
1. Blockage on piping
2. Water in inducer housing slowing down inducer impeller
3. Condensate trap for furnace clogged up.
4. Inducer motor going bad.
5. Leak in vacuum hoses or not connected.
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since there is no model number to go by, let's go generic. Most inducer motors have some way of "proving" it is running to the control board. It may have a centrifugal switch in it or it may have use some type of air pressure switch. The centrifugal switch will usually have 2 wires other than the power wires and most of the time, go to the rear of the motor. The air switch usually has a small rubber hose that pushes onto it and is connected to the fan housing.

Does it sound like water splashing in the blower housing? If the fan does not come up to speed, it won't make the pressure switch.

Sequence of events: call for heat at T-stat, inducer motor turns on, negative pressure created in heat exchanger closes pressure switch, pressure switch control wire runs through all safety's (these must all be in closed/safe position) if ok then glow plug lights. Time delay then gas valve opens, flame verified by "flame rod" t-stat = :)

YOUR FURNACE IS IN LOCKOUT MODE DUE TO A SAFETY FEATURE OF UNIT. USUALLY THE HIGH LIMIT HAS BEEN TRIPPED, OR YOU PRESSURE SWITCH FROM DRAFT INDUCER MOTOR FAULTY OR PLUGGED. IT WILL CONTINUE LOCKOUT MODE UNTIL THIS IS FIXED.

The limit switch on the inducer has tripped. There are two wires that go to a small disk about the size of dime that has a small button in the center. Push this little button and you will feel a littl snap and the unit should fire up. Check all the manual reset limits as well. If the unit still won't start, jump the two wires by bypassing the limit switch. If it starts, then replace the switch. Bypassing the switch is only temporary and could lead to death if it is used as a permenant fix.

The inducer motor is what takes the cabonmonoxide out of the house from the unit and should not be bypassed

code 31 indicates pressure switch did not close or reopened during the heat cycle....1st thing to check is the inducer motor,,this is a small motor that turns a small blower wheel that draws the exhaust gases through the furnace and blows them into the vent pipe....1st locate the inducer assembly,,most easily identified by the small plastic fan blade that cools the inducer motor as it runs..1st turn off tstat and turn off furnace power switch..then turn on furnace switch,then set tstat to heat,set the temp above room temp by 5 degrees...remove the furnace front cover,locate the inducer motor,,if it isnt turning,but is warm or hot after a minute or so,likely the inducer motor is bad..if it isnt turning and isnt warm after 1 minute,then likely the main control board is bad,,not turning the inducer motor when it should,,,,,if the inducer motor is running,,then the pressure switch isnt closing,, could be a bad pressure switch but more likely there is a problem with the venting...some possible problems that would cause the pressure switch not to close in an 80% eff furnace [metal vent pipe] are: [1] a blockage in the vent pipe,base of chimney,dead bird at the furnace where vent connects to furnace or down inside the inducer assy,accessed by removing vent pipe from furnace....if all clear the chimney could be blocked up inside,,is the draft good when vent is removed from base of chimney?..if furnace is a 90%+ type [pvc plastic vent pipe],,then check the intake pipe at the furnace by removing it where it attaches to top of furnace..is the intake clogged with anything?..then check the intake and exhaust pipes outside for blockages,,including ice/frost/snow at the exhaust pipe outlet..