I have a Carrier furnace that displays error code '33'. Carrier only provides the answer to service personnel. What does this code mean as my furnace keeps going out?
-sincerely, getting cold.

Look on the back of the furnace blower door. There is a drawing there with the codes listed. Since you did not take the time to post the model number of your unit I used my crystal ball to find what 33 means for you.

33 LIMIT CIRCUIT FAULT - Indicates a limit, or flame rollout is open. Blower will
run for 4 minutes or until open switch remakes whichever is longer. If open
longer than 3 minutes, code changes to lockout #13. If open less than 3 minutes
status code #33 continues to flash until blower shuts off. Flame rollout switch
requires manual reset. Check for: - Restricted vent
- Proper vent sizing - Loose blower wheel - Excessive wind
- Dirty filter or restricted duct system.
- Defective blower motor or capacitor. - Defective switch or connections.
- Inadequate combustion air supply (Flame Roll-out Switch open).

You can try to resaet power THEN push the little reset buttion. Here is a generic manual for Carrier

http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/58mxa-9sm.pdf

You might have to call for On Site professional service since according to the diagram it could be multiple items in the failure.