My carrier 58sta furncace is blowing cold air constantly

there should be control board fuse usually about 3 amp that protects the transformer.

33 is a limit switch open take your furnace doors off and there should be a wiring diagram. on this furnace the blower will run if this is open. check rool out swict and linits. it sounds like you have a problem with over heating. how does the fire look ? is the vent blocked ? things like thathttp://www.scribd.com/doc/20861415/Carrier-58pav-Service-Maint i think page 9 has falt codes

Auto mode, please keep temp +5 degree than your temp.

your indoor unit is only circulating the air in the house. for your condensing unit. check your breaker in the electric panel. your contactor or your capacitor.

without replacing duct size you may damper down the airflow on the vents that have more air by closing them or taking the grill down and blocking them with an insulation type material.
Phil

Try these guys I live where they are and they have everything and they ship anywhere also. And you are right the part is only about 30 bucks I know a guy that bought one off of ebay also.


http://www.wsconet.com/HVACComRefrigeration/IgnitorsThermocouples/default.aspx

Have you checked the gas valve on the unit.. is it set to on? also check the gas valve going to the unit on?

go ahead and shut it off and back on that should reset it for you then count the number of blinks if it goes off again. then let me know

heres the manual for the unit, look at pages 46-47 and theres a trouble shooting ladder schematic that asks what the systums are then gives the solutions for the fix. if you are still having problems you can request to talk to me and I'll be more than happy to help.

http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/58st-13si.pdf

Make sure a back draft in the flue is not happening. Wind can blow it out until the flue heats up. The flame sensor may not be close enough to the burner flame. It may be weak and need to be replaced or if its an optical one it may be dirty and not see the flame very well. Its not wasting much gas but it puts extra wear and tear on the gas controls, is noisy, and, as you said, blows cold drafty air. A gas control system that has issues of any kind is not real safe. It needs to get fixed.