Carrier furnace error codes

Carrier is a manufacturer of furnaces and other home appliances. Most Carrier furnaces are feature sealed combustion devices, automatic ignition, and elements, which ensure low noise, and an electronic display panel. Although these systems are highly advanced and last long when due maintenance is provided, they cannot be 100% secure against breakdowns. Once something goes wrong in a furnace, a fault code appears on the display. These codes address particular systems and components, so that owners know where to look for a solution.

There are six steps you can take to fix the problem:

  1. If you see “22” on the display, check the gas valve ffor leaks. Wipe it with a piece of soft and clean cloth and fully release it. If there is a smell of gas, turn off and disconnect the furnace and contact your gas and/or fire fighting service.
  2. If you see “23” or “33”, please, check the pressure switch on the control panel. Stop and disconnect the furnace from the mains. If the switch is stuck, clean it. Make sure the vents are not blocked. Reduce drafts and check the tubing. Remove blockages, if any.
  3. If you see “33” on the display, check the furnace’s vents for blockages. Remove them, if any. If the code is still there, check the blower wheel (it could have gone loose) and/or the blower motor. Use professional help, if needed.
  4. If there is the “34” error code, and the gas valve is on, there is an ignition failure. Call Carrier and use professional help. Most likely, the ignitor has gotten oxidated, gas pressure in the system has dropped, or the gas valve and/or ifnition system needs to be repaired or replaced.
  5. The “45” error code signals a control circuitry lockout. Reset the furnace by turning it off for a few minutes. Turn it back on again. If the error code appears again, contact Carrier for professional help.
  6. If you see error codes other than these, please, contact Carrier. Most of them require professional technical support.