Carrier Furnace Flame Sensor Problem

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Carrier furnace flame sensor problem.

Answered in 3 minutes by. It is simple if you know what to do. I can help you with that. Immediately after the shut down the unit flashes a code 33 fault which is a limit or flame rollout switch in open fault.

If the furnace still doesn t heat replace the flame sensor. How do i determine the cause of the short cycling. I want to try and fix it myself. The flame sensor monitors the burner to detect whether or not a flame is present.

If the flame sensor does not detect a flame the co. I need help with carrier furnace troubleshooting. If you re carrier gas furnace is a condensing unit a high efficiency furnace it may be that the condensate pump is bad or that the trap in the condensate drain is filled with sediment. After the fan stops the fault code clears and the unit initiates the burner start sequence and runs for another few minutes and so on.

Sometimes if the flame sensor is dirty it will fail to detect a flame. Open the door panel to get access to your carrier furnace. You might also be able to see the rollout occurring. Your gas furnace flame sensoris just one part a built in safety system for your furnace.

If the furnace fires but won t stay lit the flame sensor may need to be cleaned or replaced or the furnace control board could be bad. In many cases if the furnace startup sequencegets as far as ignition then immediately shuts back off it can generally be traced to the flame sensor. You can detect a furnace flame rollout if you notice any signs of singing or discoloration on the exterior of your furnace s combustion chamber or other nearby parts. Take out the old air filter and replace it with a new one.

Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber. Try cleaning the flame sensor with a fine abrasive pad. Carrier 58ss 58gp 3 wire pilot assembly operation duration.