Carrier Furnace Flame Sensor Problem

Open the door panel to get access to your carrier furnace.

Carrier furnace flame sensor problem.

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. The flame sensor monitors the burner to detect whether or not a flame is present. Answered in 3 minutes by.

If the flame sensor is defective it might fail to detect a flame. Usually found where the cold air enters the unit either in the cold air return duct or the entrance to the blower chamber. I need help with carrier furnace troubleshooting. Locate the current filter.

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. Ntrol board will shut off voltage to the gas valve to prevent the furnace from heating. How do i determine the cause of the short cycling. If the furnace still doesn t heat replace the flame sensor.

Take out the old air filter and replace it with a new one. 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. Your gas furnace flame sensoris just one part a built in safety system for your furnace. 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.

It is simple if you know what to do. If the flame sensor does not detect a flame the co. I can help you with that. 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.

Immediately after the shut down the unit flashes a code 33 fault which is a limit or flame rollout switch in open fault. Try cleaning the flame sensor with a fine abrasive pad. You might also be able to see the rollout occurring.