4055461992 Genuine Room Temperature Sensor for Electrolux Group Split System Air Conditioners, Indoor Air Thermistor

Your split system judges the room temperature through a small sensor in the indoor unit, and 4055461992 is the genuine Electrolux group replacement. It's a thermistor on a lead that measures the air drawn into the unit, so the system knows when it has reached the set temperature. No model list is on file. Match the number on your parts list, or compare the plug and lead length with your old sensor before you order.

Split system not holding the set temperature

The control board reads the room sensor constantly and speeds up, slows down or stops the compressor to suit. If the sensor drifts out of range or a wire breaks, the unit gets the wrong picture of the room. You may find it keeps running long after the room is comfortable, shuts off too early, short cycles, or shows a sensor error code on the display. A sensor's resistance can be checked with a multimeter and compared with the chart in the service manual for that unit.

Part details

• Genuine Electrolux group part 4055461992
• Room (return air) temperature sensor
• Fitted in the split system indoor unit
• No model list on file, check plug and lead length

Changing the room sensor

Turn the air conditioner off and isolate the power at the circuit breaker or isolator. The sensor usually clips to the front of the coil or a holder near the air intake, and its lead plugs into the indoor control board. Route the new lead the same way, clear of the fan, and push the plug fully home. Hard-wired units are best serviced by a licensed technician.

Questions about this part

Is the room sensor the same as the pipe sensor?

No. The room sensor reads the air coming into the unit, while the pipe or coil sensor reads the refrigerant pipe temperature. They often look alike but have different values and plugs, so order the one that matches your fault.