Mosaic
Well-Known Member
Hi All:
I have had to replace these items once every couple years or so.
https://www.amazon.com/Copper-Conditioner-Temperature-Sensor-Repairing/dp/B007VD31AA
The a/c companies charge about $30USD each.
This time around when the 'F8' error (LG/Westinghouse) showed up I removed the sensor and heated it to 200C with hot air. Perhaps 2 minutes was enough.
Testing with an ohmmeter showed the 'cool' resistance to be back to 5K ohms (up from 137 Ω when removed from the a/c).
So, I guess the moisture seal fails and then moisture & corrosion screws the thermistor function.
Before replacing I sanded off the green & black corrosion and coated with petroleum jelly.
15 mins work overall and it's fine again!
I have had to replace these items once every couple years or so.
https://www.amazon.com/Copper-Conditioner-Temperature-Sensor-Repairing/dp/B007VD31AA
The a/c companies charge about $30USD each.
This time around when the 'F8' error (LG/Westinghouse) showed up I removed the sensor and heated it to 200C with hot air. Perhaps 2 minutes was enough.
Testing with an ohmmeter showed the 'cool' resistance to be back to 5K ohms (up from 137 Ω when removed from the a/c).
So, I guess the moisture seal fails and then moisture & corrosion screws the thermistor function.
Before replacing I sanded off the green & black corrosion and coated with petroleum jelly.
15 mins work overall and it's fine again!
