Review on Optimize Power Efficiency with Ametherm Thermistor Inrush Current Limiter by Justin Hollins

Although the heater stage is on, it is most likely a burned out (damaged) inrush current limiter ie NTC thermistor in the ECM (Electronic Control Module) The ECM is connected to the variable speed fan motor. I'm the first timer. To remove the ECM you remove the entire fan assembly which wasn't as strong as I thought it would be. Carefully remove the two wiring harness connectors that are attached to the ECM. Then remove the main circuit board and the door security switch. In my case, all I had to do was remove the two wires that connect to the sensor that is attached to the fan unit housing inside the oven body. All other wires and corresponding harnesses connected to the motherboard were left in place. Once these two pieces have been removed from the stove body and placed neatly to the side, a space is created to gain access to the main blower box housing. There are two screws on the top where the fan body attaches to the oven frame. Place a solid object under the blower body so that it fits snugly in the small hole. This means that the fan housing does not fall down immediately after loosening the two bolts. Remove these two screws at the top where the blower housing is attached. Pull out the fan housing. You must wait 5 to 10 minutes before unplugging the ECM from the engine case to allow current to discharge to avoid electric shock. Then remove the two long screws from the ECM that is attached to the engine and mounted in the fan assembly. After the ECM is removed, unscrew the green circuit board from the ECM. Check the circuit board for a disc-sized chunk, about the size of a round coin called a "thermistor" that could be burned or fried. This damaged thermistor must be desoldered and replaced with an Ametherm SL32 1R030 thermistor. SG348 - Inrush Current Limiter 1 Ohm, 16A, 48J Ametherm SL32 1R030 - Inrush Current Limiter 1 Ohm, 30A, 160J SL32 1R030 meets or exceeds SG348 specifications. According to Ametherm, the SL32 1R030 is an acceptable replacement for the SG348. I have confirmed this to the Ametherm engineer. Total repair cost was $30 ($10 for parts + $20 for a new soldering iron kit) compared to $500 to $1000+ at local HVAC companies who would replace just the ECM or the entire fan motor. In general, it took 3 hours to disassemble, repair and reinstall the main compressor unit. This was my first attempt at the repair work described above and the oven is now fully functional. I'm sure professionals can do this repair in 1-2 hours. BTW, my XV80 oven is over 18 years old and this is the first time this part has failed. Only attempt this type of work if you know how and at your own risk. I am not responsible for what is written in this review. This is for reference only….