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Re: upsidedownFE not working thermal error
Thermistor problems are really very rare. One thing to look for is a possible broken wire in the door assembly. Remove the front door panel. Locate the wire harness. About 1/3 of the way up from the bottom of the door, look for a broken wire. If no broken wire, look for a kinked wire that may be on the way to being broken. Once all the broken wires are repaired, the unit should work fine. If there is no broken wire, then have the thermistor replaced.
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see the following steps , use the VOM and fix it. God bless you
Check the power diodeThis
electronic component is responsible for transmitting current in one
direction. If the diode becomes defective it will cause your microwave
to not heat. Test the diode and replace it if necessary.
High voltage capacitorResponsible
for storing electricity, this part is a key component in any microwave.
Remove, discharge, and test the capacitor to determine if it requires
for generating waves and producing heat. When your microwave is no
longer heating properly, replacement will be required.
the thermal cutoffs on both the magnetron and the oven itself. Take off
one of the leads and using a volt-ohm meter on RX1, check the terminals.
If you get a result other than zero, replace the thermal cutoffs.
Motor Control Unit (MCU)
Heat Sink Thermal Trip
If the thermal protector on the MCU heat sink gets too hot, it will open
the thermal protector on the heat sink which will stop motor functions
and an “F/10” will be displayed.
1. Check for proper installation, verify the unit is not located
near a source of heat and has proper ventilation.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the MCU, the motor,
and Central Control Unit (CCU).
4. Check the drive system for any worn or failed components.
5. Plug in washer or reconnect power.
6. Check the MCU by looking for operations of the drive motor.
7. Check the drive motor for powered rotations.
The meaning of the H4 code is a fuser warm up failure. This means that the fuser is not coming up to temperature as it should within a certain amount of time. This code comes up occaisionally on the AL series for some reason. The fuser unit in cose you don't know is the part that gets hot and is located right where the paper exits the machine. If the code does NOT reset then the part most common to fail is either the thermal fuse or the heater lamp itself.
It all depends on how often the code comes up. Make sure that the machine is not to "cold" at start up. Install a power filter between to the copier and the power outlet to make sure your not getting any line noise that could cause the flase errors. That is about it.
Fixing unit error. Fixing lamp not coming on or thermal fuse open. Press *, 2 and 8, * , to enter service mode copier>function>clear>err>ok power off/on If the error returns, troubleshoot fixing lamps, thermal fuse, thermistor.
HI...IT COULD BE A BAD THERMAL FUSE NEAR THE OUTPUTS ....OR A COMPONENT HEATING UP TRIPPING THE THERMAL FUSE TO SHUT DOWN... OPEN IT UP SEE IF THE OUTPUTS ARE GETTING REALLY HOT.. IF IT IS NOT GETTING REALLY HOT... USE A JUMPER WIRE TO JUMP OUT THE THERMAL FUSE IF IT COMES RIGHT BACK ON.. GET A NEW THERMAL FUSE DON'T KEEP THE JUMPER ON (USE FOR TEST ONLY) GOOD LUCK