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Most likely is the temperature sending unit/sensor. Nobody ever thinks about how it works. When engine is started, and cold, the temp sensor tells the computer to put the engine into cold start mode, putting more fuel into the engine and to a bit higher idle. Once it warms up to operating temp, said sensor tells the computer to turn off cold start mode and it stops dumping excess fuel in. If the sensor puts it in cold start mode, malfunctions and doesn't take it off cold start mode, it's still dumping excess fuel in and flooding the engine. Sometimes a re-start will reset the computer, but not always. Makes sense now, doesn't it. Find the temp sensor and replace it like you did all the others.
E000 fixing overheating E001 fixing assembly overheating E002 fixing assembly low temperature E003 post-standby fixing low temperature E007 fixing film rotation error E010 main motor rotation error E014 fixing motor rotation error E019 waste toner case full, waste toner case full sensor error E020 toner clogging between sub hopper and developing assembly E024 developing assembly connector disconnection E025 hopper motor, bottle motor error E032 NE controller counter error E064 power supply voltage error (high-voltage) E100 BD interval error E110 scanner motor error E191 communication error for high voltage power supply E202 CIS home position detection error E225 CIS light intensity error E227 reader unit power supply error E248 backup memory error E261 zero-cross signal error E315 image data error E400 feeder communication error E490 wrong DF type E500 finisher communication error E503 finisher internal communication error E505 finisher backup memory error E514 stack delivery/trailing edge assist motor error E519 gear change motor error E520 off-set motor error E530 rear alignment error E531 stapling error E532 stapler shift error E535 swing error E537 front alignment error E540 stack tray ascent error/upper tray ascent error E542 lower tray ascent error E577 paddle error E584 shutter error E590 punching error E591 puncher dust sensor error E592 punch horizontal registration sensor error E593 punch shift error E5F0 saddle paper positioning error E5F1 saddle paper folding error E5F2 saddle guide error E5F3 saddle alignment error E5F4 saddle rear stapling error E5F5 saddle front stapling error E5F6 saddle butting error E5F8 saddle connector error E5F9 saddle switch error E602 hard disk error E604 image memory error/shortage E609 hard disk error E610 herd disk coding key fault E674 fax board communication error E710 IPC initialization error E711 IPC communication error E713 communication error for finisher E716 communication error for pedestal/ communication error for 3-way unitA1 E717 communication error for NE controller E719 coin vendor error E730 PDL software error E732 scanner communication error E733 printer communication error E740 Ether board error E743 DDI communication error E744 language file/boot ROM error E745 TokenRing board error E746 accessories board wrong model error E748 controller board and SDRAM size mismatch E805 fan error
Regarding most common errors related to fixing section:
E000 The temperature of the fixing assembly is abnormally high. 0001 While startup control is under way, the reading of the main thermistor is less than 30 deg C continuously for 200 msec or more 1 sec after the start of power supply. While startup control is under way, the reading of the main thermistor is less than 70 deg C continuously for 200 msec or more 2 sec after the start of power supply. While startup control is under way, the reading of the main thermistor is less than 120 deg C continuously for 200 msec 6 sec after the start of power supply. The startup control does not end 30 sec after the start of power supply. Reset the condition in service mode: COPIER>FUNCTION>CLEAR>ERR. Replace the main thermistor. Replace the DC controller PCB
E001 The temperature of the fixing assembly is abnormally high. 0000 The reading of the main thermistor is 250 deg C or more continuously for 200 msec. 0001 The hardware circuit detects overheating of the main or sub thermistor for 200 msec. 0001 The hardware circuit detects overheating of the main or sub thermistor for 200 msec.
Reset the condition in service mode: COPIER>FUNCTION>CLEAR>ERR. Replace the main thermistor. Replace the DC controller PCB
E002 The rise in temperature of the fixing assembly is faulty. 0000 While startup control is under way, the reading of the main thermistor is less than 115 deg C continuously for 400 msec 1.3 sec after it has indicated 100 deg C. While startup control is under way, the reading of the main thermistor is less than 150 deg C continuously for 400 msec 1.3 sec after it has indicated 140 deg C. Reset the condition in service mode: COPIER>FUNCTION>CLEAR>ERR. Replace the main thermistor. Replace the DC controller PCB
E003 The fixing temperature is too low after a standby state. 0000 While regular temperature control is under way, the reading of the main thermistor is less than 140 deg C continuously for 400 msec or more. Reset the condition in service mode: COPIER>FUNCTION>CLEAR>ERR. Replace the main thermistor. Replace the DC controller PCB
E007 The rotation of the fixing film is faulty. 0000 While the fixing motor is rotating, the marker signal is not detected for 6 sec with the reading of the main thermistor indicating 100 deg C or more. Reset the condition in service mode: COPIER>FUNCTION>CLEAR>ERR. Replace the main thermistor. Replace the DC controller PCB REPLACE FIXING FILM ASSY(HEATER)
You are not alone. We have the same problem. Unit worked fine for 2-3 years. We still have the manual. This is not a user error- we know how to use it. The sensor switch is fine- it would not power on without that working ok.
The red power light comes on, and when we turn it ON it says "200" for about 2-3 seconds... then "Err". Nothing is possible after that, the unit has to be powered off.
We can push Temp Mode and start setting the temp higher but after 2 seconds it just goes to Err. It does not matter what buttons you push- you don't have to push anything at all and it says "Err". Reset button does nothing- this is not a heat temp overload issue. This unit worked at Thanksgiving, and then not at Christmas! We tried powering it on 10-20 times... nothing. Then the next day as we were about to put the turkey in the oven I tried the fryer again... and presto it worked fine!!! Now today it does not work again. Tried it 10 times, no go. Unit was stored in pantry (in house) so it is not a cold/warmup issue. I think it is something messed up in the electronics- a weak solder joint, a bad chip, who knows. It's like the unit fails a "power on self test". Unfortunately, I do not have a solution yet. Don't want to buy another Masterbuilt for sure... only use this 1-2 times a year. Will share if I find anything.
This unit has a calibration function which can compensate for temperature errors of +/-30 deg F. Hold the BAKE button for 4 seconds to enter this mode. Use the Temp UP/DN buttons to adjust the temperature offset. Push START to enter the new offset.
Also, the typical manual oven thermometers are notoriously inaccurate.
If this doesn't solve your problem, next items may be the temperature sensor or control board. If it is the control board we may be able to repair it for you at www.fixyourboard.com.
Things to check- The screw in fuses, they are usually the 30 amp fuses for the oven. Next is the clock assembly, often these clocks will have the words "push for manual" or "turn for manual", this will put the clock back into the normal operating mode rather than the automatic mode. Next, you may have to remove the power and check for any burnt wires. If all checks ok, you will have to test the selector switch and oven control. Oven temp problems: Temperature is too low possible trouble makers, blown oven fuse, bake element is out, burnt wire, oven probe clips, oven temp control, oven temp sensor. Temperature is too high in the oven possible trouble makers, oven temp control, oven relay ( if used ), oven probe clips, oven temp sensor, shorted wire. These oven probe clips often rust off and the oven temp probe hangs down, or touches the oven wall giving false temperature readings to the oven control.
What you need to do is check the resistance of the booster tank temperature probe. The error 210 means a short circuit in the booster temp probe. At room temperature, the resistence should read about 1k Ohms. If you are reading significantly lower than that, then you will need to replace your booster temperature sensor. You also want to check the 4 pin square molex connector on the I/O board on top. Make sure all connections are tight, secure, and that there are no "bridges" across the connections for the temp sensors.
Circuit board defective
Replace control board
1. The oven temp has risen above 665F and the door is not locked or 2. The temp has risen above 965F with the door locked
1. Check oven temp in mode that failure occurred. Replace EOC (Electronic Oven Control) if above limits 2. Check 8-pin connector. Check and replace oven temperature sensor if necessary
Oven temperature sensor is open (above 3000 ohms)
Check resistance of oven temperature sensor, check for open wiring between oven temperature sensor and control
Oven temperature sensor is shorted (below 500 ohms)
Check resistance of oven temperature sensor, check for shorted wiring between oven temperature sensor and control
Internal watchdog circuit has detected a failure
Defective EOC (Electronic Oven Control)
Check push buttons and dome switches on control
Logic interrupted (lock motor switch sequence)
Check door lock switches and wiring
Most likely problem is the oven temp. sensor. Should check around 1100 ohms at room temp. I would replace that first because it is the easiest and cheaper than an oven control.