The Masterbuilt error code 4 means that the smoker is not heating up to the set temperature. This can be caused by a few things, such as the smoker being turned off, the power cord being disconnected, or a blown fuse. If the smoker is turned off, simply turn it back on and wait for it to heat up to the set temperature. If the power cord is disconnected, reconnect it and wait for the smoker to heat up. If there is a blown fuse, replace the fuse and wait for the smoker to heat up.
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1. Check the circuit breaker and reset if necessary
- Open the cover of the circuit breaker to view the breaker and reset contacts. If the breaker has been replaced, check the manufacturer's part number and ensure that the replacement matches the circuit breaker in function and size.
- Close the circuit breaker cover and turn on the power to the garage or workshop.
- Touch the reset button on the circuit breaker and wait for the breaker to reset.
- If the breaker does not reset, test the circuit by turning on a light or appliance. If the circuit still does not work, replace the circuit breaker.
2. Check the wiring and replace any damaged parts
- Check the wiring to the control unit. If there is a problem with the wiring, it will need to be repaired or replaced.
- If there is a problem with the wiring, it may also be necessary to replace any damaged parts in the control unit. This may include the power supply, the control unit housing, or the wiring.
- If the wiring is damaged, it may also be necessary to replace the control unit.
3. Check the heating element and replace if necessary
- Verify that the heating element is working by checking the voltage at the electrical outlet. If the voltage is low, the heating element may be faulty and should be replaced.
- If the voltage is good, remove the screws that hold the heating element in place.
- Remove the heating element.
- Inspect the heating element for damage. If there is damage, replace the heating element.
- Reinstall the heating element by screwing it in place.
- Verify the voltage at the electrical outlet.
4. Clean the burner assembly and make sure all parts are properly seated
- Remove the burner assembly by unscrewing the 4 screws that hold it in place.
- Clean all of the surfaces surrounding the burner assembly with a clean cloth.
- Check to make sure that the burner assembly is seating properly in the grill by gently pressing down on each side.
- Replace the burner assembly if necessary.
Still not working? maybe try one of these options:
- Check the igniter and replace if necessary.
- Check the temperature sensor and replace if necessary.
- Check for blockages in the vent and clear if necessary.