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not-heating [2018/07/12 14:40] โ€“ samuelpinchesnot-heating [2020/12/25 02:13] (current) โ€“ external edit 127.0.0.1
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 ==== 1. Check the temperature on the LCD ==== ==== 1. Check the temperature on the LCD ====
-If the LCD temperature is -15C for either the bed or nozzle, then either the connection going from the sensor to the motherboard is broken, or the sensor itself is broken. Check all the connections are plugged in FIRMLY! Examine the connector plugs also, check that no wires are loose or coming out of the connectors. If the LCD temperature shown is 0C, then there may be a temperature sensor connection problem, or, there may be a communication problem between the LCD and the main motherboard, so you need to check the LCD connections as well.+If the LCD temperature is -15C for either the bed or nozzle, then either the connection going from the sensor to the motherboard is broken, or the sensor itself is broken. Check all the connections are plugged in FIRMLY! Examine the connector plugs also, check that no wires are loose or coming out of the connectors. If the LCD temperature shown is 0C, then there may be a temperature sensor connection problem, or, there may be a communication problem between the LCD and the main motherboard, so you need to check the LCD connections as well. If the temperature is around 300C, then you may have a short circuit, or a damaged port on the motherboard - see [[a5:faulty-temperature-readings|this page]] for further advice.
  
 ==== 2. Check for error messages while heating via Pronterface ==== ==== 2. Check for error messages while heating via Pronterface ====
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 If you see an error about "HEATING FAILED" this means that the printer did not detect a sufficient change in temperature while heating up. This is a safety feature, and suggests there is a fault with wiring somewhere - energy is going in, but it is not ending up in the bed. Perhaps there is a loose connection somewhere - for example the heated bed connector may be damaged. If you see an error about "HEATING FAILED" this means that the printer did not detect a sufficient change in temperature while heating up. This is a safety feature, and suggests there is a fault with wiring somewhere - energy is going in, but it is not ending up in the bed. Perhaps there is a loose connection somewhere - for example the heated bed connector may be damaged.
 +
 +For more info on the thermal safety systems in the Marlin Firmware, see [[thermal-runaway|this page]].
  
 ==== 3. Check your sensors and heaters are not broken ===== ==== 3. Check your sensors and heaters are not broken =====
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 A video tutorial on replacing the Hot-End Thermistor can be found [[https://youtu.be/eDtfU_w1hA8|here]]. A video tutorial on replacing the Hot-End Thermistor can be found [[https://youtu.be/eDtfU_w1hA8|here]].
 +
 +==== 4. Check your bed connector is not burned ====
 +[[burned-bed-connectors|See this article]] 
  
 ==== Further Troubleshooting ==== ==== Further Troubleshooting ====
-**If you think your motherboard thermistor port is damaged, there is information on using the spare port [[a5:faulty-temperature-readings|here]].**+**If you are still getting faulty temperature readings after checking your thermistor temperature sensors are ok, it may be that your motherboard thermistor sensor port is damaged. There is information on using the spare port [[a5:faulty-temperature-readings|here]].**
  
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not-heating.1531370421.txt.gz ยท Last modified: 2020/12/25 02:13 (external edit)