If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component(s) that the switch is connected to. If the switch has the correct power rating then it won’t get hot if the other components are OK, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan circuit or the motor circuit etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check the components if the switch is rated correctly.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
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The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with alligator clips at each end and a 10W 1 MegOhm resistor in series i.e. clip- lead - resistor - lead - clip, and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with alligator clips at each end and a 10W 1 MegOhm resistor in series i.e. clip- lead - resistor - lead - clip, and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make doubly sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component(s) that the switch is connected to. If the switch has the correct power rating then it won’t get hot if the other components are OK, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan circuit or the motor circuit etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check the components if the switch is rated correctly.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with alligator clips at each end and a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with alligator clips at each end and a 10W 1 MegOhm resistor in series i.e. clip- lead - resistor - lead - clip, and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component(s) that the switch is connected to. If the switch has the correct power rating then it won’t get hot if the other components are OK, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan circuit or the motor circuit etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check the components if the switch is rated correctly.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
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The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with alligator clips at each end and a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component(s) that the switch is connected to. If the switch has the correct power rating then it won’t get hot if the other components are OK, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan circuit or the motor circuit etc.
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You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check them if the switch is rated correctly.
+
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check the components if the switch is rated correctly.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
+
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component(s) that the switch is connected to. If the switch has the correct power rating then it won’t get hot if the other components are OK, The switch voltage and current ratings should be marked on it
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Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
+
Depending on which switch it is it may be the magnetron circuit, the fan circuit or the motor circuit etc.
-
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
+
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to and then check them if the switch is rated correctly.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there just to make sure.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months, even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead (12 gauge wire) with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
-
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead with a 20W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
+
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead with a 10W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
If the plastic is melting then it means that too much current is flowing through the switch. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
+
If the plastic is melting then it means that too much current is flowing through the switch and it is getting hot. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead with a 20W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.
Hi @templedf ,
If the plastic is melting then it means that too much current is flowing through the switch. So the problem is most likely the other component that the switch is connected to. If the switch has the correct power rating then it won’t get hot, The switch voltage and current ratings should be marked on it
Depending on which switch it is it may be the magnetron circuit, the fan or motor or the control board etc.
You would need to have the schematic of the oven or at least to trace the wires from the switch (one side would most probably come from the input power connection) and check where it goes to.
''Be safety aware when working in microwave ovens as they are dangerous if you don’t know what you’re doing.''
The HV capacitor can seriously injure you as it can store enough voltage (>6000V DC) for months even if the oven has been disconnected for this amount of time. It needs to be discharged correctly before attempting any repair work. Most simply short out the terminals on the HV capacitor to dissipate the voltage but this can damage the capacitor or if an inappropriately sized screwdriver was used can actually weld it onto the terminals. Most people doing it this way are too impatient to do it correctly. Make a lead with a 20W 1 MegOhm resistor in series and connect it between the +ve terminal of the capacitor and the chassis and let it discharge the capacitor. Wait for about 5-10 minutes and then use the screwdriver to dissipate any residual charge that may be still there.