Coffee Maker: Won't Turn on
The coffee maker is generally something people use every day, so when it won't turn on, this can be frustrating. Let us walk you through the repair process, by first narrowing down the possible parts that could be responsible for this. Check the power cord, switch, knob, control board, thermal fuse, and thermostat. Our guide will let you know what to look for when inspecting these parts, and ways you can fix it. Refer to your owner's manual for more specific advice on your model.
Knobs
If your coffee maker won’t turn on when you use an exterior knob, it means something inside related to the knob or switch is likely damaged. Knobs engage with the switches in a number of ways. If the knob has become damaged, then it might not work with the switch. To check the knob, unplug the unit and remove the front cover. If the knob is misaligned, put it back in place. If the knob is damaged, remove it. You may need to unscrew it or simply pop it out from a plastic clip. Replace with a new knob.
If your coffee maker won’t turn on when you use an exterior knob, it means something inside related to the knob or switch is likely damaged. Knobs engage with the switches in a number of ways. If the knob has become damaged, then it might not work with the switch. To check the knob, unplug the unit and remove the front cover. If the knob is misaligned, put it back in place. If the knob is damaged, remove it. You may need to unscrew it or simply pop it out from a plastic clip. Replace with a new knob.
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Power Cords
If the power cord to your coffee maker has been cut or damaged and the wires have a poor contact, the unit will not be able to turn on. To replace the power cord, flip the unit over and remove the screws holding the bottom cover in place. The cord may be threaded through a clip, you can pull the cord out of the clip for better access. The cord is attached to the circuit board. Remove the screws holding the board in place and pull it out. To detach the power cord, which splits into two where it is attached to the board, you can cut the wire, strip it, and twist it onto the new power cord, or use a soldering iron to detach the old cord and attach the new one.
If the power cord to your coffee maker has been cut or damaged and the wires have a poor contact, the unit will not be able to turn on. To replace the power cord, flip the unit over and remove the screws holding the bottom cover in place. The cord may be threaded through a clip, you can pull the cord out of the clip for better access. The cord is attached to the circuit board. Remove the screws holding the board in place and pull it out. To detach the power cord, which splits into two where it is attached to the board, you can cut the wire, strip it, and twist it onto the new power cord, or use a soldering iron to detach the old cord and attach the new one.
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Switches
Your coffee maker may not turn on because the exterior buttons are not properly engaging the switch. To access the switch, first unplug the unit, remove the carafe and flip it upside down. Remove the bottom screws holding the plastic cover in place. Different units vary, but yours may have three connections to the power switch. Slide these back and squeeze the power switch to pop it out of place. Attach the connections to the new power switch and pop it into place.
Your coffee maker may not turn on because the exterior buttons are not properly engaging the switch. To access the switch, first unplug the unit, remove the carafe and flip it upside down. Remove the bottom screws holding the plastic cover in place. Different units vary, but yours may have three connections to the power switch. Slide these back and squeeze the power switch to pop it out of place. Attach the connections to the new power switch and pop it into place.
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Fuses
Thermal fuses will stop the flow of power if the coffee maker becomes too hot. They need to be replaced when they have burned out. To check the fuses, flip the unit over and remove the bottom cover to expose the heating assembly and parts. You can use a multi-meter, set to continuity to check the fuses. If the fuses have no continuity they should be replaced.
Thermal fuses will stop the flow of power if the coffee maker becomes too hot. They need to be replaced when they have burned out. To check the fuses, flip the unit over and remove the bottom cover to expose the heating assembly and parts. You can use a multi-meter, set to continuity to check the fuses. If the fuses have no continuity they should be replaced.
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Control Boards
There may be an issue with the control board if your coffee maker won’t turn on. These boards contain components that can fail causing the unit not to power on at all. To remove the board, turn the unit upside down and remove the screws holding the plastic bottom in place. The control board may be held in place with a bracket and screws. Detach the wire connection assembly to the control board and attach to new board. Replace the control board with the bracket and screw and re-assembly the coffee maker.
There may be an issue with the control board if your coffee maker won’t turn on. These boards contain components that can fail causing the unit not to power on at all. To remove the board, turn the unit upside down and remove the screws holding the plastic bottom in place. The control board may be held in place with a bracket and screws. Detach the wire connection assembly to the control board and attach to new board. Replace the control board with the bracket and screw and re-assembly the coffee maker.
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Thermostats
A faulty thermostat can also be the reason your coffee maker won’t turn on. After you have checked the thermal fuses and found them to be in working order, you can easily check the thermostat as well. The thermostat is a small white part, held in place with a metal clip. Use a multi-meter to test the thermostat terminals for continuity. If the thermostat is faulty, use a screwdriver to pop the metal clip off. If the thermostat wires are welded in place, you will need terminal ends to attach the new thermostat to the existing wires. Snip the wires, strip them back, and crimp on the terminal ends. Secure the new thermostat in place with the metal clip and reassembly the coffee maker.
A faulty thermostat can also be the reason your coffee maker won’t turn on. After you have checked the thermal fuses and found them to be in working order, you can easily check the thermostat as well. The thermostat is a small white part, held in place with a metal clip. Use a multi-meter to test the thermostat terminals for continuity. If the thermostat is faulty, use a screwdriver to pop the metal clip off. If the thermostat wires are welded in place, you will need terminal ends to attach the new thermostat to the existing wires. Snip the wires, strip them back, and crimp on the terminal ends. Secure the new thermostat in place with the metal clip and reassembly the coffee maker.
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