When your Haier stove turns off by itself, the touchpad is the most likely cause, especially when some buttons respond intermittently or not at all. A faulty touchpad can send incorrect commands and shut the stove down, so replace it if the controls do not respond consistently. On an electric range, inspect the power cord connections at the terminal block next. Loose or burned connections can overheat, interrupt power, and melt the wire insulation. Replace a damaged terminal block or power cord, and have a licensed electrician check a burned receptacle. If a surface element starts working after you turn its control off and back on or select another heat setting, the range control board may be failing. Loose or burned wire connectors can also cause intermittent power loss. Less commonly, a failed relay board can stop sending power to the heating elements and other components, while a defective main control board can shut down the entire stove. Disconnect power before inspecting wiring, and enter your Haier model number to find the exact replacement part for your specific range or stove.
01 - Haier Range/Stove/Oven Touchpad
If a stove turns off on its own, determine if some of the buttons on the touchpad respond intermittently or not at all. If so, it's likely the touchpad is faulty and should be replaced.
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If the power cord connections in the terminal block on your electric range are not secure the wire can overheat, burning the connections on the terminal block, and melting the coating on the wires. Check to ensure the connections are tight and not burnt. If the terminal block connectors are burnt, the terminal block should be replaced. If the power cord terminal connectors are burnt or damaged, the power cord should be replaced. If the power cord prongs are burnt, a new power cord should be installed and the receptacle checked and replaced if necessary by a licenced electrician.
If the stove surface element starts working again when the surface element dial or control is turned off and back on or to a different heat setting, it's likely that the control board is the cause of the stove turning off on its own. You should confirm that the surface element control is functioning normally and the appliance's power cord and terminal block are in good condition before considering a control board replacement.
Inspect the wiring and connectors, especially coming from the main power cord. A loose connection can cause intermittent power failure. Inspect the wiring for breaks or burn marks. Repair wiring as needed.
Some ovens are equipped with a relay board. The relay board has several relays which control the electrical current to the heating element, and other components of the stove. If one or more of the relays on the relay board has failed, the oven may shut off. If the relay board is defective, replace it.
The main control board sends power to all the components in the stove. If the control board connections are loose, or burnt, or the control board is turning off on its own, one of the relays or other components may be bad and the control will need to be replaced.