Alpha
No Power / Control Not Initializing
Water heater does not start heating after power outage; display may be blank.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Tripped internal fuse on Alpha control board, Loose power connections, Failed transformer or power supply, Faulty on/off switch
How to Fix / Troubleshooting
Safety: Turn OFF power at the breaker before opening covers.
- Verify supply: Confirm voltage at the heater’s input terminals with a multimeter (only if trained).
- Check switch: Ensure any external or built-in Alpha power switch is in the ON position.
- Inspect internal fuse: Some Alpha boards have a replaceable fuse. If blown, investigate cause before replacing with the same rating.
- Look for damage: Inspect the control board for burn marks or damaged components.
If the display remains dead with correct power present, the control board or internal power supply likely needs replacement by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board
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