E15
Wolf
Internal Control Board Fault
Furnace displays E15; unit may not respond to thermostat or may behave erratically.
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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
Failed microprocessor on Wolf control board, Corrupted firmware, Power surge damage, Moisture intrusion on control board
How to Fix / Troubleshooting
Safety: Turn off power before inspecting the control compartment.
- Power cycle: Turn off the furnace at the service switch or breaker for 1–2 minutes, then restore power. Observe if E15 clears.
- Inspect board: Remove the blower door and examine the Wolf control board for burn marks, corrosion, or insect damage. Ensure all harnesses are firmly seated.
- Environment check: Look for signs of water leaks or condensation dripping onto the control. Correct any water source before replacing components.
- Board replacement: If E15 persists and all external sensors and wiring are verified good, the Wolf integrated furnace control board likely needs replacement by a qualified technician.
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Repair Difficulty
Professional Required
5/5
Required Part
Wolf Integrated Furnace Control Board
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