Amana AMVC960803BN Error Code E12: Redundant Relay Open
What Does Code E12 Mean?
The AMVC960803BN uses a two-relay design on its Integrated Control Module as a safety layer for the gas valve: one relay commands the valve during normal operation and a second, redundant relay provides a backup shutoff path. The board monitors both. E12 is set when that redundant relay is detected open at a time it should be closed, which breaks the series path and keeps the main relay from being able to energize the valve. The result is a no-fire, no-heat condition.
Because the redundant relay is a fixed part of the control board rather than a separate replaceable component, a relay that fails open generally means the Integrated Control Module itself is replaced. A technician confirms the relay-state discrepancy before condemning the board, since the manual directs that the control be replaced only after other checks pass.
E12 is one of a pair with E13. E12 is the redundant relay stuck OPEN (no gas can flow — a no-heat fault), while E13 is the redundant relay stuck CLOSED (gas could flow when it should not — a more urgent safety fault). Both are part of the same gas-valve safety circuit and both are professional repairs.
What You'll Notice
- The furnace will not fire and delivers no heat
- The 7-segment display shows E12
- The igniter and inducer may run through their steps but the burners never light
- The code persists across power resets
- The fault behaves consistently on every heat call rather than intermittently
Common Causes
| Cause | Likelihood | DIY? |
|---|---|---|
| Faulty redundant gas valve relay on control board | Most common | ✗ Call a pro → |
How This Is Diagnosed
A technician verifies the reported relay-state mismatch on the Integrated Control Module, confirming the redundant gas-valve relay is genuinely failing to close rather than being misread because of a power or wiring issue. They run the other checks the manual specifies for the gas-valve safety circuit first; if those pass and the redundant relay remains stuck open, the control board is replaced, because the relay cannot be serviced separately.
When to Call a Professional
This code involves components that are not homeowner-serviceable, so have a licensed HVAC technician diagnose and repair it. Keep in mind:
- E12 is displayed and the furnace will not fire
- The code returns after a power reset
- The igniter and inducer sequence normally but no gas lights
- You want confirmation the control board, not another gas-circuit part, is the true fault
Frequently Asked Questions
Does E12 mean I need a new control board?
Usually yes, because the redundant gas-valve relay is built into the Integrated Control Module and cannot be replaced on its own. A technician should confirm the diagnosis before ordering the board.
How is E12 different from E13?
E12 is the redundant relay stuck open, which simply prevents gas flow (a no-heat fault). E13 is the same relay stuck closed, meaning gas could flow when it should not, which is the more urgent safety fault.
Can I keep resetting the furnace to get heat with E12?
No. The safety circuit is intentionally blocking operation, and repeated resets will not restore heat until the failed relay (control board) is replaced.
Sources
✓ Verified against manufacturer service manual — March 2026