Amana AMSS960803BN Error Code LED Steady On (Continuous): Normal Operation
What Does Code LED Steady On (Continuous) Mean?
On the Amana AMSS960803BN Integrated Control Module, a steady on LED is the board's "all clear." It confirms that both 115-volt and 24-volt power are present, all safety circuits are intact, and no fault has been recorded. This is the reference state you compare every flash code against — the module is monitoring the system and is ready to run the moment the thermostat calls for heat.
The furnace may be actively heating or simply standing by between cycles; in either case the light stays steady. It only breaks into a numbered flash pattern (one through eight flashes) when the module logs a specific fault, goes dark if the board loses power, or flashes rapidly and continuously if it detects reversed line polarity. A single unblinking light is exactly what you want to see.
If the LED is steady on but the house is still cold, the problem is almost certainly not the furnace's control module. The issue usually lies upstream at the thermostat or its wiring, since the board is reporting that it sees nothing wrong on its side.
What You'll Notice
- The diagnostic LED glows a single steady, unblinking light rather than flashing any count
- The furnace heats normally on a call for heat and cycles off when the thermostat is satisfied
How This Is Diagnosed
Because the steady LED confirms the control module sees no fault, troubleshooting a "steady light but no heat" situation moves off the furnace board and onto the thermostat side. The usual sequence is to confirm the thermostat is set to Heat with a setpoint above the current room temperature, replace the thermostat batteries if it uses them, and then check that the low-voltage thermostat wiring is secure at both the thermostat and the control board. A steady LED tells you the module has power on both voltage rails and is ready to respond.
- The LED stays steady on but the furnace never starts even with the thermostat set correctly to Heat
- You would like a routine safety and combustion check even though no fault code is showing
Frequently Asked Questions
My Amana's light is a steady solid glow but there's no heat — why?
A steady LED means the control board sees no fault, so the problem is usually upstream: the thermostat mode or setpoint, dead thermostat batteries, or a loose thermostat wire. Check those before assuming a furnace fault.
Should the diagnostic LED always be steady on?
During normal standby and heating, yes. The LED only breaks into a numbered flash pattern when the module records a fault, so a steady, unblinking light is the healthy state.
Sources
✓ Verified against manufacturer service manual — March 2026