Amana AMVM970803BN Error Code None: No Power to Control Module

What Does Code None Mean?

When the Amana AMVM970803BN is working, its integrated control module lights a dual 7-segment display near the blower compartment. A fully blank display means the module itself is receiving no power — there is no 115-volt line power reaching the furnace, or the 24-volt supply from the transformer to the module is missing. Because this control module runs everything on this furnace (the inducer, the modulating gas valve, and the variable-speed circulator blower), a loss of power leaves the whole unit dead and unable to display any other fault code.

On this platform the most common and homeowner-safe cause is a tripped circuit breaker, a blown fuse, or the furnace's own service switch being off. A furnace door/blower-compartment safety switch that is not being pressed (because a panel is not fully seated) can also cut power and mimic a dead board.

This is different from code EE5, which is a blown low-voltage fuse or a 24-volt short that the module can sometimes still flag before it dies. A truly blank display points upstream to lost 115-volt power or a failed module, whereas EE5 is a fault the board reports about its own low-voltage circuit.

What You'll Notice

• The 7-segment display is completely dark with no letters, numbers, or flashing
• The furnace does not respond at all to a call for heat from the thermostat
• The inducer and blower are silent — nothing spins up
• The circuit breaker for the furnace may be tripped, or the furnace service switch may be off
• A furnace access panel may be loose or not fully seated against its door switch

Common Causes

How This Is Diagnosed

Diagnosis starts at the simplest, most-likely source and works upstream: confirm the furnace service switch is on, then check the dedicated breaker at the panel. If the breaker is tripped, the reason it tripped still needs to be understood. Next, the blower-door/access-panel safety switch is verified to be fully pressed by a correctly seated panel.

If line power is confirmed present but the display stays blank, a technician measures the 24-volt output of the transformer and the module's input. Missing 24 volts with good 115 volts points to a transformer, wiring, or module fault rather than anything a homeowner should touch.

How to Fix It: Restore Power to the Control Module

What You'll Need

• Flashlight

Steps

1. Turn off power at the breaker or furnace switch and shut off the gas supply before you begin Switch the furnace service switch to OFF and turn the dedicated breaker OFF, then turn the manual gas shutoff valve perpendicular to the pipe. If you smell gas at any point, leave immediately and call your gas company. This makes it safe to open panels and reseat switches.
2. Reset the circuit breaker At the electrical panel, find the furnace breaker. If it is tripped (sitting between ON and OFF), push it fully to OFF, then firmly back to ON. A breaker that trips again immediately indicates a short circuit that needs a professional.
3. Confirm the furnace service switch is on There is a wall-mounted switch (it looks like a light switch) near the furnace. Make sure it is in the ON position. This switch is sometimes turned off by accident during cleaning or storage.
4. Reseat the blower access panel The blower-compartment door presses a safety interlock switch. If the panel is loose or misaligned, the switch stays open and the board gets no power. Remove and firmly reseat the panel so it sits flush and clicks the interlock closed.
5. Restore power and check the display Turn the service switch back on (and the breaker if you turned it off). The 7-segment display should light up. If it remains blank, stop and call a technician — the problem is upstream power or the module itself.

When to Call a Professional

Contact a licensed HVAC technician if:

• The display stays blank after the breaker, service switch, and access panel are all confirmed correct
• The furnace breaker trips again immediately each time it is reset
• There is a burning or hot-electrical smell near the furnace
• Line power is present at the furnace but the module still shows nothing

✓ Verified against manufacturer service manual — March 2026