Amana Error Code 7R: Low Flame Signal

Severity
Critical
Type
digital display
Estimated repair cost: $75 — $200 (part only)
Warning: This error indicates a problem with the furnace's flame detection. There is a risk of gas buildup, so shut the furnace down immediately and call for professional service.

How to Fix Amana Code 7R

  1. Step 1: Turn off the furnace. Locate the furnace's power switch (usually on the side of the unit) and switch it to the 'off' position.
  2. Step 2: Check your gas supply. Ensure that the gas supply to your house is turned on and that other gas appliances are working correctly.
  3. Step 3: Call a qualified HVAC technician. Do not attempt to troubleshoot the furnace yourself, as this involves working with gas and high voltage electricity.

How to Reset Amana Code 7R

  1. Turn off the furnace power switch, usually located on or near the unit.
  2. Turn off the circuit breaker for the furnace. Wait 30 seconds.
  3. Restore power at the breaker and flip the furnace switch back on.
  4. Set the thermostat to call for heat. If the error code returns after 2-3 ignition attempts, the fault requires repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Amana Error Code 7R Mean?

The '7R' error code on your Amana furnace indicates a low or unstable flame signal. This means the furnace control board isn't consistently 'seeing' the flame after ignition. The furnace goes through its normal start-up sequence: the inducer motor starts, the igniter heats up, and the gas valve opens. However, if the flame sensor doesn't detect a strong enough flame within a few seconds, the control board shuts off the gas to prevent a dangerous gas buildup. This is a critical safety feature. A weak flame signal can be caused by several factors, from a dirty flame sensor to problems with the gas supply itself. Because this involves gas and combustion, it's important to address it quickly and safely.

Common Causes

  • Dirty or improperly positioned flame sensor
  • Weak gas pressure or supply
  • Faulty flame sensor
  • Incorrect gas valve adjustment
  • Control board malfunction

Diagnostic Steps

If... Check Expected
Furnace displays 7R error after ignition attempt Measure flame sensor microamps (uA) during burner operation Minimum 2 uA DC. Ideally 4-6 uA DC.
Low microamp reading Inspect and clean the flame sensor rod with steel wool or fine emery cloth. Visually clean, no cracks or damage. Re-test microamps.
Microamps still low after cleaning Measure gas pressure at the gas valve with a manometer Within the range specified on the furnace rating plate (typically 3.5-4.0" WC for natural gas).
Gas pressure is within range and flame sensor is clean Check the flame sensor wiring for continuity and proper connection to the control board. Good continuity, secure connection.

Applicable Amana Models

Replacement Parts

Part OEM Number Est. Cost Where to Buy
Flame Sensor B11726-13 — Find Part
Gas Valve — — —
Integrated Furnace Control (IFC) Board — — —

Related Codes on Same Models

Other codes that affect the same Amana model families as 7R.

Code Description Severity
10R Communication Error Warning
1R Flame Without Call Critical
2R Pressure Switch Stuck Closed Warning
3R Pressure Switch Open Warning
4R High Limit / Rollout Critical
5R Ignition Lockout Critical
6R Gas Valve Relay Fault Critical
8R Reversed Polarity Critical
9R Blower Motor Fault Warning