American Standard
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⛔ Do Not Use
American Standard - Error Code 179
American Standard Central Air Conditioner error code 179: Flame sensor failure.
Is it safe?
⛔ No — stop using
Do NOT operate — potential gas or CO hazard. Ventilate the area and call a technician immediately.
Can I fix it?
Technician Required
Repair cost
Pro: $150–$600
⏱ 1–3 hours (pro)
What Does Error Code 179 Mean?
American Standard Central Air Conditioner error code 179: Flame sensor failure.
Part that typically fails: Gas valve / igniter / heat exchanger
Do NOT operate — potential gas or CO hazard. Ventilate the area and call a technician immediately.
Symptoms You May Notice
- ⚠️ Wrong temperature reading on thermostat
- ⚠️ System runs all day without reaching setpoint
- ⚠️ Error code on control board
What the Technician Will Do
🔧 Professional repair required. Do not attempt DIY — this repair requires specialized tools or certification.
- 1 Check your owner's manual for model-specific guidance on error code reset procedures
- 2 Test the temperature sensor with a multimeter — replace if reading is outside spec
- 3 Inspect sensor wiring harness for damage or loose connections
- 4 Check that gas supply valve is fully open and gas supply pressure is adequate
- 5 Clean the flame sensor rod with fine steel wool — carbon buildup is the #1 cause
⚡ Quick tip: Always try a full power reset first — turn the unit off at the breaker, wait 30 seconds, restore power.
Frequently Asked Questions
What does American Standard Central Air Conditioner error code 179 mean? ▼
Error code 179 on a American Standard central air conditioner indicates: Flame sensor failure. The unit has detected this condition and has limited or stopped operation to prevent further damage.
How do I fix American Standard Central Air Conditioner error code 179? ▼
Start by powering the unit off for 30 seconds and restarting. If error 179 returns, the underlying cause (flame sensor failure) needs to be addressed. Check wiring connections and filters first before replacing components.
Is American Standard error code 179 serious? ▼
It depends on the root cause. Some 179 errors resolve with a reset. Others indicate a failed component that requires professional repair. Don't continue operating with this error — it can lead to further damage.