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American Standard - ⚠️ Use With Caution

American Standard - Error Code 178

American Standard Furnace error code 178: Inducer motor fault.

Last reviewed: Last updated:

Methodology: We combine OEM HVAC documentation with field repair patterns, then review for safety-first troubleshooting.

Sources: HVAC manufacturer documentation, installation/service manuals, and technician-reported repair patterns.

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

Is it safe?
⚠️ Use with caution
Caution — continued use without airflow causes overheating. Turn off until repaired.
Can I fix it?
Technician Recommended
Tools: Multimeter, Screwdriver set, Capacitor tester
Repair cost
DIY: $30–$200 (motor or capacitor)
Pro: $150–$500
⏱ 45–90 min

What Does Error Code 178 Mean?

American Standard Furnace error code 178: Inducer motor fault.

Part that typically fails: Fan motor / run capacitor

Caution — continued use without airflow causes overheating. Turn off until repaired.

Symptoms You May Notice

Troubleshooting Steps

  1. 1 Check your owner's manual for model-specific guidance on error code reset procedures
  2. 2 Check for debris obstructing the fan blades on indoor or outdoor unit
  3. 3 A technician should test motor windings and run capacitor — replace if failed
  4. 4 If the error persists after reset and basic checks, contact a qualified technician
🛠️ Tools needed: Multimeter, Screwdriver set, Capacitor tester · Time: 45–90 min
⚡ 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 Furnace error code 178 mean? ▼
Error code 178 on a American Standard gas furnace indicates: Inducer motor fault. The unit has detected this condition and has limited or stopped operation to prevent further damage.
How do I fix American Standard Furnace error code 178? ▼
Start by powering the unit off for 30 seconds and restarting. If error 178 returns, the underlying cause (inducer motor fault) needs to be addressed. Check wiring connections and filters first before replacing components.
Is American Standard error code 178 serious? ▼
It depends on the root cause. Some 178 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.

More American Standard - Error Codes

All American Standard - codes → All American Standard HVAC codes →

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