11
Easy Fix
Carrier · Central Air Conditioners & Furnaces
No Previous Error Code
Quick Answer
Error code 11 on your Carrier Central Air Conditioners & Furnaces means: No Previous Error Code. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Verify system is operating normally by checking supply and return air temperatures
2
Check thermostat is calling correctly and system responds
3
Monitor system through a complete heating or cooling cycle to confirm normal operation
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
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