slow flash
Easy Fix
Trane · HVAC Systems (AC, Furnaces & Heat Pumps)
Normal Operation - No Call for Heat
Quick Answer
Error code slow flash on your Trane HVAC Systems (AC, Furnaces & Heat Pumps) means: Normal Operation - No Call for Heat. 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 the thermostat is set correctly and calling for heat or cool if expected
2
Confirm the system responds when the thermostat is adjusted to create a demand
3
No action required if the system is simply in standby mode
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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