Tempstar 9 Flashes Error Code

What does Tempstar 9 Flashes mean?

On a Tempstar packaged gas/electric unit, the integrated gas unit controller (IGC) LED flashing nine times is a temporary one-hour auto-reset code. The manual explains this indicates an internal processor fault that will reset itself within one hour. It can be caused by stray RF signals in or near the structure, and the self-reset behavior is a UL requirement.

Symptoms

• IGC LED flashes nine times instead of staying continuously on
• Temporary interruption of normal control operation
• Code clears on its own within about one hour
• Fault may coincide with nearby radio-frequency interference

Common causes

• Internal processor fault on the IGC
• Stray RF signals in the structure or nearby
• Transient electrical interference

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Diagnostic steps

1. Confirm the LED code

   Remove the control access panel and verify the IGC LED is flashing nine times, which Table 5 notes is a temporary one-hour auto-reset condition.

2. Allow the automatic reset

   The manual states this fault resets itself within one hour; wait for the control to clear the code on its own.

3. Check for RF interference sources

   Look for nearby equipment producing stray RF signals, which the manual identifies as a possible cause of this processor fault.

4. Verify normal operation after reset

   After the auto-reset, confirm the LED returns to continuously on and the unit resumes normal heating.

When to call a professional

This code is designed to clear automatically within one hour, so immediate service is usually unnecessary. Call a qualified service technician if nine flashes recur frequently or the control does not return to normal after resetting, since persistent processor faults may indicate a control or interference problem. The manual reserves service for a qualified technician with proper tools and test instruments.