Problem Description

ION system displays error codes indicating high temperature conditions occurring over extended periods.

Symptoms

• High temperature conditions persist even after Air Verification Set-up
• Temperature probe shows normal readings initially, then spikes significantly
• Delta temperature exceeds maximum rating of 65 degrees (reaching 63-67 degrees)
• High limit tripping occurs during operation

Diagnostic Findings

Air Verification Results: - Verify duct verification was done and rerun to see if it changes. 

Temperature Readings: -Verify temperature rise as its running. Monitor discharge temperature through ION thermostat. 

VERIFY: Clean blower, motor, blower compartment, and Coil

Solution

Factory-Recommended Adjustments:

1. Heating Airflow Adjustment

   • Change setting from COMFORT to EFFICIENCY 2
   • This increases airflow in heating mode

2. System Calibration

   • Run Duct Assessment again to improve system accuracy
   • Verify proper airflow distribution

Results

After implementing these adjustments, the high limit issue did not reoccur

Follow-up

Monitor system performance to ensure the adjustments resolve the high temperature limit tripping issue long-term.