Applicable Systems
Carrier ComfortLink Thermostat/Controller
Symptoms
Display board fault. The display board is not functioning correctly.
Possible Causes
- Display board component failure
- Display board connection or ribbon cable fault
Troubleshooting Steps
- Step 1: Check the display board ribbon cable connection
Cable is loose or damaged - Step 2: Replace the display board if the cable is good
New display board operates normally
How to Reset
To reset: Replace the display board or fix the cable, then reset.
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Source: Carrier HVAC Troubleshooting Guide, Carrier Corporation
Category: HVAC Residential
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